A Comprehensive List of Esoteric Classes

The Foundation's primary directive is to order the anomalous by designating instances with four-digit numbers and methods of containment. One of the tools used to accomplish this is the Object Class, a process of parsing anomalies into groups based on the difficulty of containment. Full dossiers are available for archivists wishing to familiarize themselves.

Despite this, some anomalies warrant entirely new object classes beyond the standard Safe, Euclid, and Keter, and sometimes even beyond Thaumiel, Neutralized, and Explained. These Esoteric Classes are exceedingly rare, and many are not viable for standard documentation due to their specialized natures. The following lists serve as a collection of these classes.

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This is an open, collaborative project. If you discover a class which is absent or has been improperly cataloged, feel free to add it.

See Also

[+] Unfold Resources [+]

• Primary Sources
  • esoteric-class - An automated list of articles tagged with "esoteric-class", although it does not include all examples of esoteric classes.
  • Object Classes Guide
  • Threat Levels Guide (Hosted on the International Wiki.)
  • Anomaly Classification System (ACS) Guide
    • This also has an automated catalog (Jump?) of articles using ACS.
• u/Cooldude971's Guides - These go into much greater detail on the definitions and histories of various classes than this guide will.
  • Master list of non-standard object classes (Hosted on Reddit.)
  • Master list of canonized and lost non-standard object classes (Hosted on Reddit.)
  • Where object classes came from: a history (Hosted on Reddit.)
  • The Origin of Object Classes
• If you want more cool ACS secondary class icons
• Object Class Flow Chart (Hosted on Reddit.)
• List of Esoteric Class (Depreciated, hosted on KaktusKontainer.)
• SCP Object Classifications (A forum post; origin of several theoretical classes; linked for historical purposes.)

A Guide For Contributors (Please read before editing!)

[+] Unfold Editorial Guide [+]

Given that additions to this guide are manual, it's very likely that some classes will slip through the cracks. If you have information on a class being improperly labeled in this guide, you can update it as appropriate!

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How to Edit

In order to change something, scroll down to "Edit" button at the bottom of the page and open the edit window. Please list a description of changes made in the "Short description of changes:" window. If you don't, expect a private message from Nagiros to clarify changes.

Also, don't correct the typo in Scarf's definition; it's intentional.

Adding New Classes

Here's the code for an entry; place it alphabetically in the appropriate section.

||Class||Definition (if necessary)||[[[SCP]]]||

If a class fits into the following descriptors, it's eligible for being added here.

• It isn't Safe, Euclid, Keter, Thaumiel, Explained, or Neutralized. Subclasses such as "Safe-prodest" are still eligible, however.
• It isn't a dual class of standard object classes. A document being labeled "Euclid/Keter" is not esoteric, but "Euclid/Archon" is, and the article should be added to "Archon" below.
• It isn't the same as another class. For example, "Esoteric" and "Other" are not treated like separate classes. This only extends to the similarity of definitions.
• It isn't in a joke article. Explained SCPs, tales, GOI formats, and everything else are fair game. Exceptions can be made for subclasses in joke articles which belong to an established subclass system.

That's it, really. There are some special cases for esoteric classes created by foreign branches, however. Namely:

• It isn't the result of third-party manipulation, anomalous or otherwise. These classes tend to be single-use and the purpose of including foreign classes is to increase cohesion between branches.
• It's a subclass. These should be added to the Subclasses section instead of the Foreign section.
• Its article has been translated. If this is the case, it is no longer considered a foreign class; treat it as a local one.

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Adding Or Changing A Definition

Definitions are only valid if they're sourced from an article, from an author who has used the class, or can be reasonably drawn from "general consensus" in the absence of a definition.

Generally, self-explanatory classes like "Uncontained" should not be given definitions. If a class' meaning can be reasonably inferred from its name, then leave the definition slot blank.

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Precedents

• "Decommissioned" was added after it was given a new definition in SCP-4456-D. It is treated as separate from the defunct standard object class of the same name.
• "N/A", "None", and "Unnecessary" are treated as separate classes due to slight variance in definitions.
• The "Location" subclass was added, despite having never been used, due to its necessity in completing the Type System.
• The multiple classes of SCP-4205 were grouped together.
• "Scarf" and "Youklid" were added, despite being misspellings of standard classes.
• The poetry in the Object Class fields of S. D. Locke's Proposal are not listed, because of their length and the proposal having already been linked under Apollyon.
• SCP-5708 was listed under the -prodest subclass despite not using it as a subclass, per author request.

