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[[File:Levelzero.png|thumb|253x253px|The Lobby, which is the most well known Liminal Space.]]
A '''Liminal Space''' (''sometimes shortened to limspace)'' is a type of [[Extradimensional Spaces#Locational Dimensions|Locational Dimension]] that express Liminal Properties, and may greatly vary when it comes to Size, Danger and Habitability. Most Liminal Spaces are infinite<ref>Though "bounded" Limspaces aren't unheared of.</ref>, non-euclidean environments which often invoke feelings of uncanny familiarity, eeriness, nostalgia, and apprehension upon those who end up within them. The laws of physics and nature cannot be relied on within Liminal-Spaces - despite the increasing number of [[Humans|Human]] settlements.
A common theme of Liminal Spaces is an 'abandoned' or empty caricature of a familiar place or environment, often being transitional in some form, such as hallways, waiting rooms, parking lots and rest stops. While this definition is the most common type of environment present in Liminal Spaces, it should be noted that Many Liminal Spaces also take the form of places that are simply nostalgic, dreamlike, and/or uncanny, with the absence of people becoming their only unifying trait ''<small>(Except in constructed settlements)</small>''.
Liminal Spaces often are deeply connected and intertwined with a specific baseline reality, allowing both accidental and intentional access to them. Due to this many have over time been colonised by extradimensional<ref>In the perspective of the Liminal Spaces
</ref> species. Most Liminal Spaces do not have entirely native species, instead overtime mutated and evolved iterations of those who have ended up there.
{{Tocright}}
===Types of Liminal Spaces===
*'''Liminal Systems:''' Liminal Spaces often can connect and amalgamate together into what is known as a Liminal System or Cluster. These Systems can be composed of hundreds or even thousands of Liminal Spaces.
*'''Sub-Spaces'''<ref>Also known as "Levels" or "System Spaces"</ref>''':''' A "full" Liminal Space that is part of a Liminal System. A common colloquial term for such a dimension is the term 'Level'.
**'''Enigmatic Sub-Spaces:''' More difficult to access, and much more mysterious Sub-Spaces. Many of these lack an ordinal placement within their systems, instead having unknown positions.
*'''Transitional Spaces'''<ref>Also known as "Middle Rooms" or "Thresholds"</ref>''':''' A Liminal Space which is located in a intermediary position between Reality and a Liminal System, or a Limspace otherwise also connected to Reality. These often allow transport between Reality and a Liminal System, although this is not necessarily the case. These may also take the form of a location in reality with liminal properties, often acting as a gateway for transport between reality and liminal systems.
* '''Semi-Transitional Spaces:''' A unique variant of Transitional Space that has 2 different types, these being the "System-Type" and "Baseline-Type".
**'''System-Type:''' System-Type Semi-Transitional spaces physically exist in reality, but can only be accessed via full transitional or liminal spaces.
** '''Baseline-Type:''' Baseline-Type Semi-Transitional spaces are locations in reality with liminal properties, acting much like a pocket dimension. They don't necessarily lead to a liminal space/system. <small>(but they can in some cases.)</small>
*'''Intra-Spaces'''<ref>Also known as "Sub-Levels"</ref>''':''' Distinct Limspaces that are related or connected to a larger parent level. They may either directly part of their parent level or still connected while existing in a separate space. These are usually naturally created, but some circumstances or methods have allowed the creation of new Intra-Spaces.
*'''Inter-Spaces'''<ref>Also known as "Sub-Layers".</ref>''':''' Limspaces located between two separate Limspaces. In some cases they may act as a 'bridge' between the two Sub-Spaces.
*'''Micro-Spaces'''<ref>Also known as "Rooms"</ref>''':''' Typically distinct locations that are too small to be considered their own level.
==How are Liminal spaces Created?==
Liminal spaces are 'corrupted' timelines which often manifest in strange and unusual forms based out of the nostalgia and memories of those who inhabit them. Their laws of physics often contrast with what you would consider normal. Most known Liminal Spaces are either created by as of now unknown events leading to their [[Castrovalence]] rising above 1, which is catastrophic for the integrity of spacetime leading to a big-crunch like event. This event transforms a timeline subject to this event into a Liminal Space.
In some more enigmatic cases the dimensional collapse events has not clearly happened, instead a pocket dimension may be formed via unknown means. The phenomenon of Liminal Spaces taking the form based off of the collective nostalgia of the area it is entered from is present regardless of the method of creation. Most "Nostalgia-Based" theories attribute Liminal Spaces as an intermediary between Reality/Existence and Unreality/Non-Existence, with the most notable example of such a Liminal System being The Backrooms, which seemingly inhabits the aforementioned "space" in the multiverse.
{{Dimension|title1=Backrooms|inter-dimensional_index=[[Dimension-Loc:4.1/3/141.0]]|Primary_Type=Locational|multiverse=Backrooms|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|average_reality_stability=68ξ|image1=levelzero.png|caption-image1=The Lobby - the most well known sub-space within the Backrooms.|hazards=*Mental Hazards
{{Dimension|title1=Backrooms|inter-dimensional_index=[[Dimension-Loc:4.1/3/141.0]]|Primary_Type=Locational|multiverse=Backrooms|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|average_reality_stability=68ξ|image1=levelzero.png|caption-image1=The Lobby - the most well known sub-space within the Backrooms.|hazards=*Mental Hazards
*Native Beings
*Native Beings
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*Intentional accessing via constructed portals|interconnectivity_variable_(to_yata's_dimension)=8/10|nicknames=*Backrooms
*Intentional accessing via constructed portals|interconnectivity_variable_(to_yata's_dimension)=8/10|nicknames=*Backrooms
*Liminality
*Liminality
*Liminal Space|child_dimensions=See [[Liminal_Spaces#List of Sub-Spaces|"List of Sub-Spaces" Section]]}}
*Liminal Space|interdimensional index=Dimension-Loc:4.1/5/141.0|primary type=Locational|dimensional form=Unreality|locational subtype=Liminal Space|liminal subsubtype=Liminal System|child dimensions=See [[Liminal_Spaces#List of Sub-Spaces|"List of Sub-Spaces" Section]]|average reality stability=68ξ|notable inhabitants=*[["The Director"]]|native species=See [[Backrooms#Phenomena|"Entity Sightings" Section]]|immigrated species=*[[Humans]]
==Backrooms System ==
*[[Theian Natives]]
''<code><big>Designation: Limsystem-001</big></code>''
*Others|present groups=See [[List_of_Groups#Liminal_Spaces|"List of Groups" Section]]|discovered in=*16127 BGS (First Encountered by Humanity)
*141 (First Documented in Common Era)|accessible by=*Being unlucky, and noclipping out of reality into it. (A small, yet random chance of being sent there)
*Intentional accessing via constructed portals|interconnectivity variable=8/10}}{{Tocright}}
The '''Backrooms'''<ref>Classified as "Limsystem-001"</ref> is an [[Extradimensional Spaces|Extradimensional Space]] (or more accurately an amalgamation of many such spaces) that autonomously synthesizes and arranges matter to form imperfect copies of existing physical structures within [[Extradimensional Spaces|other realities]] (which are arranged into a series of interconnected 'locations' known as Sub-Spaces<ref>While in the modern academic circle the Backrooms consists of many "Sub-Spaces", many of the inhabitants of the Backrooms colloquially call the various areas that make up their dimension "levels", the archaic term for a Liminal Space part of the Backrooms System which was created before extensive understanding of the nature of Liminal Spaces and their multiple instances separate from the Backrooms.</ref>) as well as copies of the copies it has already copied, which are further supplemented with information gathered from the minds<ref>Thus it is often considered to be a rare mix of [[Memoria]] and [[Orgone]] coexisting (a fact which is impossible within Baseline Reality)  </ref> of the beings within it (mainly to fill in the gaps caused by things which don't function). Functionally it is a  materially physical "dimension" which can be interacted with as if it was tangible location despite possessing various inconsistencies in how reality 'functions' within it, causing it to be an exceptionally unstable place where the laws of physics and nature and even ones own perception cannot be safely relied upon if one were to enter it either intentionally or accidentally via an Intersection Point. Beyond the Backrooms, there are many other smaller Liminal Spaces which also gradually arrange themselves into Systems (much like the Backrooms). 


'''The Backrooms''' is the largest known Liminal System to be discovered thus far. Rather than as a Liminal Space, it is much better known as a series of enigmatic sub-dimensions where people from anywhere in the multiverse can end up, provided they [[Noclipping|noclip]] out of "reality".  
The Backrooms' most notable Sub-Space is known as "[[The Lobby]]", a labyrinthine structure consisting of mostly empty segmented rooms and corridors covered in dull-yellow wallpapers and moist tight-nit carpets acting as the overarching structure from which all other iterations of the Backrooms (which are the other Sub-Spaces) extend from as the process of reconstructing locations gradually coalesces into the uniformity of the Lobby at the middle of everything, though despite its susceptibility to structural alternations when not measured or perceived its relative monotony has allowed it to be the most easily accessible and largest location within the Backrooms (especially as nearly all individuals which enter the Backrooms arrive there). Accessing other Sub-Spaces at different degrees of abstraction is typically done via conventionally accepted entry points (such as a doors, elevators, or hallways) or can only be accessed from domestic Intersection Points. It is not understood how the Sub-Spaces are 'positioned' in relation to one another, though studies into the subject are ongoing. 
{{Hr}}
The Backrooms topographically consists of various distorted, infinite<ref>Though "bounded" Limspaces aren't unheared of.</ref>, non-euclidean environments which invoke feelings of uncanny familiarity, eeriness, nostalgia, and apprehension upon those who end up within them, usually resembling enclosed transitory rooms/environments familiar to [[Humans]], though as all of the structures within the Backrooms are synthetic in some form even places which would appear to have flora or life have a very fake feeling. The most common theme seen in locations within the Backrooms is an empty caricature of a familiar place or environment derived from the space's "source", often being transitional in some form, such as hallways, waiting rooms, parking lots and rest stops which have been stripped of many defining characteristics, though many other kinds of locations have been discovered that simply take the form of places that are simply nostalgic, dreamlike, and/or uncanny, with the absence of people becoming their only unifying trait. While many traits are associated with the Backrooms which may be used to determine how exactly it behaves and acts with the scientific method, the only absolute that can be relied upon is that more often than not there is no logic or meaning behind certain structures and properties within the Backrooms.


The Backrooms can be accessed via any location in the multiverse, although the location within the Backrooms which each location in reality leads to can differ, fitting the memories of the natives of whatever area enters. For [[Humans]], it takes the form of nostalgic urban rooms and environments for the most part. Some of the more unusual areas may be ones generated out of the nostalgia of distant alien races.   
The Backrooms exists at the infinite-points where "[[Baseline Reality]]" converges with [[Unreal Space]], a 'state of non-existence' located on the periphery between things that exist and things that don't exist), in a way which leads to the laws of physics of the places it is derived from clashing or becoming non-functional. Living beings from standard realities may accidentally enter the Backrooms thru various points where reality intersects with it (intersection points), allowing them to pass through what would otherwise be solid matter into said Space and back (as long as the bounds of the intersection point are used), though certain intentional methods of access have been discovered and exploited in the past. Within the Backrooms, most biological functions cease to some degree as while sensations such as pain and hunger can be felt they will never induce death, which is attributed to the flow of time within them being incredibly inconsistent and disjointed. Exit is possible by discovering a pre-existing intersection point with ones reality of origin, though this is often nearly impossible due to the Perception Principle.   


In modern times methods of reliably creating permanent two-way entrances have been discovered and developed, making accessing the Backrooms fairly easy. Thus, some more adventurous individuals have intentionally used such gateways to enter the Backrooms to explore it temporarily or to permanently move into it. Despite this, a majority of the people within the Backrooms are still<ref>All people who entered it before the invention of gateways entered it via this method.</ref> people who ended up there by complete accident by accidentally falling out of reality into the Backrooms. 
=== Perception Principle ===
===Sub-Spaces===
As accidental access is possible, a population of [[Humans]] has over time accumulated the Backrooms with varying levels of organization which has allowed for the existence of certain small communities of people, though establishing a proper "society" within the Backrooms is incredibly difficult. A rarely understood phenomena is that the Backrooms' structure often only remains consistent via perception, if a route is not measured (by draping ropes, drawing markings on the wall or mapping areas), then the path travelled [https://simple.wikipedia.org/wiki/Schrödinger%27s_cat#Simple_explanation may not remain consistent] due to the lack of measurement or perception as Backrooms abstracts onto itself. [[List of Groups#Liminal Spaces-0|A group]] can remain intact as everyone's perception and measurements keeps the area consistent enough for said group to persist as long as they don't stray too far from their shared perception range (with said 'perception' including all physical senses, most notably sight and hearing), with multiple stable points allowing for communities to remain in contact either via couriers, travelling in a group, or wires which allow for communication. While many communities and settlements do exist, contact is regardless limited and most that find themselves within a Liminal Space are left desolate. Non-Human lifeforms seemingly native to the Backrooms are a rare occurrence, often being reconstructed Humans or other unusual beings whose existence is rare and difficult to prove.  
While in the modern academic circle these are known as "Sub-Spaces", many of the inhabitants of the Backrooms colloquially call the various realms that make up their dimension "levels". Level is the archaic term for a Limspace part of the Backrooms System. This name was created before extensive scientific understanding of the nature of Liminal Spaces and their multiple instances separate from the Backrooms due to its distinct nature as being the first to ever be discovered.


The 'levels' are typically divided by a door, floor, or can only be accessed from no-clipping. They collectively make up the Backrooms and house all things within the system. It is not entirely understood how the levels are 'positioned' in relation to one another, though studies into the subject are ongoing.
Certain rooms or locations naturally negate the perception principle known as 'stable points' which can be discovered as points of natural congregation (seeming appearing in many places at once, but being the same location regardless of position) where shared perception ranges can be created as long as a group remains intact, with those who stray too far easily being separated if the group perception range is exited by said individual. The Backrooms tends to be naturally isolating, with coming across others outside of stable points being nearly completely impossible due to their infinite scale, thus only a tiny fraction of individuals ever manage to join groups. The perception principle is also known to affect people psychologically, with those without something to 'ground them' often being subject to various psychological issues involving forgetfulness, dissociation, depersonalization, hallucinations, delusions, and paranoia especially if isolated from stable points or perception ranges, which are together classified under 'Liminal Maladjustment'.


