Template:Kclass

Main Name	Other Titles	Description
AK-class	End-of-the-world scenario "Madness" End of the world scenario	Related to a memetically spread behavior or "madness." Could be apocalyptic (e.g., people prioritize the behavior over eating/survival) or just radically reorient society around the behavior.
ADK-Class	"Complete Anomalous Destabilization" Scenario	A general scenario which occurs when the "anomalous" reclaims Yata & Theia. Typically occurs 1 to 3 years after an unspecified human extinction event or SK-Class Dominance Shift.
CK-Class	Restructuring Scenario Reality Restructuring Scenario Reality-ending scenario Reconfiguration event Restructuring of modern society "End-of-Reality" Scenario	Reality is changed by a deity/reality bender/retrocausal altering of history/etc. These can be radical, broad changes representing a true end of the world, or small "localized" changes. (See also RK)
EK-Class	End of Human Consciousness	Total loss of human consciousness. Sometimes just obliviated due to complete memetic replacement or corruption. (See also MK, ED-K)
FK-Class	N/A	N/A
GH-0/GK-Class	'Dead Greenhouse' scenario GK-Class End of the World Scenario Hostile-greenhouse scenario Climate Inversion event "Colorless Plague" end-of-humanity event "Broken Greenhouse"	Originally appearing in the ████████████████ document, where it meant that humans are endangered/extinct but Earth is still fit for habitation. Usage of G-Class scenarios in SDS documents is inconsistent but usually involves habitability.
HK-Class	Deific Subjugation Scenario	A god shows up and takes over.
IK-Class	Collapse of Global Civilization Scenario	Civilization collapses.
LK-Class	Species transmutation scenario Restructuring event Personality Transmutation Event Change of Species Scenario	Something about humanity is altered.
MK-Class	"End of Human Consciousness" scenario	Total loss of human consciousness. (See also EK)
NK-Class	"Grey Goo" Scenario "Contagious Material" Scenario Type 2	A self-replicating SDS or object reproduces out of control, causing contamination to the planet, filling/replacing the world with itself, or similar situations. (Named for a hypothetical scenario where self-replicating nano-machines malfunction and turn the whole world into goop.)
PK-Class	“All-In-One” Existential Pandaemonium Event	An event in which a hyperreal consciousness collapses all hyporealities into the same meta-space, resulting in total narrative collapse from incomprehensibility and annihilation of consciousness.
QK-Class	Quantum degeneracy end-of-the-world scenario	A specific physics-based end of the world. For other physics-based EOTW, see VK, ZK, and YK.
RK-Class	Restructuring Scenario	Interchangeable with CK-Class, see that definition.
SK-Class	Dominance Shift Scenario	Another species or civilization surpasses humanity as dominant species, or vice versa.
TK-Class	Causal Restructuring Event Broken Timeline Scenario	A massive CK-Class restructuring took place that resulted in the breaking and repair of the timeline. But like a broken vase, the repaired timeline is flawed, with events that don't line up and things that happened without a cause.
UK-Class	N/A	N/A
WK-Class	Mass Extinction Event	One or multiple non-human species become extinct.
XK-Class	End-of-the-World Scenario Type Alpha (scorched earth) end of the world scenario Type Omega (religious) end of the world scenario Vacuum Decay Extinction Event Scenario Δ-Class "Solar Singularity" Scenario Mass Extinction Event PATMOS End-of-the-world scenario	Most common and broadest meaning, covers just about any apocalypse. Religious apocalypse, humanity destroyed, Earth destroyed, the universe destroyed, etc. Some XK scenarios may fit well under other scenarios, such as ZK, but these definitions aren't mandatory.
XK-Δ-Class	"Solar Singularity" Scenario	A scenario in which the sun undergoes a "solar singularity" event, causing it to convert all living things its light touches into gelatinous monsters that combine and blend with each other.
YK-Class	(Assorted Physics EOTW) Entropic Annihilation Event End of the universe scenario Reality Restructuring Event Restructuring scenario Vacuum Decay	Basically always a physics-based apocalypse, usually has a specific sub-designation. See also ZK, VK, and QK.
ZK-Class	Reality Failure Scenario -0 Reality Failure Scenario Cosmic Fragmentation Scenario End of Reality scenario Reality reset	Reality is fundamentally broken or eliminated. Usually due to physics stuff or an SDS that annihilates things by nature. Sometimes this happens in a limited "localized" area. Originally used in physics-heavy articles but may have graduated to broader use. (See YK, VK, and QK).
ÞK-class	Extradimensional Diplomatic Breakdown scenario	Diplomatic relations with a powerful extradimensional organization break down.
Lifted Veil*	Lifted Veil Scenario Broken Masquerade Scenario LV-Zero "Lifted Veil" scenario ßK-Class "Lifted Veil" scenario BK-Class Broken Masquerade Scenario SK-Class "Broken Masquerade" scenario X-Class 'Lift of the Veil' scenario	The SDS Foundation or anomalous become public knowledge.
ET-Class	Eithel-Thorn Breathability Scenario	N/A
BI-Class	Before Invasion Scenario	A K-Class scenario, particularly an invasion from another dimension, is imminent.
CC-Class	"Collapse of Chemistry" scenario	The laws of physics are altered in a way so that the chemistry relying on the carbon element no longer provides the conditions suitable for creating life.
K	K-Class	Unspecified K-Class