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If you need any clarifications or have any questions, contact Nagiros over Wikidot. She isn't the "owner" of this page in any capacity, but she has been a major contributor.

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Established Esoteric Classes

The following object classes were created by the Foundation to describe the containment of certain anomalies, or the anomalies themselves.

► Established Esoteric Classes ◄

Class	Definition	Appearances
Anomalous1	Item is so simplistic that it is not assigned an official database file.	Dr. Gray's Proposal, SCP-472, SCP-1796, SCP-5214
Apollyon	Item is uncontainable and actively causing the end of the world.	Jim North's Proposal, McDoctorate's Proposal, Meta Ike Proposal, SCP-096-DE, SCP-ES-147, SCP-3999, SCP-4005, SCP-4023, SCP-4057, SCP-4485, SCP-4547, SCP-4780, SCP-4891, SCP-5055, SCP-5321, SCP-5391, SCP-5466, SCP-5500, SCP-5678, S. D. Locke's Proposal, In the end will be no words (RU)
Archon	Item is able to be contained but ought not to be.	I.H.Pickman's Proposal, SCP-1661, SCP-3310, SCP-3455, SCP-3787, SCP-4043, SCP-4052, SCP-4200, SCP-4223, SCP-4246, SCP-4494, SCP-4634, SCP-4778, SCP-5009, SCP-5015, SCP-5122, SCP-5520
Cernnunos	Item can be functionally contained, but the Foundation cannot achieve this for logistical and/or ethical reasons.	SCP-4971, SCP-5431, SCP-5699, SCP-5721
Contained		SCP-5999
Da'aS Elyon	Item cannot be physically contained, necessitating that the public be led to believe it is non-anomalous.	SCP-5338
Damballah	Item is contained, but the methods and purpose of containment are unknown.	SCP-5466
Declassified	Item has been revealed to the Foundation and/or public at large.	SCP-3368, SCP-3882
Decommissioned2	Item has been intentionally destroyed or deanomalized by the Foundation.	DEAD WEIGHT ≡ DON'T KILL THE VIBE, SCP-4175, SCP-4456-D, SCP-4659, SCP-5932-D
Dependent	Item is legally dependent upon the Foundation.	SCP-5296
Drygioni	Item is currently under an official investigation for authenticity by the Overseer Council.	SCP-4839
Ein Sof	Item's containment procedures elaborated to allow the constancy of a metaphysical anomaly, and to ensure an original balance established by a primordial entity.	Dr. Gray's Proposal
Embla	Item is used by the Foundation to create anomalies.	Dr. Mann's Proposal
Enochian	Item cannot be contained due to its properties constituting an aspect of baseline reality.	SCP-4755
Eparch	Item is non-anomalous but related to the anomalous.	SCP-139, SCP-ES-299, SCP-4015
Esoteric/Other		SCP-2505, SCP-4467
Gevurah	Item endangers the inner structure of the Foundation and limits the ability of the Foundation to carry out its secondary objectives.	SCP-3666, SCP-4645
Gödel	Item is explainable using anomalous science.	SCP-4555, SCP-5078, SCP-5326
Hera	Item is hostile but very useful to the Foundation.	SCP-4113
Hiemal	Item is a system of two or more distinct but related anomalies that keep each other under control. Meta-discussion logged here.	McDoctorate's Proposal, SCP-3240, SCP-3700, SCP-4121, SCP-4540, SCP-4568
Ignosi	Item's discovery, even by the Foundation, must be prevented.	Automated Passive Amnestization System Ver. 17.09
Irrelevant		McDoctorate's Proposal
Kušum	Item's containment has been abandoned indefinitely.	SCP-3319
Maksur	Item has been separated into several anomalous parts which must be kept separate.	TwistedGears-Kaktus Proposal, SCP-5241
N/A		SCP-CN-1000, SCP-3252, SCP-3443, SCP-3930, SCP-4104, SCP-4746, SCP-4892, SCP-5011, SCP-5549, SCP-5919
Netzach	Item is Earth and its ability to support life.	Billith's Proposal
Non-Anomalous		WJS Proposal
None		R-00X's Proposal (JP), SCP-048, SCP-1763-EX, SCP-2165, SCP-2508, SCP-2786
Principalis	Item constitutes the primary directive of the Foundation and the Overseer Council.	djkaktus's Proposal III
Simpatico	Item is unpredictable but not dangerous.	SCP-8999
Spiritual	Item is incorporeal; classification used exclusively by SCPF-LZPP87.	SCP-4487
Terminal	Item incorporates human beings following their death. In-depth definition here.	SCP-ES-145, SCP-ES-163, SCP-5523
Threatening		SCP-1851-EX
Tiamat	Item poses an immediate threat to humanity, but can be "contained" via open warfare or other Veil-breaking operations.	SCP-ES-244, SCP-3396, SCP-3895, SCP-4568, SCP-5034
Ticonderoga	Item cannot be contained but does not need to be contained.	R-00X's Proposal (JP), SCP-4270, SCP-4444, SCP-5170, SCP-5464, SCP-5494
Truculent	Item is unpredictable and containment must be adapted to an ever-changing set of circumstances.	SCP-4703
Uncontainable		SCP-ES-100-EX, SCP-5471
Uncontained		Nico's Proposal, SCP-340-FR, SCP-3005, SCP-3681, SCP-4612, SCP-5074, SCP-5097, SCP-5346, SCP-5471, SCP-5859
Unknown		SCP-3005, SCP-4972
Unnecessary		Lily's Proposal, SCP-4023, SCP-5143
Yesod	Item has been integrated into the Foundation's command structure.	spikebrennan's proposal, SCP-4436
Zeno	Item has medium containment difficulty and is low threat.	SCP-2005
Zurvan	Item constitutes an aspect of baseline reality and ought not to be interfered with.	SCP-5103