=====List of Sub-Spaces=====
While accidental access thru Intersection Points is the most common route of access into the Backrooms, groups such as the [[SDS Foundation]] have managed to create artificial Intersection Points which allow for controlled access into specific locations (with the most notable being the [[Portal Matrix]]). As navigation through the Backrooms without measurement is incredibly uncertain, the SDS Foundation has made use of its own measurements to utilise them as a place to hide their facilities and activities at the cost of further destabilizing the Sub-Spaces they occupy via their artificial intersection points, making those aware of their presence opposed to their activities. A major obstacle that hinders these larger exploitation projects is the fact that the flow of time within the Backrooms is non homogenous and often locally incoherent. 
*[[Antarctica (Liminal Space)|Antarctica]]
*[[Blue Dreams]]
*[[Crush Depth]]
*[[Decrepit Hospital]]
*[[Heaven (Liminal Space)|Heaven]]
*[[Inverted Reality]]
**[[Four Dimensions]]
*[[Lonely Road]]
*[[Neverending Concrete]]
*[[Neverending Staircase]]
*[[The Chasm]]
**[[A Room with nothing in it]]
*[[The Crooked House]]
* [[The Dark Forest]]
*[[The Dark World]]
*[[The Facility]]
*[[The Lobby]]
**[[Yellow Land]]  
*[[The Maple Forest]]
*[[The Mist]]
*[[The Sewer]]
=====List of Sub-Spaces (OUTDATED)=====
*''[[Level 17]]'' "The Edge"
*''[[Level 17.1]]'' "The Train"
*''[[Level 18]]'' "The fountain of youth"
*''[[Level 19]]'' "Hotel Backrooms"
*''[[Level 20]]'' "Hollow Iceberg"
*''[[Level 21]]'' "Truffle Cavern"
*''[[Level 22]]'' "Goliath"
*[[Level 23|''Level 23'']] "Gargantuans"
*[[Level 24|''Level 24'']] "Timeline Island"
*''[[Level 25]]'' "Apartment Void"
*''[[Level 26]]'' "The Space Ocean"
*''[[Level 27]]'' "Infinitopolis"
*''[[Level 28]]'' "The Dirt Cavern"
*''[[Level 29]]'' "Drowned School"
*[[Level 29.5|''Level 29.5'']] "Blue Forest"
*''[[Level 30]]'' "Disparity"
*''[[Level 31]]'' "Shipwreck"
*''[[Level 32]]'' "The Cruise"
*''[[Level 33]]'' "̧P͏ìll͢ars̛"
*''[[Level 34]]'' "Basalt Cavern"
*''[[Level 35]]'' "Walled City"
*''[[Level 36]]'' "The Metro"
*''[[Level 37]]'' "The Gateway"
* [[Level 39|''Level 39'']] "Dissonance"
*''[[Level 41]]'' "Portal Matrix"
*''[[Level 42]]'' "The Railway"
*''[[Level 43]]'' "Vertigo"
*''[[Level 44]]'' "Cold Islandia"
*''[[Level 45]]'' "The Pillars"
*''[[Level 46]]'' "Dead Church"
*''[[Level 47]]'' "Crimson Tunnels"
*''[[Level 48]]'' "Pylons"
*''[[Level 49]]'' "Swimming Pool"
*''[[Level 50]]'' "Creepspawn"
*''[[Level 51]]'' "The Lighthouses"
*''[[Level 52]]'' "the backroom"
*''[[Level 53]]'' "Folded Forest"
*[[Level 54|''Level 54'']] "Fractured Sea"
*[[Level 55|''Level 55'']] "The Forest"
*''[[Level 56]]'' "The Pizzaria"
*''[[Level 57]]''  "Flooded Basement"
*''[[Level 58]]'' "Flooding Cave"
*''[[Level 59]]'' "Construct"
*[[Level 60|''Level 60'']] ''"Isles of Blood"''
*''[[Level 61]]'' "Archive"
*''[[Level 62]]'' "Dark Cavern"
*''[[Level 63]]'' "Overgrown Reactor"
*''[[Level 64]]'' "Submarine Halls
*''[[Level 65]]'' "Courtyard"
*''[[Level 66]]'' "The Forgotten"
*''[[Level 67]]'' "Interconnected Asylum"
*''[[Level 69]]'' "French Square"
*''[[Level 106]]'' "Suburb street"
*''<s>[[Level 120]] "Misty Caves"</s>''    <sup><code>THIS LEVEL HAS BEEN REDACTED FROM THE SDSB BACKROOMS DATABASE</code></sup>
*''[[Level 333]]'' "Library of Wan Shi Tong"
*''[[Level 420]]'' "Winter Home"
*''[[Level 666]]'' "The Convention"
*[[Level -320410120023999212123123912399249923232.493|''Level -320410120023999212123123912399249923232.493'']] "In Between"
* [[Level -43922812245.1|''Level -43922812245.1'']] "Voidzone"
*''[[Level -43922812245.2]]'' "Borderzone"
*[[Level Fun|''Level Fun'']]
*[[Party Hub|''Party Hub'']]
*[[Level Happy!|''Level Happy!'']]
*[[Your Room|''Your Room'']]
*[[Trollge Containment Zone|''Trollge Containment Zone'']]
*[[Honeycomb Insulation|''Honeycomb Insulation'']]
*[[Level Joy!|''Level Joy!'']]
*[[A page with nothing in it|''A page with nothing in it'']]
*[[Level Boredom|''Level Boredom'']]
*''[[Level -42]]'' "Latina Nuclear Plant"
* ''[[Level -18]]'' "The Fountain of Death"
*''[[Level -2]]'' "Corrupted Passages"
*''[[Level -1]]'' "Brick Stairs"
*''[[Level -0]]'' "Flipped Reality"
* [[The End]]
* [[Gardenrooms]]
{{Dimension|image1=|caption-image1=New Frontier|Primary_Type=Locational Dimension|multiverse=[[Baseline Reality]]|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|parent_dimension=|average_reality_stability=68ξ|title1=The Outer Rooms}}
==The Outer Rooms System==
<code>''<big>Designation: Limsystem-002</big>''</code>


The Outer Rooms were a collection of several liminal spaces which existed until the MV209 event, which either destroyed them or eliminated all connections method to them.
=== Abstraction Principle ===
The Backrooms, by its nature, consists of reconstructions of locations within Baseline Reality which undergo a process known as "Reconstructive Abstraction". Every time a place is copied, it initially may resemble a much closer approximation to what it originally appeared as, though this begins to break down as the Backrooms copies its own copy in a repeating process. Over time, previously distinct looking locations converge into a uniform state where further Abstraction will not cause significant differences to the internal topography of the structure, thus changes become more visible on the periphery as regions which have not undergone extensive Abstraction may often resemble vastly different locations when compared to the anchor space, which is known as [[The Lobby]]. The Backrooms can feasibly reconstruct any location within Baseline Reality (how or why this is done remains unknown, especially whether or not it is a "conscious decision"), though it is  are most capable of recreating locations it intersects with as it is able to ascertain more information to recreate the location with higher accuracy than it would be able to otherwise, implying that distance is a factor in how evident Abstraction is. Beyond inanimate objects and locations, the Backrooms also known to rarely reconstruct [[Reconstructed Humans|animate matter]].  


===List of Sub-Spaces===
Liminal Systems are created when a Liminal Space (including those outside the Backrooms) undergoes sufficient abstraction as to have a clear infinite anchor space which has fully converged into a uniform state (even if it may still occasionally rearrange itself due to the perception principle), allowing for numerous other "Sub-Liminal-Spaces" to branch off of it as areas which have not undergone similar levels of abstraction split from one another while remaining physically connected to one another, though due to the size of Liminal Systems convenient transport is done via domestic Intersection Points where the System folds in on itself. As reconstruction is derived from Baseline Reality, Liminal Systems can be used as a method of travelling between locations in Baseline Reality even if distances are amplified considerably.
all of thesde are incomplete VVV
*[[New Frontier]]
*''[[Level 40]]'' "Doorway"
*''[[Level 38]]'' "Damp Hallway"
{{Dimension|title1=Living Rooms|Primary_Type=Locational Dimension|multiverse=[[Baseline Reality]]|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|average_reality_stability=68ξ}}
==Living Rooms System==
''<code><big>Designation: Limsystem-003</big></code>''


The Living Rooms is the first safe and stable Liminal System to be discovered, with the entrance found in a mansion located east of [[Alephitis]], [[Tritonien]].
=== Structure of the Backrooms ===
The Backrooms is known to be derived from two sources which coexist to give them form, with the first of said requirements being a (usually) enclosed enclosed physical location (usually tied to specific intersection points) which is then expanded as the template for an infinitely expansive space via the [[Noosphere]] of those perceiving said spaces as the sole source of information able to fill in the non-functional gaps left behind from the initial creation of the space. Access into the Backrooms is made possible via the previously explained 'Intersection Points' which make follow one of many types, with the most common types being one-way access points which allow access into the Backrooms but only offer access across the Backrooms itself when crossed, two-way access points where the entry and exit to-and-from the Backrooms remain tethered, and a rare type being seen in (Semi-)Transitional Spaces which act as a intermediary state between Baseline Reality and a standard Sub-Space which allows for access to-and-from both ends. All locations within the Backrooms aside from (Semi-)Transitional Spaces are wholly detached from their reality of origin with no physical interconnection beyond traversal.


=====List of Sub-Spaces=====
There are multiple types of locations one may encounter within the Backrooms and other '''Liminal Systems''', which are areas composed of multiple Liminal Spaces that have connect and amalgamated together into one cohesive structure which can be physically navigated thru from space-to-space, though travel is made much quicker via domestic Intersection Points, with each of these constituent Spaces within Systems referred to as '''Sub-Spaces'''<ref>Also known as "Levels" or "System Spaces"</ref> which typically appear in a ordinal layered placement as they are further or lesser abstracted forms of the 'first subspace' from which all others extend from as they reconstruct other realities, while '''Enigmatic Sub-Spaces''' which lack have an unknown abstraction point and sub-spaces too small to meet the requirements of a 'standard Liminal Space' being known as '''Micro-Spaces'''<ref>Also known as "Rooms"</ref>. '''Transitional Spaces'''<ref>Also known as "Middle Rooms" or "Thresholds"</ref> are Liminal Spaces which are located in a intermediary position between Reality and the Backrooms (or are otherwise separate Spaces interconnected with Reality) which allow for navigation between Reality and the Backrooms, though they may rarely take the form of a location in reality with liminal properties rather than a fully-developed intermediary space which are known as '''''Baseline-Type'' Semi-Transitional Spaces''', which are contrasted by '''''System-Type'' Semi-Transitional Spaces''' which are locations physically within reality but can only be accessed via the Backrooms and cannot be exited. Beyond Sub-Spaces which are clearly their own 'locations', many typically smaller Liminal Spaces known as '<nowiki/>'''Intra-Spaces'''<nowiki/>'<ref>Also known as "Sub-Levels"</ref> may be connected to a 'parent space' which are either wholly distinct despite their connection or a partially separated offshoot of their parent with one entrance (which are both either naturally created or are created via the artificial construction of enclosed physical locations being subject to "liminal properties" for extended periods of time), though some (known as '''Inter-Spaces'''<ref>Also known as "Sub-Layers".</ref>) may be connected to two Liminal Spaces rather than one in order to act as a bridge between the two.


*''[[The Hallways]] (Located within the mansion.)''
{{Hr}}
*[[The Diner|''The Diner'']]
*[[The Modern Lounge|''The Modern Lounge'']]
*[[The Garden|''The Garden'']]
*[[The Penthouse|''The Penthouse'']]
{{Dimension|title1=The Deep Rooms|Primary_Type=Locational Dimension|multiverse=Backrooms?|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|average_reality_stability=68ξ}}
==The Deeprooms==
''<code><big>Designation: Limsystem-004</big></code>''


In the year 209 a catastrophic event happened in the [[New Frontier]], [[Damp Hallway]] and [[Doorway]] limspaces, which were all once part of the Backrooms. The Event, which was named "MV209" ''("Multiverse '209")'' was caused by [[Fracture]] being completely healed, which simultaneously caused entrances to the three limspaces to stop working as intended. It is thought that they were completely, because all communications from [[SDSB]] operatives in the 3 levels cut approximately 18 minutes after the initial MV209 event. Following MV209, anyone who attempted to use the former entrances to these three levels would "Go somewhere deeper". Until the year 281, nothing was known about this "deeper" area. Until a full drone-investigation began into the area. It seems to be a system of enigmatic liminal spaces found deep down below underneath the entirety of the backrooms.
Each Sub-Space within the Backrooms is given a '[[:Category:Survival Difficulties|survival difficulty]]' warning which consolidates important information explaining how difficult it is to survive within it into 3 categories; Safety, Consistency, and Maladjustment.


The 'Deeprooms' are completely barren of native life/entities. Despite the lack of entities there is still a constant feeling of being watched.
* The safety of a Sub-Space may be classified as 'Safe' or 'Unsafe' depending on both environmental hazards and resource limitations alongside other factors which may affect survivability.
* The consistency of a Sub-Space may be classified as 'Consistent', 'Sporadic Consistency', and 'Inconsistent' depending consistent navigation without a perception range is (without which areas are subject to change in form) within the Space, which can be improved by 'measuring' them with string or markings.
* The maladjustment rate within a Sub-Space may be classified as 'No Maladjustment', 'Minimal Maladjustment', 'Low Maladjustment', 'Occasional Maladjustment', 'High Maladjustment', 'Critical Maladjustment', and 'Uncertain Maladjustment' depending on how prevalent "Liminal Maladjustment" is within the space, which refers to the culmination of numerous common psychological issues which being within the Backrooms may cause such as forgetfulness, dissociation, depersonalization, hallucinations, delusions, and paranoia.


===List of Sub-Spaces===
===List of Sub-Spaces===
wip
Beyond the Lobby, the following is a list of other Sub-Spaces that find themselves within the Backrooms System:
{| class="wikitable sortable article-table sortable" style="width:100%"
|+
!Interdimensional Index
!Nickname
!Liminal Type
!Present Groups
!Description
|-
|[[A Room with nothing in it|Dimension-Loc:4.5.001/5/197.0]]
|A Room with nothing in it
|Intra-Space
|
|A relatively small illuminated yellow room filled with levitating furniture that seemingly erases all memories of its existence if it is entered and then exited by an individual.
|-
|[[Antarctica (Liminal Space)|Dimension-Loc:4.2.001/5/151.4]]
|Antarctica
|Sub-Space
|
|A vast frozen over underground laboratory beneath a vast glacier-covered continent with occasional scientific outposts scattered across it.
|-
|[[Apartment Void|Dimension-Loc:4.2.001/5/151.11]]
|Apartment Void
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A seemingly infinite apartment complex with countless floors of straight hallways with occasional staircases that connect the floors found fairly frequently.
|-
|[[Archive|Dimension-Loc:4.2.001/5/281.3]]
|Archive
|Sub-Space
|
|A multi-layered circular library with hallways extending in every direction from the middle of each floor.
|-
|[[Back Alley|Dimension-Loc:4.5.001/5/283.1]]
|Back Alley
|Intra-Space
|
|A small urban neighbourhood within a forested environment.
|-
|[[Basalt Cavern|Dimension-Loc:4.2.001/5/155.0]]
|Basalt Cavern
|Sub-Space
|
|A connected hallway, maze, semi-flooded cavern, and a set of rooms that each share the common trait of being composed of basalt rock.
|-
|[[Dimension-Loc:4.2.001/5/144.15]]
|Blue Dreams
|Sub-Space
|
|A dark, flooded, and cold cavern. The cavern itself is constructed around of a strange material that constantly emits weeping noises and secretes human tears.
|-
|[[Blue Forest|Dimension-Loc:4.6.001/5/144.4]]
|Blue Forest
|Inter-Space
|
|A large underwater forest submerged in tens of meters of water reminiscent of both of its 'parent' sub-spaces.
|-
|[[Borderzone|Dimension-Loc:4.2.001/5/152.10]]
|Borderzone
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A infinitely long magenta-coloured hallway.
|-
|[[Brick Stairs|Dimension-Loc:4.2.001/5/152.4]]
|Brick Stairs
|Sub-Space
|
|A oversized staircase-like structure built out of bricks, taking the shape of a spiral of steps within a enclosed chamber.
|-
|[[Cold Islandia|Dimension-Loc:4.2.001/5/192.4]]
|Cold Islandia
|Sub-Space
|[[Backrooms Reorganized Explorer's Organization]]
|A large and distinct hill containing a village that is surrounded by a vast winter landscape full of boreal trees and shipwrecks.
|-
|[[Construct|Dimension-Loc:4.2.001/5/281.2]]
|Construct
|Sub-Space
|[[Backrooms Military Administration]]
|A small urban environment containing a couple buildings and various underground structures within a walled area.
|-
|[[Corrupted Passages|Dimension-Loc:4.2.001/5/152.6]]
|Corrupted Passages
|Sub-Space
|
|An unusual series of rooms, hallways, and other spaces which house several environmental hazards such as steep drops or lava.
|-
|[[Courtyard|Dimension-Loc:4.2.001/5/282.0]]
|Courtyard
|Sub-Space
|
|A series of irregularly-shaped courtyards and hallways composed of white-coloured concrete walls of unknown thickness with various windows built into them.
|-
|[[Crimson Tunnels|Dimension-Loc:4.2.001/5/192.8]]
|Crimson Tunnels
|Sub-Space
|
|A series of red-coloured rooms and hallways notable for having an unusual fleshy texture to them in most sections of the sub-space.
|-
|[[Creepspawn|Dimension-Loc:4.2.001/5/193.2]]
|Creepspawn
|Sub-Space
|
|A small town and museum that is entirely coated with an unusual fungal growth that poses a significant threat to human life.
|-
|[[Crush Depth|Dimension-Loc:4.2.001/5/144.16]]
|Crush Depth
|Sub-Space
|
|A oversized flooded house underneath a ice sheet. The house itself has a suburban design, and features a main house, a shed, and a garage.
|-
|[[Dead Church|Dimension-Loc:4.2.001/5/192.6]]
|Dead Church
|Sub-Space
|
|A large church building situated in a vast frozen, dead, and desolate field with the only notable structures or natural features within it beyond the church itself and various dead plants.
|-
|[[Dimension-Loc:4.2.001/5/144.8]]
|Decrepit Hospital
|Sub-Space
|
*[[Insurgency against Earthly Colonization of the Backrooms]]
*[[Secure-Defend-Subjugate Backrooms]]
|A abandoned-looking hospital within a vast boreal forest.
|-
|[[Disparity|Dimension-Loc:4.1/5/146.5]]
|Disparity
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A large winding cave system with its walls made out of a pitch black rock commonly covered in impossible massive spiderwebs festering with the native Golden Spiders and Slime Queen.
|-
|[[Dissonance|Dimension-Loc:4.6.001/5/144.7]]
|Dissonance
|Sub-Space
|[[Backrooms Military Administration]]
|A winding non-Euclidean maze of dimly-lit red-coloured corridors which while being harmless, are notable for inducing feelings of uneasiness and paranoia when alone.
|-
|[[Drowned School|Dimension-Loc:4.6.001/5/144.6]]
|Drowned School
|Sub-Space
|
*[[Secure-Defend-Subjugate Backrooms]]
*[[The Student's Union]]
|A flooded primary school. with a varying depth of roughly 1-2 meters of water submerging its floor with a couple exceptions such as the basement.
|-
|[[Electrical Station|Dimension-Loc:4.2.001/5/305.0]]
|Electrical Station
|Sub-Space
|
|A series of long twisting hallways with walls comprised of worn down bricks typically covered up by pipes and electrical components that occasionally lead to seemingly randomly placed rooms that contain various objects within them.
|-
|[[Fieldport|Dimension-Loc:4.5.001/5/284.0]]
|Fieldport
|Intra-Space
|[[City State of Infinitopolis]]
|A large airport located in a infinite featureless field, with the only other 'structure' of any kind being a long road that leads to and from Infinitopolis.
|-
|[[Flipped Reality|Dimension-Loc:4.5.001/5/152.5]]
|Flipped Reality
|Intra-Space
|
|A flipped and warped version of The Lobby, which it is directly connected to.
|-
|[[Flooded Basement|Dimension-Loc:4.2.001/5/281.1]]
|Flooded Basement
|Sub-Space
|
|A vast and winding basement complex consisting of storage rooms and countless kilometres of flooded tunnels typically in complete darkness.
|-
|[[Folded Forest|Dimension-Loc:4.2.001/5/195.0]]
|Folded Forest
|Sub-Space
|
|A vast forest which is mirrored into the sky.
|-
|[[Dimension-Loc:4.6.001/5/144.5]]
|Four Dimensions
|Inter-Space
|
|A incredibly unstable and warped environment taking the shape of a segmented sphere.
|-
|[[Fractured Forest|Dimension-Loc:4.6.001/5/216.1]]
|Fractured Forest
|Sub-Space
|
|A small dimly lit deciduous forest that is entirely enclosed by a barrier consisting of illuminated leaves from all directions.
|-
|[[Fractured Sea|Dimension-Loc:4.2.001/5/216.0]]
|Fractured Sea
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A large building that serves as a apartment complex and shopping centre situated within a vast sea of Fracture Weld which extends an unknown distance downwards from the front door.
|-
|[[French Square|Dimension-Loc:4.2.001/5/152.9]]
|French Square
|Sub-Space
|
|A urban market square surrounded by several apartment buildings, which notably are all labelled in French.
|-
|[[Gardenrooms|Dimension-Loc:4.2.001/5/321.0]]
|Gardenrooms
|Sub-Space
|
|A indoor garden surrounded by pristine white-coloured walls overlooking a infinite blue sky, with the varied interior environments containing various plants.
|-
|[[Gargantuans|Dimension-Loc:4.2.001/5/151.9]]
|Gargantuans
|Sub-Space
|
|An unusual realm that takes the form of two massive hundred-meter tall creatures engaging each other in a violent battle within a dark void which has been going on ever since the sub-space was first discovered.
|-
|[[Goliath|Dimension-Loc:4.2.001/5/151.8]]
|Goliath
|Sub-Space
|
*[[Goliath Crew]]
*[[Secure-Defend-Subjugate Backrooms]]
|A large airship-like vessel flying within a infinite dark void with several labelings across the vessel referring to it as the 'HMA Goliath'.
|-
|[[Heaven (Liminal Space)|Dimension-Loc:4.2.001/5/146.6]]
|Heaven
|Sub-Space
|
|A long ornate hallway. The hallway has countless windows on its sides, showing a view of a vast cloudy void. The Hallway seemingly goes on forever, as no one has ever managed to reach its end.
|-
|[[Hollow Iceberg|Dimension-Loc:4.2.001/5/151.6]]
|Hollow Iceberg
|Sub-Space
|
|A flooded frozen cavern.
|-
|[[Honeycomb Insulation|Dimension-Loc:4.2.001/5/192.3]]
|Honeycomb Insulation
|Sub-Space
|
|A long and winding attic space that seemingly surrounds [[The Lobby]].
|-
|[[Hotel Backrooms|Dimension-Loc:4.2.001/5/151.5]]
|Hotel Backrooms
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A large hotel complex situated in a coniferous forest, acting as a haven for travellers thanks to its replenishing resources, safety, and large number of hotel rooms (of which many act as apartments).
|-
|[[Hotel Fright|Dimension-Loc:4.2.001/5/374.1]]
|Hotel Fright
|Sub-Space
|
|An expansive hotel interior typically consisting of older interiors consisting of decorations and furniture from the first century AGS, with said furniture being in surprisingly good condition despite their age.
|-
|[[In Between|Dimension-Loc:4.2.001/5/154.0]]
|In Between
|Sub-Space
|
|A series of floating magenta-coloured 'islands' that float around freely in a void-like space.
|-
|[[Infinitopolis|Dimension-Loc:4.2.001/5/151.13]]
|Infinitopolis
|Sub-Space
|
*[[Backrooms Military Administration]]
*[[Backrooms Transport Agency]]
*[[City State of Infinitopolis]]
*[[Infinity College]]
*[[Secure-Defend-Subjugate Backrooms]]
|An infinite city home to countless homes, shops, restaurants, recreational activities, and everything else may expect to find in a major urban area.
|-
|[[Interconnected Asylum|Dimension-Loc:4.2.001/5/282.2]]
|Interconnected Asylum
|Sub-Space
|
|An unusual warped mental asylum, looping in on itself in a repetitive for several iterations until eventually coming to an end.
|-
|[[Dimension-Loc:4.2.001/5/144.3]]
|Inverted Reality
|Sub-Space
|[[Backrooms Reorganized Explorer's Organization]]
|A upside-down jungle.
|-
|[[Isles of Blood|Dimension-Loc:4.2.001/5/195.1]]
|Isles of Blood
|Sub-Space
|
|A group of two floating islands seemingly located above The Lobby. The trees, ground, and other structures within these islands are entirely composed of an unknown 'fleshy' substance.
|-
|[[Labyrinth|Dimension-Loc:4.2.001/5/315.0]]
|Labyrinth
|Sub-Space
|
|A vast labyrinth with roughly 16 metre tall walls and frozen floors, being notable for its isolated and cold atmosphere.
|-
|[[Latina Nuclear Plant|Dimension-Loc:4.3.001/5/192.1]]
|Latina Nuclear Plant
|Transitional Space
|[[SDS Foundation]]
|A vast partially destroyed nuclear powerplant surrounded by forests and additional structures that could be found next to such a structure.
|-
|[[Level Boredom|Dimension-Loc:4.5.001/5/200.0]]
|Level Boredom
|Intra-Space
|
|A 25x25 Meter dark gray room consisting of a rubber-like substance.
|-
|[[Level Fun|Dimension-Loc:4.2.001/5/144.10]]
|Level Fun
|Sub-Space
|
|A vast labyrinth-like soft play area home to various hazards such as topographic abnormalities and hostile entities.
|-
|[[Library of Wan Shi Tong|Dimension-Loc:4.2.001/5/155.1]]
|Library of Wan Shi Tong
|Sub-Space
|
|A large five-floored library containing knowledge of countless magical abilities, specifically pertaining to Hecatian Magical Art.
|-
|[[Lonely Road|Dimension-Loc:4.2.001/5/146.0]]
|Lonely Road
|Sub-Space
|[[Backrooms Military Administration]]
|A long, dark, and gloomy road. This road traverses through the entire subspace, beginning in a road tunnel in its south end, and continuing through the dark landscape, and eventually transitioning into [[The Maple Forest]].
|-
|[[Misty Caves|Dimension-Loc:4.2.001/5/158.0]]
|Misty Caves
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A long, misty cavern that extends for a vast distance until reaching a series of [[SDSB]] installations used for containing high-threat entities.
|-
|[[Neverending Concrete|Dimension-Loc:4.2.001/5/144.17]]
|Neverending Concrete
|Sub-Space
|
*[[Secure Defend Subjugate Backrooms]]
*[[United Backrooms Trade Organization]]
*[[Backrooms Reorganized Explorer's Organization]]
|A vast labyrinth of concrete rooms, hallways, and chambers. Neverending Concrete is among one of the larger known Liminal Spaces, as its varying concrete rooms seemingly go on and on in every direction.
|-
|[[Dimension-Loc:4.2.001/5/144.9]]
|Neverending Staircase
|Sub-Space
|
|A vast stone staircase with a collection of boiler rooms at the top.
|-
|[[Orphanage|Dimension-Loc:4.2.001/5/283.0]]
|Orphanage
|Sub-Space
|