Subclasses

Because several anomalies do not totally conform to standard object classes — while not warranting the creation of a new class themselves — several subclass systems have been created to further describe their properties and/or their containment.

► Subclasses ◄

Suffix System

The following subclasses are attached to standard classes (e.g. Safe-alterius) to denote attributes of the anomaly. Several of these classes lack established definitions; where this is the case, definitions have been inferred.

Class	Definition	Appearances
alterius	Item is alien to Earth.	SCP-824, SCP-1041, SCP-1141
doctrina	Item is undergoing testing or investigation.	SCP-1306, SCP-5080, SCP-5211, SCP-5235
exsequi	Item is capable of independent action.	SCP-928, SCP-1268, SCP-1606, SCP-1646, SCP-1846, SCP-1868, SCP-2020, SCP-4766
flecto	Item displays one or more biological mutations.	SCP-625
impetus	Item is hostile.	SCP-066, SCP-619, SCP-984, SCP-1626
nuntii	Item possesses memetic attributes.	SCP-868, SCP-1246, SCP-1248, SCP-1448, SCP-4766
numen	Item is related to a deity.	SCP-1564, SCP-1704, SCP-1902, SCP-3906, DEAD WEIGHT ≡ DON'T KILL THE VIBE
potissimi	Item's containment is of high importance.	SCP-2959
praedico	Item possesses clairvoyant attributes.	SCP-1668
prodest	Item possesses useful attributes.	SCP-066, SCP-5708, SCP-5211
provisi	Item is provisionally assigned a class until deemed otherwise.	SCP-2721, SCP-5041, SCP-5331, SCP-5411
reliquia	Item is an artifact or relic.	SCP-1962
supernus	Item is too distant and/or unnoticeable from the Earth or Solar System to be a priority.	SCP-5331, SCP-5471
ubique	Item has wide-ranging effects, geographically or otherwise.	PENDING ASSIGNMENT; reference SCP-1422.

Type System

The following subclasses are used in conjunction with standard classes (e.g. Safe // Location) to denote the applicable method of containment.

Class	Definition	Appearances
Location	Item requires containment to be built around it.	PENDING ASSIGNMENT
Object	Item does not need containment built around its position and does not have containment procedures which are reactionary.	SCP-2156
Phenomenon	Item has containment procedures which are reactionary in nature.	SCP-1422, SCP-5107

Object/Containment System

The following subclasses are Object Classes, with traditional classes designated Containment Classes (e.g. Object Class: Artifact; Containment Class: Safe) They denote characteristics of the contained item and may be used in conjunction with one another (e.g. Artifact/Audiovisual).