|A fairly large wooden orphanage home to a large eating area, library, kids play area, a basement, various class rooms, various sleeping areas, and a largely unexplored attic.
|-
|[[Overgrown Reactor|Dimension-Loc:4.2.001/5/281.5]]
|Overgrown Reactor
|Sub-Space
|
|A large nuclear powerplant that appears to be abandoned, with various structural damages and overgrowths in the form of vines or other plants coating the building.
|-
|[[Pillars|Dimension-Loc:4.2.001/5/159.0]]
|Pillars
|Sub-Space
|Cultists
|A series of dark rooms filled with mentally hazardous pillars which is accessed via a elevator room with two accessible floors.
|-
|[[Portal Matrix|Dimension-Loc:4.2.001/5/167.0]]
|Portal Matrix
|Sub-Space
|
*[[Secure-Defend-Subjugate Backrooms]]
*[[SDS Foundation]]
|A series of 'futuristic' corridors, tunnels, and rooms centred around a large portal complex utilised for interdimensional travel.
|-
|[[Pylons|Dimension-Loc:4.2.001/5/193.0]]
|Pylons
|Sub-Space
|
|A series of pylons and towers situated in a vast sea of an unidentified liquid metal notable for its conductive properties.
|-
|[[School Halls|Dimension-Loc:4.2.001/5/374.3]]
|School Halls
|Sub-Space
|
|A vast winding "maze" of high school hallways with occasional small classrooms and other school-typical rooms accessible thru doors along its walls.
|-
|[[Shipwreck|Dimension-Loc:4.2.001/5/152.7]]
|Shipwreck
|Sub-Space
|
|A series of shipwrecks situated within a turbulent sea notable for its strange 'bowl'-like currents.
|-
|[[Submarine Halls|Dimension-Loc:4.2.001/5/281.6]]
|Submarine Halls
|Sub-Space
|
*[[Backrooms Reorganized Explorer's Organization]]
*[[Secure-Defend-Subjugate Backrooms]]
|A winding labyrinth of concrete and metal hallways (depending on where you are) that resemble those found on a submarine.
|-
|[[Suburb Street|Dimension-Loc:4.2.001/5/152.1]]
|Suburb Street
|Sub-Space
|
|A seemingly infinite suburban neighbourhood in a state of perpetual night that spreads out in every direction.
|-
|[[Swimming Pool|Dimension-Loc:4.2.001/5/193.1]]
|Swimming Pool
|Sub-Space
|[[Swim Team]]
|A white-coloured swimming centre located within a vast void, with both the exterior of the building and the pools themselves extending an infinite distance downwards.
|-
|[[the backroom|Dimension-Loc:4.5.001/5/195.2]]
|the backroom
|Intra-Space
|
|a 5x5 meters white room (four walls, ceiling, floor) with window, chair, fan and door.
|-
|[[The Cave|Dimension-Loc:4.2.001/5/281.4]]
|The Cave
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A vast cavern containing both thinner tunnels and massive open chambers.
|-
|[[Dimension-Loc:4.2.001/5/144.2]]
|The Chasm
|Sub-Space
|
*[[Secure-Defend-Subjugate Backrooms]]
*[[Chasmic Urban Development Organization]]
*[[Backrooms Military Administration]]
*[[Backrooms Transport Agency]]
|A massive canyon or trench made out of grey rock, with several additional canyons which extend out of its edges into other directions.
|-
|[[The Convention|Dimension-Loc:4.2.001/5/152.2]]
|The Convention
|Sub-Space
|[[Furry Squad]]
|A vast convention building featuring rooms such as panel rooms and market halls, which are all supposedly intended for Furries.
|-
|[[Dimension-Loc:4.2.001/5/144.13]]
|The Crooked House
|Sub-Space
|
*[[Crooked-House Inhabitants]]
*[[Backrooms Military Administration]]
*[[Backrooms Reorganized Explorer's Organization]]
|A vast oversized house slightly tilted to its side, alongside various hidden rooms below it. The Crooked House section is the only populated and properly explored one, as the underground rooms have so far mostly been avoided by the pre-established populace to avoid unneeded risks.
|-
|[[The Cruise|Dimension-Loc:4.2.001/5/152.8]]
|The Cruise
|Sub-Space
|
|A large cruise ship within a seemingly infinite sea.
|-
|[[Dimension-Loc:4.2.001/5/144.11]]
|The Dark Forest
|Sub-Space
|
|A dark muddy forest trapped in perpetual night time.
|-
|[[Dimension-Loc:4.2.001/5/144.12]]
|The Dark World
|Sub-Space
|[[The Darkened]]
|A long, dark, and enclosed pathway. Most of the pathway is structured around steep cliffs and drops.
|-
|[[The Darkness|Dimension-Loc:4.2.001/5/374.0]]
|The Darkness
|Liminal System
|
|A vast labyrinth shrouded in complete darkness, with no light permeating within the sub-space and all light sources becoming dysfunctional upon entry.
|-
|[[The Desert|Dimension-Loc:4.2.001/5/312.0]]
|The Desert
|Sub-Space
|[[Community of New Alshqati]]
|A vast expansive desert consisting of sand dunes. The further you travel the smaller the dunes become until becoming flat, making such areas habitable due mild temperatures and aquifers.
|-
|[[The Edge|Dimension-Loc:4.2.001/5/151.1]]
|The Edge
|Sub-Space
|[[The Wonderland]]
|A small forest facing a steep cross section of a forested field, which if climbed or crossed thru (via caves) will lead one to a highly cognitohazardous area which is not advised to be entered.
|-
|[[The End|Dimension-Loc:4.2.001/5/284.1]]
|The End
|Sub-Space
|
|A large pale-yellow library in a state of varying quality, with certain regions being relatively clean and others being visibly derelict.
|-
|[[Dimension-Loc:4.2.001/5/146.4]]
|The Facility
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A large and futuristic generator complex, which allegedly acts as one of the locations that powers the entire Backrooms' power network. The accessible environments are countless floors of circular hallways surrounding 4 large empty spaces which have the energy from the reactor blasting through them.
|-
|[[The Forgotten|Dimension-Loc:4.2.001/5/282.1]]
|The Forgotten
|Sub-Space
|
|A wooden mansion devoid of any light sources situated within a field that shares a similar darkness.
|-
|[[The Fountain of Death|Dimension-Loc:4.5.001/5/151.1]]
|The Fountain of Death
|Intra-Space
|
|A dark stone fountain with unusual properties within a blue-coloured boreal forest.
|-
|[[The Fountain of Youth|Dimension-Loc:4.2.001/5/151.0]]
|The Fountain of Youth
|Sub-Space
|
|A ornate white fountain with unusual effects located in a small forest with red-coloured trees akin to those found in The Maple Forest, although much denser.
|-
|[[The Gateway|Dimension-Loc:4.2.001/5/160.1 ]]
|The Gateway
|Sub-Space
|
|A long dark tunnel with various floating skyscrapers flying through it at varying speeds, with some flying rapidly and some moving more slowly and safely.
|-
|[[The Lighthouses|Dimension-Loc:4.2.001/5/193.3]]
|The Lighthouses
|Sub-Space
|
|A collection of 25 lighthouses assembled into a square formation within a vast ocean, which unlike many other oceanic sub-spaces is potable and safe.
|-
|[[Dimension-Loc:4.2.001/5/144.1]]
|The Lobby
|Sub-Space
|
*[[Backrooms Reorganized Explorer's Organization]]
*[[Backrooms Military Administration]]
*[[Secure-Defend-Subjugate Backrooms]]
|A infinite empty office building with a seemingly infinite number of segmented rooms and corridors nearly universally covered in dull-yellow wallpaper and moist tight-nit carpets that acts as the overarching structure from which all other iterations of itself (which are the other Sub-Spaces) extend from due to acting as the source of reconstructive abstraction.
|-
|[[The Maple Forest|Dimension-Loc:4.2.001/5/146.1]]
|The Maple Forest
|Sub-Space
|
*[[Backrooms Military Administration]]
*[[Secure-Defend-Subjugate Backrooms]]
*[[Silvanus]]
|A long road going through the middle of a blood-red forest. It is considered entirely habitable and rich with various resources, because of which it is considered one of the most favourable places in the entire Backrooms for one to reside.
|-
|[[The Metro|Dimension-Loc:4.2.001/5/160.0]]
|The Metro
|Sub-Space
|
|A vast maze of metro tunnels that contain networks of railways that typically lead to different sub-spaces after a long period of travel.
|-
|[[The Mist|Dimension-Loc:4.2.001/5/146.2]]
|The Mist
|Sub-Space
|
|A large, misty crater. This crater is surrounded by vast stone walls which seemingly go on forever. The most notable feature of the crater is the vast layer of grey mist.
|-
|[[The Office|Dimension-Loc:4.2.001/5/305.1]]
|The Office
|Liminal System
|
*[[Backrooms Reorganized Explorer's Organization]]
*[[Secure-Defend-Subjugate Backrooms]]
|A mostly (but not entirely) empty office building with white walls, gray carpets, and numerous blacked out windows.
|-
|[[The Outskirts|Dimension-Loc:4.5.001/5/301.0]]
|The Outskirts
|Sub-Space
|[[City State of Infinitopolis]]
|A expansive coniferous forest home to countless small towns, villages, and other assorted structures connected to one another via long rural roads or small footpaths going throughout the forest.
|-
|[[The Parkade|Dimension-Loc:4.2.001/5/374.2]]
|The Parkade
|Sub-Space
|
|A seemingly infinite indoor multi-story carpark that mainly contains various cars, full shopping carts, and the occasional staircase leading between floors.
|-
|[[The Pillars|Dimension-Loc:4.2.001/5/146.7]]
|The Pillars
|Sub-Space
|
|A series of vast many kilometre long pillars situated within a dark void.
|-
|[[The Pizzeria|Dimension-Loc:4.5.001/5/281.0]]
|The Pizzeria
|Intra-Space
|
|A large abandoned pizza establishment, with many areas either seemingly left as they were and other areas completely emptied out.
|-
|[[The Poolrooms|Dimension-Loc:4.2.001/5/306.0]]
|The Poolrooms
|Sub-Space
|
|A vast complex of interconnected rooms and corridors partially submerged in lukewarm water, being far too large to properly serve the function of a pool
|-
|[[The Railway|Dimension-Loc:4.2.001/5/183.0]]
|The Railway
|Sub-Space
|[[Backrooms Reorganized Explorer's Organization]]
|A rural railway with countless small villages, towns, and farms along the railway.
|-
|[[The Sea|Dimension-Loc:4.2.001/5/312.1]]
|The Sea
|Sub-Space
|
*[[SDS Foundation]]
*[[Free State of Mei'ra-in-Exile]]
|A seemingly infinite ocean, stretching for an unknown distance in all directions.
|-
|[[Dimension-Loc:4.2.001/5/144.14]]
|The Sewer
|Sub-Space
|
|A large sewer system filled with countless sharp corners, drops, sewagefalls<ref>Waterfalls, but sewage water.</ref>, and occasional flooded areas. '
|-
|[[The Space Ocean|Dimension-Loc:4.2.001/5/151.12]]
|The Space Ocean
|Sub-Space
|
|A vast underground sea within a cavern composed of concrete filled with countless flora and fauna and occasional air-filled caves.
|-
|[[The Train|Dimension-Loc:4.5.001/5/151.3]]
|The Train
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|A seemingly infinitely long train situated in an avenue of coniferous trees and a leafy perimeter wall. Each of the carriages within the Train are largely identical with rows of seats, windows, and red walls.
|-
|[[Timeline Island|Dimension-Loc:4.2.001/5/151.10]]
|Timeline Island
|Sub-Space
|[[Secure-Defend-Subjugate Backrooms]]
|Two small islands within a vast sea surrounded by a barrier preventing further exploration. The islands are notable for seemingly shifting dimensions at random intervals, taking all those that are on them with them.
|-
|[[Truffle Cavern|Dimension-Loc:4.2.001/5/151.7]]
|Truffle Cavern
|Sub-Space
|[[Truffle Diarchy]]
|A large cavern coated with a thick mat of blue mycelium, with occasional bioluminescent spots lighting up the mushroom-filled cavern. Countless large mushrooms grow out of the ground, which is flooded with a few meters of water.
|-
|[[Vertigo|Dimension-Loc:4.2.001/5/192.0]]
|Vertigo
|Sub-Space
|
|A massive white apartment complex situated within a vast, dense fog that surrounds the base of the apartment complex.
|-
|[[Voidzone|Dimension-Loc:4.2.001/5/152.0]]
|Voidzone
|Sub-Space
|[[Insurgency against Earthly Colonization of the Backrooms]]
|A chaotic assortment of connected rooms which often house common themes of magenta-coloured walls or unusual messaging, being by far one of the most unusual locations to be discovered within the Backrooms.
|-
|[[Walled City|Dimension-Loc:4.2.001/5/158.1]]
|Walled City
|Sub-Space
|
|A large city consisting of crude structures surrounded by a hollow wall of stone.
|-
|[[Wheat Field|Dimension-Loc:4.2.001/5/324.0]]
|Wheat Field
|Sub-Space
|[[SDS Foundation]]
|A seemingly infinite pasture of wheat, varying from vast boundless fields to smaller plots divided by trees and other flora.
|-
|[[Winter Home|Dimension-Loc:4.2.001/5/192.7]]
|Winter Home
|Sub-Space
|
|A house on a small island covered in a thick layer of snow situated within a vast ice cold sea.
|-
|[[Dimension-Loc:4.5.001/5/192.5]]
|Yellow Land
|Intra-Space
|
|A hilled forest landscape with several lakes, although completely composed of the materials in [[The Lobby]]'s walls and floor.
|-
|[[Your Room|Dimension-Loc:4.2.001/5/151.14]]
|Your Room
|Sub-Space
|
|A endless white voice upon entry, which then grants all who enter it the ability to create and display anything within it, with the only limit being their imagination.
|}
 
== Other Liminal Systems ==
''Beyond the large and expansive Backrooms System, various other smaller Liminal Systems disconnected from the Backrooms are known to exist.''
<tabber>
|-|The Outer Rooms System (Limsystem-002)=
{{Container6|header=The Outer Rooms|body={{Dimension|image1=|caption-image1=New Frontier|Primary_Type=Locational Dimension|multiverse=[[Baseline Reality]]|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|parent_dimension=|average_reality_stability=68ξ|title1=The Outer Rooms|interdimensional index=Dimension-Loc:4.1/5/153.0|primary type=Locational Dimension|dimensional form=Unreality|locational subtype=Liminal Space|liminal subsubtype=Liminal System|average reality stability=68ξ}}
The Outer Rooms were a collection of several liminal spaces which existed until the MV209 event, which either destroyed them or eliminated all connections method to them.


==Solitary Liminal Spaces==
=====List of Sub-Spaces=====
Solitary Liminal Spaces are are independent and not considered part of a Liminal System. They are often isolated and solitary by nature.
*[[Damp Hallway]]
*[[Doorway]]
*[[New Frontier]]
}}
|-|Living Rooms System (Limsystem-003)=
{{Container6|header=Living Rooms|body={{Dimension|title1=Living Rooms|Primary_Type=Locational Dimension|multiverse=[[Baseline Reality]]|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|average_reality_stability=68ξ|image1=|interdimensional index=Dimension-Loc:4.1/5/174.0|primary type=Locational Dimension|dimensional form=Unreality|locational subtype=Liminal Space|liminal subsubtype=Liminal System|average reality stability=68ξ|present groups=[[Diner Staff]]}}
The Living Rooms is the first safe and stable Liminal System to be discovered, with the entrance found in a mansion located east of [[Alephitis]], [[Tritonien]].


===List of Solitary Liminal Spaces ===  
=====List of Sub-Spaces=====
 
*[[The Hallways]] (Located within the mansion.)
*[[The Diner]]
*[[The Modern Lounge]]
*[[The Garden]]
*[[The Penthouse]]
}}
|-|The Deeprooms (Limsystem-004)=
{{Container6|header=The Deeprooms|body={{Dimension|title1=The Deep Rooms|Primary_Type=Locational Dimension|multiverse=Backrooms?|dimensional_form=Space-Time|locational_sub-type=Liminal Space|liminal_sub-sub-types=Liminal System|average_reality_stability=68ξ|interdimensional index=Dimension-Loc:4.1/5/281.0|primary type=Locational Dimension|dimensional form=Unreality|locational subtype=Liminal Space|liminal subsubtype=Liminal System|average reality stability=68ξ}}
In the year 209 a catastrophic event happened in the [[New Frontier]], [[Damp Hallway]] and [[Doorway]] limspaces, which were all once part of the Backrooms. The Event, which was named "MV209" ''("Multiverse '209")'' was caused by [[Fracture]] being completely healed, which simultaneously caused entrances to the three Liminal Spaces to stop working as intended. It is thought that they were completely, because all communications from [[SDSB]] operatives in the 3 levels cut approximately 18 minutes after the initial MV209 event. Following MV209, anyone who attempted to use the former entrances to these three levels would "Go somewhere deeper". Until the year 281, nothing was known about this "deeper" area. Until a full drone-investigation began into the area. It seems to be a system of enigmatic liminal spaces found deep down below underneath the entirety of the backrooms.
 
The 'Deeprooms' are completely barren despite a constant feeling of being watched.
}}
|-|Solitary Liminal Spaces=
{{Container6|header=Solitary Spaces|body=
Solitary Liminal Spaces are independent Liminal Spaces which are not connected to any larger System, making them often much more isolating due to the lack of transition to other "landscapes". The following is a list of such spaces:


*[[Realm of the Forgotten|''Realm of the Forgotten'']] [''<code>Designation: Limspace-000</code>''<code>]</code>
*[[Realm of the Forgotten|''Realm of the Forgotten'']] [''<code>Designation: Limspace-000</code>''<code>]</code>
 
}}
==Phenomena==
</tabber>
==Phenomena within Liminal Spaces==
There are a plethora of strange, unexplainable occurrences which occur within Liminal Spaces - unexplained, unnatural occurences that are typically not fully understood. These are known for defying the laws of physics, pushing the bounds of ideas such as time and euclidean geometry, bending reality as we know it. As these phenomena can include a wide array of inexplicable events, it is advised to use caution when exploring sub-spaces that are unexplored or poorly understood.
There are a plethora of strange, unexplainable occurrences which occur within Liminal Spaces - unexplained, unnatural occurences that are typically not fully understood. These are known for defying the laws of physics, pushing the bounds of ideas such as time and euclidean geometry, bending reality as we know it. As these phenomena can include a wide array of inexplicable events, it is advised to use caution when exploring sub-spaces that are unexplored or poorly understood.
<tabber>
<tabber>
|-|Fracture=
{{Container6|header=Fracture
|body=
Fracture was a mysterious affliction present within the Backrooms since the creation of the [[Level 41|exit portals]] - whom had supposedly been causing levels to act unusually and hinder domestic Intersection Points. More common theories on why this was occurring was due to the portals 'tugging' on the Backrooms as a whole, although this was never proven. Fracture was eventually repaired after a large deposit of [[Fracture Weld]] was discovered.
}}
|-|Nihilantis Effect=
|-|Nihilantis Effect=
{{Container|body=
{{Container6|header=Nihilantis Effect
|body=
[[File:nihilantiseffect.png|thumb|253x253px|An example of the Nihilantis effect taking place in the [[Decrepit Hospital]]. The red-shifting may or may not be a result of the reflection of light around the object due to repulsitivity, however this may also be partly attributed to the effect itself.]]
[[File:nihilantiseffect.png|thumb|253x253px|An example of the Nihilantis effect taking place in the [[Decrepit Hospital]]. The red-shifting may or may not be a result of the reflection of light around the object due to repulsitivity, however this may also be partly attributed to the effect itself.]]
The Nihilantis Effect is a strange phenomenon caused by excessive duplication. It is estimated that it happens once in every 2500 duplications, but research shows it can be made artificially, given enough energy.
The Nihilantis Effect is a strange phenomenon caused by excessive duplication. It is estimated that it happens once in every 2500 duplications, but research shows it can be made artificially, given enough energy.


Utilising replication technology can be an arduous task in Liminal Spaces due to the Nihilantis effect, which is a strange phenomenon that causes some duplicated items to appear as if the viewer had double vision. This duplicate object can be interacted with, however it adheres to different laws of physics. Instead of having attractive gravity (although extremely small given the density, this can vary,) it obeys the laws of antigravity, and instead it repulses matter. Again, this effect is not visible to the naked eye or even microscopes, but an object with large enough density could almost certainly have visible properties. The atoms of the object, when inspected, are consisted out of antiprotons and antineutrons, which are made out of antiquarks, (and even very rarely, strange and charm quarks in their normal variant)with a nucleus orbited by positrons. As it is further investigated, the anti-object shows mostly opposite traits to normal objects. However, the SDSB is researching the qualities of the anti-objects caused by the Nihilantis effect, and are yet to discover whether the anti-object has negative mass. Currently, their weighing scales only show it as either positive or even 0, propagating this theory. If proven to be true, it becomes a good candidate for the hypothesised 'exotic matter,' which demonstrates strikingly similar properties.
Utilising replication technology can be an arduous task in Liminal Spaces due to the Nihilantis effect, which is a strange phenomenon that causes some duplicated items to appear as if the viewer had double vision. This duplicate object can be interacted with, however it adheres to different laws of physics. Instead of having attractive gravity (although extremely small given the density, this can vary,) it obeys the laws of antigravity, and instead it repulses matter. Again, this effect is not visible to the naked eye or even microscopes, but an object with large enough density could almost certainly have visible properties. The atoms of the object, when inspected, are consisted out of antiprotons and antineutrons, which are made out of antiquarks, (and even very rarely, strange and charm quarks in their normal variant)with a nucleus orbited by positrons. As it is further investigated, the anti-object shows mostly opposite traits to normal objects. However, the SDSB is researching the qualities of the anti-objects caused by the Nihilantis effect, and are yet to discover whether the anti-object has negative mass. Currently, their weighing scales only show it as either positive or even 0, propagating this theory. If proven to be true, it becomes a good candidate for the hypothesised 'exotic matter,' which demonstrates strikingly similar properties.
}}
|-|The Barrier=
{{Container6|header=The Barrier
|body=
"The Barrier" is a largely unknown phenomenon that takes the form of an impassible "wall" that can be encountered in some regions of the Backrooms, making crossing it incredibly difficult. There are several unusual and chaotic sub-spaces within The Barrier such as the [[Borderzone]], [[In Between]], and the [[Voidzone]]. Through these sub-spaces entrances to [[The Outer Rooms]] were at one point found, though these no longer work.}}
|-|Unraveling Cascade=
{{Container6|header=Unraveling Cascade
|body=
The "Unraveling Cascade" is a hypothetical scenario in which a specific and hazardous enough Castrovalence Anomaly manages to initiate a run-away chain of Liminal Space formations akin to false vacuum decay, slowly spreading out as the entirety of the universe is consumed by Liminal Spaces one by one as it is reshaped into an interconnected mess of countless infinitely-sized spaces representing each individual room which had existed in the past. The feasibility of this scenario happening is uncertain, but largely thought to be incredibly unlikely.}}
|-|Entity Sightings=
{{Container6|header=Entity Sightings|body=
There have been many reports of unusual lifeforms seemingly native to Liminal Spaces with their own motivations, abilities, behaviours, habitats, and physiological needs including wholly alien lifeforms created to inhabit the environments they exist in and lifeforms who act as reconstructions of Humans which aim to mimic their appearance, though due to the frequency of Liminal Maladjustment and the lack of extensive evidence few "entities" have been verified to exist.
'''A list of commonly reported "entities" include;'''
*[[:Category:Amorphoid Species|Amorphous]]
**[[Black Goo]]
**[[The Creep]]
*[[Angels]]
**[[Nuntius]]
**[[Ultor]]
*[[:Category:Species|Animal-like]]
**[[Broodling]]
**[[Gravites]]
*[[Human]] [[:Category:Metamorphic Species|Mimics]]
**[[Crew]]
***[[Maintenance]]
**[[Faceless People]]
**[[SDS-027 "The Latina Ravager"|Latina Ravager]]
**[[Neighbor]]
**[[Purities]]
**[[Reconstructed Humans]]
*[[Lesser Spirits]]
**[[Wan Shi Tong]]
**[[Knowledge Gatherer]]
**[[Mirages]]
}}
|-|Objects=
{{Container6|header=Objects|body=
Many similar objects with a myriad of functions have been found within Liminal Spaces, ranging from tools, weapons, consumables, or other items. Many of these follow the rules of their reality, being found as mere decorations for individual Liminal Spaces, while others are real-world objects altered by a Limspace upon entry, and some are even created by the people who reside within Liminal Spaces. Some may be dangerous, while others may be crucial for survival - thus identification of objects is extremely important if one wishes to make use of them.
'''A list of documented objects includes:'''
*[[Brood Repellent]]
*[[Fracture Weld]]
*[[Golden Syrup]]
*[[Maple Syrup]]
*[[Noclipper]]
*[[Rift Projector]]
}}
}}
</tabber>
</tabber>
==Entities==
The term "entity" - originally a colloquial term originating from the days before the [[Secure-Defend-Subjugate Backrooms]] - covers a wide variety of beings, from friendly, sapient inhabitants, to mindless beasts, to creatures whose motivations and abilities are beyond our understanding. Each entity has unique behaviors, inhabitats, and physiological needs, often making them very unpredictable<ref>Atleast compared to wildlife from Baseline Reality</ref>. When in doubt, it is advised to avoid disturbing them, for both your and their safety.
In general, an "Entity" can refer to anything that lives in the Backrooms.
=====List of Entities=====
*[[Black Goo|''Black Goo'']]
*''[[Broodling]]''
*''[[Crew]]''
*''[[Gravites]]''
*''[[Knowledge Gatherer]]''
*''[[Maintenance]]''
*''[[Mirages]]''
*''[[Neighbor]]''
* ''[[Nuntius]]''
*''[[Purities]]''
*''[[The Creep]]''
*''[[Trollge]]''
*''[[Ultor]]''
*''[[Wan Shi Tong]]''
===Enigmatic Entities===
"Enigmatic Entities" are a specific sub-group of entities capable of widespread destruction or instability, often having wide-reaching implications to reality as a whole. Most enigmatic entities are dangerous and unpredictable, though a rare few are more benevolent and cooperative. Most possess unique, often 'anomalous' properties and behaviours which are yet to be understood or explained.
*wip
==Objects==
Objects are tools, weapons, consumables, or other items used or found by the inhabitants of Liminal Spaces. Many of these follow the rules of their reality, being found as mere decorations for individual Limspaces, while others are real-world objects altered by a Limspace upon entyy, and some are even created by the myirad of people who reside within Limspaces. Some may be dangerous, while others may be crucial for survival - thus identification of objects is extremely important if one wishes to make use of them.
===List of Objects===
*''[[Brood Repellent]]''
*[[Fracture Weld|''Fracture Weld'']]
*[[Golden Syrup|''Golden Syrup'']]
*[[Maple Syrup|''Maple Syrup'']]
*''[[Noclipper]]''
*[[Rift Projector|''Rift Projector'']]
==Groups==
Countless organizations or groups have forged their existence in a myriad of liminal spaces. Groups have their particular objectives and justifications for which they are developed. Factions, groups, and organizations can be varied, including varieties such as; task groups, command groups, religious groups, and many others.
===List of Groups===
''[[List of Groups#Liminal Spaces|See Group List Page]]''
{{LiminalNavbox}}
{{LiminalNavbox}}
[[Category:Backrooms]]
[[Category:Backrooms]]

Latest revision as of 00:59, 11 June 2026

Backrooms
Aliases
Nicknames
  • Backrooms
  • Liminality
  • Liminal Space
Inter-dimensional IndexDimension-Loc:4.1/5/141.0
Dimensional Information
Primary TypeLocational
MultiverseBackrooms
Dimensional FormUnreality
Locational Sub-TypeLiminal Space
Liminal Sub-Sub-TypeLiminal System
Child Dimension(s)See "List of Sub-Spaces" Section
Average Reality Stability68ξ
Topographical Information
Hazards
  • Mental Hazards
  • Native Beings
  • Environmental Hazards
Demographic Information
Population~9.73 Million (Documented Individuals, Actual population is unknown.)
Notable Inhabitants
Native SpeciesSee "Entity Sightings" Section
Immigrated Species
Political Information
Present GroupsSee "List of Groups" Section
Navigational Information
Discovered in
  • 16127 BGS (First Encountered by Humanity)
  • 141 (First Documented in Common Era)
Accessible by
  • Being unlucky, and noclipping out of reality into it. (A small, yet random chance of being sent there)
  • Intentional accessing via constructed portals
Interconnectivity Variable (To Yata's Dimension)8/10

The Backrooms[1] is an Extradimensional Space (or more accurately an amalgamation of many such spaces) that autonomously synthesizes and arranges matter to form imperfect copies of existing physical structures within other realities (which are arranged into a series of interconnected 'locations' known as Sub-Spaces[2]) as well as copies of the copies it has already copied, which are further supplemented with information gathered from the minds[3] of the beings within it (mainly to fill in the gaps caused by things which don't function). Functionally it is a materially physical "dimension" which can be interacted with as if it was tangible location despite possessing various inconsistencies in how reality 'functions' within it, causing it to be an exceptionally unstable place where the laws of physics and nature and even ones own perception cannot be safely relied upon if one were to enter it either intentionally or accidentally via an Intersection Point. Beyond the Backrooms, there are many other smaller Liminal Spaces which also gradually arrange themselves into Systems (much like the Backrooms).