Class	Definition	Appearances
Artifact		SCP-4397, SCP-4688
Audiovisual		SCP-3362
Avian		SCP-3095
Canine		SCP-4808
Crustacean		SCP-3485
Divine		SCP-4804
Ectoentropic		SCP-3339
Edifice		SCP-3248, SCP-4348, SCP-5981, SCP-5680
Event		SCP-4804
Extraterrestrial		SCP-3296, SCP-3485, SCP-4048
Geographical		SCP-3833
Humanoid		Djoric-Dmatix Proposal, SCP-2785, SCP-4799
Insectoid		SCP-3748, SCP-4148, SCP-4872
Instrument		SCP-1037
Mechanical		SCP-2785
Online		SCP-3339, SCP-4688
Memetic		SCP-4948, SCP-4785, SCP-4804
Parauniversal	Item affects or interacts with the universe anomalously.	SCP-4800, SCP-4799
Pathogen		SCP-3733
Plant		SCP-199
Reality Alteration		not_a_seagull's Proposal
Telepathic		SCP-3748
Textual		SCP-4248, SCP-4804

Additional Systems

The following subclasses are used in a variety of formats, and do not belong to a system which has been properly enunciated.

Class	Definition	Appearances
-Approaching/-Arriving/-Intruding/-Exited		SCP-1463
Eigenweapon	Item is an anomalous Weapon of Mass Destruction.	SCP-4700
Extreme		SCP-CN-266
(Informal)	Item's containment or status was achieved improperly.	DEAD WEIGHT ≡ DON'T KILL THE VIBE
(Neutralized)	Item has been neutralized but its effects persist.	SCP-3519
Paradox-Apollyon	Item will evitably destroy mankind and can be contained by the pre-emptive destruction of human life.	CODE NAME: Arbelict3
Paradox-Thaumiel	Item has been created to totally destroy human life via a localized ZK-Class Scenario.	CODE NAME: Arbelict
(Partial)	Either the item's mechanics or origin are considered non-anomalous.	SCP-5735-EX
(Provisional)		SCP-4742, SCP-5510, SCP-5682
(Unknown)	Item's location and/or properties remain undetermined.	SCP-3005

System Classes

The following classes do not describe the anomaly they are assigned, but are rather a placeholder or the result of a system error.

► System Classes ◄

Class	Definition	Appearances
	Object class has been omitted.	Di Molte Voci, Dr Gears' Proposal, Dr Weppler's Personnel File, EE-3570, SCP-1654, SCP-3682, SCP-4100, SCP-4311, URA-9611, SCP-4773-2, SCP-4787, SCP-5113, SCP-5251, SCP-5483, SCP-5552
[ASCI Classes]	Blanket entry for object classes used by the American Secure Containment Initiative.	SCP-5501, SCP-5987
[DATA EXPUNGED]		Pedantique's Proposal, SCP-2317, SCP-5790
Debated		SCP-4096, SCP-4977
HANDLE_NOT_FOUND	Item cannot be located in the Foundation database.	SCP-2718
Keter/Friend		Project Kenowhere Central Volunteer Hub
#NULL		SCP-000
Pending		McDoctorate's Proposal, SCP-ES-193, SCP-2827, SCP-3030, SCP-3557, SCP-3939, SCP-4008, SCP-4013, SCP-4430, SCP-4511, SCP-4790, SCP-4447, SCP-5006, SCP-5038, SCP-5055, SCP-5209, SCP-5221, SCP-5235, SCP-5399, SCP-5400, SCP-5410, SCP-5505, SCP-5570, SCP-5862, SCP-5900, SCP-5908, SCP-5909, SCP-5995
Placeholder		McDoctorate's Proposal
[REDACTED]		SCP-1463
Safe	Object class is being lied about.	Dr. Michaels
See Below	Item constitutes several anomalies with distinct object classes.	SCP-1399-RU, SCP-4812
Unclassed	Object classification has been intentionally avoided.	SCP-200-FR, SCP-226-FR, SCP-1375-JP, SCP-3939
Urgent reclassification required.		SCP-3547

Informal Esoteric Classes

The following classes are presumed to have been influenced by an anomalous property or another third-party; generally, they are the result of an infectious memetic agent or an infohazard.