The Backrooms' most notable Sub-Space is known as "The Lobby", a labyrinthine structure consisting of mostly empty segmented rooms and corridors covered in dull-yellow wallpapers and moist tight-nit carpets acting as the overarching structure from which all other iterations of the Backrooms (which are the other Sub-Spaces) extend from as the process of reconstructing locations gradually coalesces into the uniformity of the Lobby at the middle of everything, though despite its susceptibility to structural alternations when not measured or perceived its relative monotony has allowed it to be the most easily accessible and largest location within the Backrooms (especially as nearly all individuals which enter the Backrooms arrive there). Accessing other Sub-Spaces at different degrees of abstraction is typically done via conventionally accepted entry points (such as a doors, elevators, or hallways) or can only be accessed from domestic Intersection Points. It is not understood how the Sub-Spaces are 'positioned' in relation to one another, though studies into the subject are ongoing.

The Backrooms topographically consists of various distorted, infinite[4], non-euclidean environments which invoke feelings of uncanny familiarity, eeriness, nostalgia, and apprehension upon those who end up within them, usually resembling enclosed transitory rooms/environments familiar to Humans, though as all of the structures within the Backrooms are synthetic in some form even places which would appear to have flora or life have a very fake feeling. The most common theme seen in locations within the Backrooms is an empty caricature of a familiar place or environment derived from the space's "source", often being transitional in some form, such as hallways, waiting rooms, parking lots and rest stops which have been stripped of many defining characteristics, though many other kinds of locations have been discovered that simply take the form of places that are simply nostalgic, dreamlike, and/or uncanny, with the absence of people becoming their only unifying trait. While many traits are associated with the Backrooms which may be used to determine how exactly it behaves and acts with the scientific method, the only absolute that can be relied upon is that more often than not there is no logic or meaning behind certain structures and properties within the Backrooms.

The Backrooms exists at the infinite-points where "Baseline Reality" converges with Unreal Space, a 'state of non-existence' located on the periphery between things that exist and things that don't exist), in a way which leads to the laws of physics of the places it is derived from clashing or becoming non-functional. Living beings from standard realities may accidentally enter the Backrooms thru various points where reality intersects with it (intersection points), allowing them to pass through what would otherwise be solid matter into said Space and back (as long as the bounds of the intersection point are used), though certain intentional methods of access have been discovered and exploited in the past. Within the Backrooms, most biological functions cease to some degree as while sensations such as pain and hunger can be felt they will never induce death, which is attributed to the flow of time within them being incredibly inconsistent and disjointed. Exit is possible by discovering a pre-existing intersection point with ones reality of origin, though this is often nearly impossible due to the Perception Principle.

Perception Principle

As accidental access is possible, a population of Humans has over time accumulated the Backrooms with varying levels of organization which has allowed for the existence of certain small communities of people, though establishing a proper "society" within the Backrooms is incredibly difficult. A rarely understood phenomena is that the Backrooms' structure often only remains consistent via perception, if a route is not measured (by draping ropes, drawing markings on the wall or mapping areas), then the path travelled may not remain consistent due to the lack of measurement or perception as Backrooms abstracts onto itself. A group can remain intact as everyone's perception and measurements keeps the area consistent enough for said group to persist as long as they don't stray too far from their shared perception range (with said 'perception' including all physical senses, most notably sight and hearing), with multiple stable points allowing for communities to remain in contact either via couriers, travelling in a group, or wires which allow for communication. While many communities and settlements do exist, contact is regardless limited and most that find themselves within a Liminal Space are left desolate. Non-Human lifeforms seemingly native to the Backrooms are a rare occurrence, often being reconstructed Humans or other unusual beings whose existence is rare and difficult to prove.

Certain rooms or locations naturally negate the perception principle known as 'stable points' which can be discovered as points of natural congregation (seeming appearing in many places at once, but being the same location regardless of position) where shared perception ranges can be created as long as a group remains intact, with those who stray too far easily being separated if the group perception range is exited by said individual. The Backrooms tends to be naturally isolating, with coming across others outside of stable points being nearly completely impossible due to their infinite scale, thus only a tiny fraction of individuals ever manage to join groups. The perception principle is also known to affect people psychologically, with those without something to 'ground them' often being subject to various psychological issues involving forgetfulness, dissociation, depersonalization, hallucinations, delusions, and paranoia especially if isolated from stable points or perception ranges, which are together classified under 'Liminal Maladjustment'.

While accidental access thru Intersection Points is the most common route of access into the Backrooms, groups such as the SDS Foundation have managed to create artificial Intersection Points which allow for controlled access into specific locations (with the most notable being the Portal Matrix). As navigation through the Backrooms without measurement is incredibly uncertain, the SDS Foundation has made use of its own measurements to utilise them as a place to hide their facilities and activities at the cost of further destabilizing the Sub-Spaces they occupy via their artificial intersection points, making those aware of their presence opposed to their activities. A major obstacle that hinders these larger exploitation projects is the fact that the flow of time within the Backrooms is non homogenous and often locally incoherent.

Abstraction Principle

The Backrooms, by its nature, consists of reconstructions of locations within Baseline Reality which undergo a process known as "Reconstructive Abstraction". Every time a place is copied, it initially may resemble a much closer approximation to what it originally appeared as, though this begins to break down as the Backrooms copies its own copy in a repeating process. Over time, previously distinct looking locations converge into a uniform state where further Abstraction will not cause significant differences to the internal topography of the structure, thus changes become more visible on the periphery as regions which have not undergone extensive Abstraction may often resemble vastly different locations when compared to the anchor space, which is known as The Lobby. The Backrooms can feasibly reconstruct any location within Baseline Reality (how or why this is done remains unknown, especially whether or not it is a "conscious decision"), though it is are most capable of recreating locations it intersects with as it is able to ascertain more information to recreate the location with higher accuracy than it would be able to otherwise, implying that distance is a factor in how evident Abstraction is. Beyond inanimate objects and locations, the Backrooms also known to rarely reconstruct animate matter.

Liminal Systems are created when a Liminal Space (including those outside the Backrooms) undergoes sufficient abstraction as to have a clear infinite anchor space which has fully converged into a uniform state (even if it may still occasionally rearrange itself due to the perception principle), allowing for numerous other "Sub-Liminal-Spaces" to branch off of it as areas which have not undergone similar levels of abstraction split from one another while remaining physically connected to one another, though due to the size of Liminal Systems convenient transport is done via domestic Intersection Points where the System folds in on itself. As reconstruction is derived from Baseline Reality, Liminal Systems can be used as a method of travelling between locations in Baseline Reality even if distances are amplified considerably.

Structure of the Backrooms

The Backrooms is known to be derived from two sources which coexist to give them form, with the first of said requirements being a (usually) enclosed enclosed physical location (usually tied to specific intersection points) which is then expanded as the template for an infinitely expansive space via the Noosphere of those perceiving said spaces as the sole source of information able to fill in the non-functional gaps left behind from the initial creation of the space. Access into the Backrooms is made possible via the previously explained 'Intersection Points' which make follow one of many types, with the most common types being one-way access points which allow access into the Backrooms but only offer access across the Backrooms itself when crossed, two-way access points where the entry and exit to-and-from the Backrooms remain tethered, and a rare type being seen in (Semi-)Transitional Spaces which act as a intermediary state between Baseline Reality and a standard Sub-Space which allows for access to-and-from both ends. All locations within the Backrooms aside from (Semi-)Transitional Spaces are wholly detached from their reality of origin with no physical interconnection beyond traversal.

There are multiple types of locations one may encounter within the Backrooms and other Liminal Systems, which are areas composed of multiple Liminal Spaces that have connect and amalgamated together into one cohesive structure which can be physically navigated thru from space-to-space, though travel is made much quicker via domestic Intersection Points, with each of these constituent Spaces within Systems referred to as Sub-Spaces[5] which typically appear in a ordinal layered placement as they are further or lesser abstracted forms of the 'first subspace' from which all others extend from as they reconstruct other realities, while Enigmatic Sub-Spaces which lack have an unknown abstraction point and sub-spaces too small to meet the requirements of a 'standard Liminal Space' being known as Micro-Spaces[6]. Transitional Spaces[7] are Liminal Spaces which are located in a intermediary position between Reality and the Backrooms (or are otherwise separate Spaces interconnected with Reality) which allow for navigation between Reality and the Backrooms, though they may rarely take the form of a location in reality with liminal properties rather than a fully-developed intermediary space which are known as Baseline-Type Semi-Transitional Spaces, which are contrasted by System-Type Semi-Transitional Spaces which are locations physically within reality but can only be accessed via the Backrooms and cannot be exited. Beyond Sub-Spaces which are clearly their own 'locations', many typically smaller Liminal Spaces known as 'Intra-Spaces'[8] may be connected to a 'parent space' which are either wholly distinct despite their connection or a partially separated offshoot of their parent with one entrance (which are both either naturally created or are created via the artificial construction of enclosed physical locations being subject to "liminal properties" for extended periods of time), though some (known as Inter-Spaces[9]) may be connected to two Liminal Spaces rather than one in order to act as a bridge between the two.

Each Sub-Space within the Backrooms is given a 'survival difficulty' warning which consolidates important information explaining how difficult it is to survive within it into 3 categories; Safety, Consistency, and Maladjustment.

  • The safety of a Sub-Space may be classified as 'Safe' or 'Unsafe' depending on both environmental hazards and resource limitations alongside other factors which may affect survivability.
  • The consistency of a Sub-Space may be classified as 'Consistent', 'Sporadic Consistency', and 'Inconsistent' depending consistent navigation without a perception range is (without which areas are subject to change in form) within the Space, which can be improved by 'measuring' them with string or markings.
  • The maladjustment rate within a Sub-Space may be classified as 'No Maladjustment', 'Minimal Maladjustment', 'Low Maladjustment', 'Occasional Maladjustment', 'High Maladjustment', 'Critical Maladjustment', and 'Uncertain Maladjustment' depending on how prevalent "Liminal Maladjustment" is within the space, which refers to the culmination of numerous common psychological issues which being within the Backrooms may cause such as forgetfulness, dissociation, depersonalization, hallucinations, delusions, and paranoia.

List of Sub-Spaces

Beyond the Lobby, the following is a list of other Sub-Spaces that find themselves within the Backrooms System:

Interdimensional Index Nickname Liminal Type Present Groups Description
Dimension-Loc:4.5.001/5/197.0 A Room with nothing in it Intra-Space A relatively small illuminated yellow room filled with levitating furniture that seemingly erases all memories of its existence if it is entered and then exited by an individual.
Dimension-Loc:4.2.001/5/151.4 Antarctica Sub-Space A vast frozen over underground laboratory beneath a vast glacier-covered continent with occasional scientific outposts scattered across it.
Dimension-Loc:4.2.001/5/151.11 Apartment Void Sub-Space Secure-Defend-Subjugate Backrooms A seemingly infinite apartment complex with countless floors of straight hallways with occasional staircases that connect the floors found fairly frequently.
Dimension-Loc:4.2.001/5/281.3 Archive Sub-Space A multi-layered circular library with hallways extending in every direction from the middle of each floor.
Dimension-Loc:4.5.001/5/283.1 Back Alley Intra-Space A small urban neighbourhood within a forested environment.
Dimension-Loc:4.2.001/5/155.0 Basalt Cavern Sub-Space A connected hallway, maze, semi-flooded cavern, and a set of rooms that each share the common trait of being composed of basalt rock.
Dimension-Loc:4.2.001/5/144.15 Blue Dreams Sub-Space A dark, flooded, and cold cavern. The cavern itself is constructed around of a strange material that constantly emits weeping noises and secretes human tears.
Dimension-Loc:4.6.001/5/144.4 Blue Forest Inter-Space A large underwater forest submerged in tens of meters of water reminiscent of both of its 'parent' sub-spaces.
Dimension-Loc:4.2.001/5/152.10 Borderzone Sub-Space Secure-Defend-Subjugate Backrooms A infinitely long magenta-coloured hallway.
Dimension-Loc:4.2.001/5/152.4 Brick Stairs Sub-Space A oversized staircase-like structure built out of bricks, taking the shape of a spiral of steps within a enclosed chamber.
Dimension-Loc:4.2.001/5/192.4 Cold Islandia Sub-Space Backrooms Reorganized Explorer's Organization A large and distinct hill containing a village that is surrounded by a vast winter landscape full of boreal trees and shipwrecks.
Dimension-Loc:4.2.001/5/281.2 Construct Sub-Space Backrooms Military Administration A small urban environment containing a couple buildings and various underground structures within a walled area.
Dimension-Loc:4.2.001/5/152.6 Corrupted Passages Sub-Space An unusual series of rooms, hallways, and other spaces which house several environmental hazards such as steep drops or lava.
Dimension-Loc:4.2.001/5/282.0 Courtyard Sub-Space A series of irregularly-shaped courtyards and hallways composed of white-coloured concrete walls of unknown thickness with various windows built into them.
Dimension-Loc:4.2.001/5/192.8 Crimson Tunnels Sub-Space A series of red-coloured rooms and hallways notable for having an unusual fleshy texture to them in most sections of the sub-space.
Dimension-Loc:4.2.001/5/193.2 Creepspawn Sub-Space A small town and museum that is entirely coated with an unusual fungal growth that poses a significant threat to human life.
Dimension-Loc:4.2.001/5/144.16 Crush Depth Sub-Space A oversized flooded house underneath a ice sheet. The house itself has a suburban design, and features a main house, a shed, and a garage.
Dimension-Loc:4.2.001/5/192.6 Dead Church Sub-Space A large church building situated in a vast frozen, dead, and desolate field with the only notable structures or natural features within it beyond the church itself and various dead plants.
Dimension-Loc:4.2.001/5/144.8 Decrepit Hospital Sub-Space A abandoned-looking hospital within a vast boreal forest.
Dimension-Loc:4.1/5/146.5 Disparity Sub-Space Secure-Defend-Subjugate Backrooms A large winding cave system with its walls made out of a pitch black rock commonly covered in impossible massive spiderwebs festering with the native Golden Spiders and Slime Queen.
Dimension-Loc:4.6.001/5/144.7 Dissonance Sub-Space Backrooms Military Administration A winding non-Euclidean maze of dimly-lit red-coloured corridors which while being harmless, are notable for inducing feelings of uneasiness and paranoia when alone.
Dimension-Loc:4.6.001/5/144.6 Drowned School Sub-Space A flooded primary school. with a varying depth of roughly 1-2 meters of water submerging its floor with a couple exceptions such as the basement.
Dimension-Loc:4.2.001/5/305.0 Electrical Station Sub-Space A series of long twisting hallways with walls comprised of worn down bricks typically covered up by pipes and electrical components that occasionally lead to seemingly randomly placed rooms that contain various objects within them.
Dimension-Loc:4.5.001/5/284.0 Fieldport Intra-Space City State of Infinitopolis A large airport located in a infinite featureless field, with the only other 'structure' of any kind being a long road that leads to and from Infinitopolis.
Dimension-Loc:4.5.001/5/152.5 Flipped Reality Intra-Space A flipped and warped version of The Lobby, which it is directly connected to.
Dimension-Loc:4.2.001/5/281.1 Flooded Basement Sub-Space A vast and winding basement complex consisting of storage rooms and countless kilometres of flooded tunnels typically in complete darkness.
Dimension-Loc:4.2.001/5/195.0 Folded Forest Sub-Space A vast forest which is mirrored into the sky.
Dimension-Loc:4.6.001/5/144.5 Four Dimensions Inter-Space A incredibly unstable and warped environment taking the shape of a segmented sphere.
Dimension-Loc:4.6.001/5/216.1 Fractured Forest Sub-Space A small dimly lit deciduous forest that is entirely enclosed by a barrier consisting of illuminated leaves from all directions.
Dimension-Loc:4.2.001/5/216.0 Fractured Sea Sub-Space Secure-Defend-Subjugate Backrooms A large building that serves as a apartment complex and shopping centre situated within a vast sea of Fracture Weld which extends an unknown distance downwards from the front door.
Dimension-Loc:4.2.001/5/152.9 French Square Sub-Space A urban market square surrounded by several apartment buildings, which notably are all labelled in French.
Dimension-Loc:4.2.001/5/321.0 Gardenrooms Sub-Space A indoor garden surrounded by pristine white-coloured walls overlooking a infinite blue sky, with the varied interior environments containing various plants.
Dimension-Loc:4.2.001/5/151.9 Gargantuans Sub-Space An unusual realm that takes the form of two massive hundred-meter tall creatures engaging each other in a violent battle within a dark void which has been going on ever since the sub-space was first discovered.
Dimension-Loc:4.2.001/5/151.8 Goliath Sub-Space A large airship-like vessel flying within a infinite dark void with several labelings across the vessel referring to it as the 'HMA Goliath'.
Dimension-Loc:4.2.001/5/146.6 Heaven Sub-Space A long ornate hallway. The hallway has countless windows on its sides, showing a view of a vast cloudy void. The Hallway seemingly goes on forever, as no one has ever managed to reach its end.
Dimension-Loc:4.2.001/5/151.6 Hollow Iceberg Sub-Space A flooded frozen cavern.
Dimension-Loc:4.2.001/5/192.3 Honeycomb Insulation Sub-Space A long and winding attic space that seemingly surrounds The Lobby.
Dimension-Loc:4.2.001/5/151.5 Hotel Backrooms Sub-Space Secure-Defend-Subjugate Backrooms A large hotel complex situated in a coniferous forest, acting as a haven for travellers thanks to its replenishing resources, safety, and large number of hotel rooms (of which many act as apartments).
Dimension-Loc:4.2.001/5/374.1 Hotel Fright Sub-Space An expansive hotel interior typically consisting of older interiors consisting of decorations and furniture from the first century AGS, with said furniture being in surprisingly good condition despite their age.
Dimension-Loc:4.2.001/5/154.0 In Between Sub-Space A series of floating magenta-coloured 'islands' that float around freely in a void-like space.
Dimension-Loc:4.2.001/5/151.13 Infinitopolis Sub-Space An infinite city home to countless homes, shops, restaurants, recreational activities, and everything else may expect to find in a major urban area.
Dimension-Loc:4.2.001/5/282.2 Interconnected Asylum Sub-Space An unusual warped mental asylum, looping in on itself in a repetitive for several iterations until eventually coming to an end.
Dimension-Loc:4.2.001/5/144.3 Inverted Reality Sub-Space Backrooms Reorganized Explorer's Organization A upside-down jungle.
Dimension-Loc:4.2.001/5/195.1 Isles of Blood Sub-Space A group of two floating islands seemingly located above The Lobby. The trees, ground, and other structures within these islands are entirely composed of an unknown 'fleshy' substance.
Dimension-Loc:4.2.001/5/315.0 Labyrinth Sub-Space A vast labyrinth with roughly 16 metre tall walls and frozen floors, being notable for its isolated and cold atmosphere.
Dimension-Loc:4.3.001/5/192.1 Latina Nuclear Plant Transitional Space SDS Foundation A vast partially destroyed nuclear powerplant surrounded by forests and additional structures that could be found next to such a structure.
Dimension-Loc:4.5.001/5/200.0 Level Boredom Intra-Space A 25x25 Meter dark gray room consisting of a rubber-like substance.
Dimension-Loc:4.2.001/5/144.10 Level Fun Sub-Space A vast labyrinth-like soft play area home to various hazards such as topographic abnormalities and hostile entities.
Dimension-Loc:4.2.001/5/155.1 Library of Wan Shi Tong Sub-Space A large five-floored library containing knowledge of countless magical abilities, specifically pertaining to Hecatian Magical Art.
Dimension-Loc:4.2.001/5/146.0 Lonely Road Sub-Space Backrooms Military Administration A long, dark, and gloomy road. This road traverses through the entire subspace, beginning in a road tunnel in its south end, and continuing through the dark landscape, and eventually transitioning into The Maple Forest.
Dimension-Loc:4.2.001/5/158.0 Misty Caves Sub-Space Secure-Defend-Subjugate Backrooms A long, misty cavern that extends for a vast distance until reaching a series of SDSB installations used for containing high-threat entities.
Dimension-Loc:4.2.001/5/144.17 Neverending Concrete Sub-Space A vast labyrinth of concrete rooms, hallways, and chambers. Neverending Concrete is among one of the larger known Liminal Spaces, as its varying concrete rooms seemingly go on and on in every direction.
Dimension-Loc:4.2.001/5/144.9 Neverending Staircase Sub-Space A vast stone staircase with a collection of boiler rooms at the top.
Dimension-Loc:4.2.001/5/283.0 Orphanage Sub-Space A fairly large wooden orphanage home to a large eating area, library, kids play area, a basement, various class rooms, various sleeping areas, and a largely unexplored attic.
Dimension-Loc:4.2.001/5/281.5 Overgrown Reactor Sub-Space A large nuclear powerplant that appears to be abandoned, with various structural damages and overgrowths in the form of vines or other plants coating the building.
Dimension-Loc:4.2.001/5/159.0 Pillars Sub-Space Cultists A series of dark rooms filled with mentally hazardous pillars which is accessed via a elevator room with two accessible floors.
Dimension-Loc:4.2.001/5/167.0 Portal Matrix Sub-Space A series of 'futuristic' corridors, tunnels, and rooms centred around a large portal complex utilised for interdimensional travel.
Dimension-Loc:4.2.001/5/193.0 Pylons Sub-Space A series of pylons and towers situated in a vast sea of an unidentified liquid metal notable for its conductive properties.
Dimension-Loc:4.2.001/5/374.3 School Halls Sub-Space A vast winding "maze" of high school hallways with occasional small classrooms and other school-typical rooms accessible thru doors along its walls.
Dimension-Loc:4.2.001/5/152.7 Shipwreck Sub-Space A series of shipwrecks situated within a turbulent sea notable for its strange 'bowl'-like currents.
Dimension-Loc:4.2.001/5/281.6 Submarine Halls Sub-Space A winding labyrinth of concrete and metal hallways (depending on where you are) that resemble those found on a submarine.
Dimension-Loc:4.2.001/5/152.1 Suburb Street Sub-Space A seemingly infinite suburban neighbourhood in a state of perpetual night that spreads out in every direction.
Dimension-Loc:4.2.001/5/193.1 Swimming Pool Sub-Space Swim Team A white-coloured swimming centre located within a vast void, with both the exterior of the building and the pools themselves extending an infinite distance downwards.
Dimension-Loc:4.5.001/5/195.2 the backroom Intra-Space a 5x5 meters white room (four walls, ceiling, floor) with window, chair, fan and door.
Dimension-Loc:4.2.001/5/281.4 The Cave Sub-Space Secure-Defend-Subjugate Backrooms A vast cavern containing both thinner tunnels and massive open chambers.
Dimension-Loc:4.2.001/5/144.2 The Chasm Sub-Space A massive canyon or trench made out of grey rock, with several additional canyons which extend out of its edges into other directions.
Dimension-Loc:4.2.001/5/152.2 The Convention Sub-Space Furry Squad A vast convention building featuring rooms such as panel rooms and market halls, which are all supposedly intended for Furries.
Dimension-Loc:4.2.001/5/144.13 The Crooked House Sub-Space A vast oversized house slightly tilted to its side, alongside various hidden rooms below it. The Crooked House section is the only populated and properly explored one, as the underground rooms have so far mostly been avoided by the pre-established populace to avoid unneeded risks.
Dimension-Loc:4.2.001/5/152.8 The Cruise Sub-Space A large cruise ship within a seemingly infinite sea.
Dimension-Loc:4.2.001/5/144.11 The Dark Forest Sub-Space A dark muddy forest trapped in perpetual night time.
Dimension-Loc:4.2.001/5/144.12 The Dark World Sub-Space The Darkened A long, dark, and enclosed pathway. Most of the pathway is structured around steep cliffs and drops.
Dimension-Loc:4.2.001/5/374.0 The Darkness Liminal System A vast labyrinth shrouded in complete darkness, with no light permeating within the sub-space and all light sources becoming dysfunctional upon entry.
Dimension-Loc:4.2.001/5/312.0 The Desert Sub-Space Community of New Alshqati A vast expansive desert consisting of sand dunes. The further you travel the smaller the dunes become until becoming flat, making such areas habitable due mild temperatures and aquifers.
Dimension-Loc:4.2.001/5/151.1 The Edge Sub-Space The Wonderland A small forest facing a steep cross section of a forested field, which if climbed or crossed thru (via caves) will lead one to a highly cognitohazardous area which is not advised to be entered.
Dimension-Loc:4.2.001/5/284.1 The End Sub-Space A large pale-yellow library in a state of varying quality, with certain regions being relatively clean and others being visibly derelict.
Dimension-Loc:4.2.001/5/146.4 The Facility Sub-Space Secure-Defend-Subjugate Backrooms A large and futuristic generator complex, which allegedly acts as one of the locations that powers the entire Backrooms' power network. The accessible environments are countless floors of circular hallways surrounding 4 large empty spaces which have the energy from the reactor blasting through them.
Dimension-Loc:4.2.001/5/282.1 The Forgotten Sub-Space A wooden mansion devoid of any light sources situated within a field that shares a similar darkness.
Dimension-Loc:4.5.001/5/151.1 The Fountain of Death Intra-Space A dark stone fountain with unusual properties within a blue-coloured boreal forest.
Dimension-Loc:4.2.001/5/151.0 The Fountain of Youth Sub-Space A ornate white fountain with unusual effects located in a small forest with red-coloured trees akin to those found in The Maple Forest, although much denser.
Dimension-Loc:4.2.001/5/160.1 The Gateway Sub-Space A long dark tunnel with various floating skyscrapers flying through it at varying speeds, with some flying rapidly and some moving more slowly and safely.
Dimension-Loc:4.2.001/5/193.3 The Lighthouses Sub-Space A collection of 25 lighthouses assembled into a square formation within a vast ocean, which unlike many other oceanic sub-spaces is potable and safe.
Dimension-Loc:4.2.001/5/144.1 The Lobby Sub-Space A infinite empty office building with a seemingly infinite number of segmented rooms and corridors nearly universally covered in dull-yellow wallpaper and moist tight-nit carpets that acts as the overarching structure from which all other iterations of itself (which are the other Sub-Spaces) extend from due to acting as the source of reconstructive abstraction.
Dimension-Loc:4.2.001/5/146.1 The Maple Forest Sub-Space A long road going through the middle of a blood-red forest. It is considered entirely habitable and rich with various resources, because of which it is considered one of the most favourable places in the entire Backrooms for one to reside.
Dimension-Loc:4.2.001/5/160.0 The Metro Sub-Space A vast maze of metro tunnels that contain networks of railways that typically lead to different sub-spaces after a long period of travel.
Dimension-Loc:4.2.001/5/146.2 The Mist Sub-Space A large, misty crater. This crater is surrounded by vast stone walls which seemingly go on forever. The most notable feature of the crater is the vast layer of grey mist.
Dimension-Loc:4.2.001/5/305.1 The Office Liminal System A mostly (but not entirely) empty office building with white walls, gray carpets, and numerous blacked out windows.
Dimension-Loc:4.5.001/5/301.0 The Outskirts Sub-Space City State of Infinitopolis A expansive coniferous forest home to countless small towns, villages, and other assorted structures connected to one another via long rural roads or small footpaths going throughout the forest.
Dimension-Loc:4.2.001/5/374.2 The Parkade Sub-Space A seemingly infinite indoor multi-story carpark that mainly contains various cars, full shopping carts, and the occasional staircase leading between floors.
Dimension-Loc:4.2.001/5/146.7 The Pillars Sub-Space A series of vast many kilometre long pillars situated within a dark void.
Dimension-Loc:4.5.001/5/281.0 The Pizzeria Intra-Space A large abandoned pizza establishment, with many areas either seemingly left as they were and other areas completely emptied out.
Dimension-Loc:4.2.001/5/306.0 The Poolrooms Sub-Space A vast complex of interconnected rooms and corridors partially submerged in lukewarm water, being far too large to properly serve the function of a pool
Dimension-Loc:4.2.001/5/183.0 The Railway Sub-Space Backrooms Reorganized Explorer's Organization A rural railway with countless small villages, towns, and farms along the railway.
Dimension-Loc:4.2.001/5/312.1 The Sea Sub-Space A seemingly infinite ocean, stretching for an unknown distance in all directions.
Dimension-Loc:4.2.001/5/144.14 The Sewer Sub-Space A large sewer system filled with countless sharp corners, drops, sewagefalls[10], and occasional flooded areas. '
Dimension-Loc:4.2.001/5/151.12 The Space Ocean Sub-Space A vast underground sea within a cavern composed of concrete filled with countless flora and fauna and occasional air-filled caves.
Dimension-Loc:4.5.001/5/151.3 The Train Sub-Space Secure-Defend-Subjugate Backrooms A seemingly infinitely long train situated in an avenue of coniferous trees and a leafy perimeter wall. Each of the carriages within the Train are largely identical with rows of seats, windows, and red walls.
Dimension-Loc:4.2.001/5/151.10 Timeline Island Sub-Space Secure-Defend-Subjugate Backrooms Two small islands within a vast sea surrounded by a barrier preventing further exploration. The islands are notable for seemingly shifting dimensions at random intervals, taking all those that are on them with them.
Dimension-Loc:4.2.001/5/151.7 Truffle Cavern Sub-Space Truffle Diarchy A large cavern coated with a thick mat of blue mycelium, with occasional bioluminescent spots lighting up the mushroom-filled cavern. Countless large mushrooms grow out of the ground, which is flooded with a few meters of water.
Dimension-Loc:4.2.001/5/192.0 Vertigo Sub-Space A massive white apartment complex situated within a vast, dense fog that surrounds the base of the apartment complex.
Dimension-Loc:4.2.001/5/152.0 Voidzone Sub-Space Insurgency against Earthly Colonization of the Backrooms A chaotic assortment of connected rooms which often house common themes of magenta-coloured walls or unusual messaging, being by far one of the most unusual locations to be discovered within the Backrooms.
Dimension-Loc:4.2.001/5/158.1 Walled City Sub-Space A large city consisting of crude structures surrounded by a hollow wall of stone.
Dimension-Loc:4.2.001/5/324.0 Wheat Field Sub-Space SDS Foundation A seemingly infinite pasture of wheat, varying from vast boundless fields to smaller plots divided by trees and other flora.
Dimension-Loc:4.2.001/5/192.7 Winter Home Sub-Space A house on a small island covered in a thick layer of snow situated within a vast ice cold sea.
Dimension-Loc:4.5.001/5/192.5 Yellow Land Intra-Space A hilled forest landscape with several lakes, although completely composed of the materials in The Lobby's walls and floor.
Dimension-Loc:4.2.001/5/151.14 Your Room Sub-Space A endless white voice upon entry, which then grants all who enter it the ability to create and display anything within it, with the only limit being their imagination.

Other Liminal Systems

Beyond the large and expansive Backrooms System, various other smaller Liminal Systems disconnected from the Backrooms are known to exist.

The Outer Rooms
The Outer Rooms
Aliases
Inter-dimensional IndexDimension-Loc:4.1/5/153.0
Dimensional Information
Primary TypeLocational Dimension
MultiverseBaseline Reality
Dimensional FormUnreality
Locational Sub-TypeLiminal Space
Liminal Sub-Sub-TypeLiminal System
Average Reality Stability68ξ
Topographical Information
Demographic Information
Political Information
Navigational Information


The Outer Rooms were a collection of several liminal spaces which existed until the MV209 event, which either destroyed them or eliminated all connections method to them.

List of Sub-Spaces

Living Rooms
Living Rooms
Aliases
Inter-dimensional IndexDimension-Loc:4.1/5/174.0
Dimensional Information
Primary TypeLocational Dimension
MultiverseBaseline Reality
Dimensional FormUnreality
Locational Sub-TypeLiminal Space
Liminal Sub-Sub-TypeLiminal System
Average Reality Stability68ξ
Topographical Information
Demographic Information
Political Information
Present GroupsDiner Staff
Navigational Information


The Living Rooms is the first safe and stable Liminal System to be discovered, with the entrance found in a mansion located east of Alephitis, Tritonien.

List of Sub-Spaces

The Deeprooms
The Deep Rooms
Aliases
Inter-dimensional IndexDimension-Loc:4.1/5/281.0
Dimensional Information
Primary TypeLocational Dimension
MultiverseBackrooms?
Dimensional FormUnreality
Locational Sub-TypeLiminal Space
Liminal Sub-Sub-TypeLiminal System
Average Reality Stability68ξ
Topographical Information
Demographic Information
Political Information
Navigational Information


In the year 209 a catastrophic event happened in the New Frontier, Damp Hallway and Doorway limspaces, which were all once part of the Backrooms. The Event, which was named "MV209" ("Multiverse '209") was caused by Fracture being completely healed, which simultaneously caused entrances to the three Liminal Spaces to stop working as intended. It is thought that they were completely, because all communications from SDSB operatives in the 3 levels cut approximately 18 minutes after the initial MV209 event. Following MV209, anyone who attempted to use the former entrances to these three levels would "Go somewhere deeper". Until the year 281, nothing was known about this "deeper" area. Until a full drone-investigation began into the area. It seems to be a system of enigmatic liminal spaces found deep down below underneath the entirety of the backrooms.

The 'Deeprooms' are completely barren despite a constant feeling of being watched.

Solitary Spaces
Solitary Liminal Spaces are independent Liminal Spaces which are not connected to any larger System, making them often much more isolating due to the lack of transition to other "landscapes". The following is a list of such spaces:

Phenomena within Liminal Spaces

There are a plethora of strange, unexplainable occurrences which occur within Liminal Spaces - unexplained, unnatural occurences that are typically not fully understood. These are known for defying the laws of physics, pushing the bounds of ideas such as time and euclidean geometry, bending reality as we know it. As these phenomena can include a wide array of inexplicable events, it is advised to use caution when exploring sub-spaces that are unexplored or poorly understood.

Fracture
Fracture was a mysterious affliction present within the Backrooms since the creation of the exit portals - whom had supposedly been causing levels to act unusually and hinder domestic Intersection Points. More common theories on why this was occurring was due to the portals 'tugging' on the Backrooms as a whole, although this was never proven. Fracture was eventually repaired after a large deposit of Fracture Weld was discovered.

Nihilantis Effect
An example of the Nihilantis effect taking place in the Decrepit Hospital. The red-shifting may or may not be a result of the reflection of light around the object due to repulsitivity, however this may also be partly attributed to the effect itself.

The Nihilantis Effect is a strange phenomenon caused by excessive duplication. It is estimated that it happens once in every 2500 duplications, but research shows it can be made artificially, given enough energy.

Utilising replication technology can be an arduous task in Liminal Spaces due to the Nihilantis effect, which is a strange phenomenon that causes some duplicated items to appear as if the viewer had double vision. This duplicate object can be interacted with, however it adheres to different laws of physics. Instead of having attractive gravity (although extremely small given the density, this can vary,) it obeys the laws of antigravity, and instead it repulses matter. Again, this effect is not visible to the naked eye or even microscopes, but an object with large enough density could almost certainly have visible properties. The atoms of the object, when inspected, are consisted out of antiprotons and antineutrons, which are made out of antiquarks, (and even very rarely, strange and charm quarks in their normal variant)with a nucleus orbited by positrons. As it is further investigated, the anti-object shows mostly opposite traits to normal objects. However, the SDSB is researching the qualities of the anti-objects caused by the Nihilantis effect, and are yet to discover whether the anti-object has negative mass. Currently, their weighing scales only show it as either positive or even 0, propagating this theory. If proven to be true, it becomes a good candidate for the hypothesised 'exotic matter,' which demonstrates strikingly similar properties.

The Barrier
"The Barrier" is a largely unknown phenomenon that takes the form of an impassible "wall" that can be encountered in some regions of the Backrooms, making crossing it incredibly difficult. There are several unusual and chaotic sub-spaces within The Barrier such as the Borderzone, In Between, and the Voidzone. Through these sub-spaces entrances to The Outer Rooms were at one point found, though these no longer work.

Unraveling Cascade
The "Unraveling Cascade" is a hypothetical scenario in which a specific and hazardous enough Castrovalence Anomaly manages to initiate a run-away chain of Liminal Space formations akin to false vacuum decay, slowly spreading out as the entirety of the universe is consumed by Liminal Spaces one by one as it is reshaped into an interconnected mess of countless infinitely-sized spaces representing each individual room which had existed in the past. The feasibility of this scenario happening is uncertain, but largely thought to be incredibly unlikely.

Entity Sightings
There have been many reports of unusual lifeforms seemingly native to Liminal Spaces with their own motivations, abilities, behaviours, habitats, and physiological needs including wholly alien lifeforms created to inhabit the environments they exist in and lifeforms who act as reconstructions of Humans which aim to mimic their appearance, though due to the frequency of Liminal Maladjustment and the lack of extensive evidence few "entities" have been verified to exist.

A list of commonly reported "entities" include;

Objects
Many similar objects with a myriad of functions have been found within Liminal Spaces, ranging from tools, weapons, consumables, or other items. Many of these follow the rules of their reality, being found as mere decorations for individual Liminal Spaces, while others are real-world objects altered by a Limspace upon entry, and some are even created by the people who reside within Liminal Spaces. Some may be dangerous, while others may be crucial for survival - thus identification of objects is extremely important if one wishes to make use of them.

A list of documented objects includes:

Sub-Spaces
Backrooms System Antarctica • Apartment Void • Archive • Basalt Cavern • Blue Dreams • Borderzone • Brick Stairs • Cold Islandia • Construct • Corrupted Passages • Courtyard • Creepspawn • Crimson Tunnels • Crush Depth • Dead Church • Decrepit Hospital • Disparity • Dissonance • Doorway • Drowned School (Blue Forest) • Electrical Station • Flooded Basement • Folded Forest • Fractured Sea (Fractured Forest) • French Square • Gardenrooms • Gargantuans • Goliath • Heartache • Heaven • Hollow Iceberg • Honeycomb Insulation • Hotel Backrooms (Back Alley) • Hotel Fright • In Between • Infinitopolis (Fieldport • The Outskirts) • Interconnected Asylum • Inverted Reality (Four Dimensions) • Isles of Blood • Labyrinth • Latina Nuclear Plant • Level Fun • Library of Wan Shi Tong • Lonely Road • Misty Caves • Neverending Concrete (The Pizzeria) • Neverending Staircase • Orphanage • Overgrown Reactor • Pillars • Portal Matrix • Puddle • Pylons • School Halls • Shipwreck • Submarine Halls • Suburb Street • Swimming Pool • The Canyon • The Cave • The Chasm (A Room with nothing in it) • The Convention • The Crooked House • The Cruise • The Dark Forest • The Dark World • The Darkness • The Desert • The Edge (The Train) • The End • The Facility • The Forgotten • The Fountain of Youth (The Fountain of Death) • The Gateway • The Lighthouses • The Lobby (Flipped Reality • Level Boredom • Yellow Land) • The Maple Forest • The Metro • The Mist • The Office • The Parkade • The Pillars • The Poolrooms • The Railway • The Sea • The Sewer • The Space Ocean • Timeline Island • Truffle Cavern • Vertigo (the backroom) • Voidzone • Walled City • Wheat Field • Winter Home • Your Room
The Deeproom System
Living Rooms System The Diner • The Garden • The Hallways • The Modern Lounge • The Penthouse
The Outer Rooms System Damp Hallway • Doorway • New Frontier
Solitary Liminal Spaces Realm of the Forgotten*
Other
Groups Backrooms Reorganized Explorer's Organization • Backrooms Military Administration • Backrooms Transport Agency • Chasmic Urban Development Organization • City State of Infinitopolis • Diner Staff • Education United • Furry Squad • Goliath • Infinity College • Insurgency • Secure-Defend-Subjugate Backrooms • Silvanus • Swim Team • The Darkened • The Student's Union • The Wonderland • Truffle Diarchy • Yetian Corecent Rediscovery Squad
Entity Sightings Black Goo • Broodling • Crew • Gravites • Knowledge Gatherer • Latina Ravager • Maintenance • Mimics • Mirages • Neighbor • Nuntius • Purities • The Creep • Ultor • Wan Shi Tong
Objects Brood Repellent • Fracture Weld • Golden Syrup • Maple Syrup • Noclipper • Rift Projector
Other Backrooms Forum • Britha • Event-496B • Exit Portals • Fracture • Nihilantis Effect • SDSB-ANNOUNCEMENTS • The Barrier • Backrooms Flowchart • Militant Survivalism
  1. ↑ Classified as "Limsystem-001"
  2. ↑ While in the modern academic circle the Backrooms consists of many "Sub-Spaces", many of the inhabitants of the Backrooms colloquially call the various areas that make up their dimension "levels", the archaic term for a Liminal Space part of the Backrooms System which was created before extensive understanding of the nature of Liminal Spaces and their multiple instances separate from the Backrooms.
  3. ↑ Thus it is often considered to be a rare mix of Memoria and Orgone coexisting (a fact which is impossible within Baseline Reality)  
  4. ↑ Though "bounded" Limspaces aren't unheared of.
  5. ↑ Also known as "Levels" or "System Spaces"
  6. ↑ Also known as "Rooms"
  7. ↑ Also known as "Middle Rooms" or "Thresholds"
  8. ↑ Also known as "Sub-Levels"
  9. ↑ Also known as "Sub-Layers".
  10. ↑ Waterfalls, but sewage water.
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