► Informal Esoteric Classes ◄

Class	Definition	Appearances
Apologize.		S. D. Locke's Proposal
At home, Bullshit, ??		SCP-4205
Azathoth	Item is incredibly dangerous and destructive.	SCP-4626
Beautiful		SCP-2690
BFF		SCP-2790
CHALLENGE	Item may or may not pose containment challenges.	SCP-INTEGER
Containment		Site-3408
Dark Keter	Item can neither be contained nor destroyed.	SCP-5166
Delicious		SCP-5121
Dishwasher, Zenzizenzizenzic		SCP-5145
Downy		SCP-1425-765
Echelon	Item is the highest priority of the Foundation.	SCP-5055
Former		SCP-2602, which used to be a library
Friend		SCP-5121
Glorious		SCP-1561
GOD		SCP-5050
In doubt	Item's effect precludes the usage of extant object classes.	SCP-2685
Infohazardous Predator		SCP-1463
Kronecker	Item is no longer anomalous and is to be exempted from containment.	SCP-2062
Mendax		SCP-4955
Nehemoth		SCP-2998
Object Class		SCP-3890
Oblique		SCP-2786
Rapidus		Too Slow
Robertson-Jackal	Item's name has been deliberately randomized in order to contain SCP-5856, a sociokinetic entity.	SCP-5856
Scarf	Anomalous mutation if "Safe".	SCP-586
SCP-2357 poses no danger to anyone, although it very easily could have been made that way.		SCP-2357
"Shadow's Crown" Phenomenon	Object class is analogous to Thaumiel.	SCP-4098
Spiteful motherfucker		SCP-3020
Sunrays, Muted		Periapsis
UNDEFINED		UNDEFINED
Whatever you want it to be, really. You're in charge here.		SCP-3265
Youklid	Incorrect spelling of "Euclid".	SCP-4259
53	Item is highly intrusive, and has unknown capabilities and an unknown nature.	Scantron's Proposal
▄█▐██		URA-1902

Foreign Esoteric Classes

The following are object classes created by non-English affiliate branches of the Foundation which are considered "Established".⁴

Thank you to Ziakial for originally creating this list.

► Foreign Esoteric Classes ◄

Class	Definition	Appearances
Ain	Item is capable of causing YK-Class events in the future that are unable to be dealt with.	SCP-1690-JP
Aisna	Item generates anomalies, can be activated by a sentient being, and is related to a deity or reality's origin.	SCP-001-IT/ABAD
Anesidora		SCP-CN-422
Asura		Veleafer's Proposal (CN)
Atlas5	Item ensures the existence of mankind and/or the surrounding reality, and should not be restrained.	SCP-1331-RU, SCP-1399-RU
Axiom	Item is a universal truth.	R-00X's Proposal (JP)
Bakkhos	Item blurs the distinction between life and death, changing the significance and concept of containment and protection and collapsing normality.	Jiraku Mogana's Proposal (JP)
Boltzmann	Item is both necessary and inimical to the continuation of human life.	Resazurin's Proposal
Chhokmah	Item is entangled with baseline and its containment would affect intelligent entities.	SCP-CN-1900
Compromised		SCP-CN-1025
Daath		SCP-411-JP
Ether	Item's existence is not confirmed, and all information comes from witness testimony. Its containment procedures form a basis in case its existence is confirmed.	SCP-PL-206
Exist	Item is existence itself.	SCP-CN-366
Gleipnir	Item continuously requires different/new forms of containment, thereby precluding standard classification.	SCP-299-DE
Interferelessed		SCP-CN-1390
Jerusalem		Fuban's Proposal (CN)
Juggernaut	Item is capable of causing the end of the world.	SCP-654-JP
Malkuth		AdamnPluto's Proposal (CN), Okaka_Onigiri’s Proposal (JP), SCP-090-JP
Necropsar	Item currently has no reliable evidence supporting its existence in the standard Human History Process (H-001), but can be confirmed to potentially exist through observations made by the Department of Historical Observation and Planning regarding other Human History Processes and hidden signs currently in H-001.	SCP-CN-1050
Pantokratōr	Item is too large for containment to be realistic.	Indonootoko's Proposal (JP), Indonootoko's Proposal III (JP)
Tenebrarius	The Foundation does not and cannot possess information about the item.	SCP-PL-290

Footnotes

1. Translated as "Abnormal" in some foreign branches.

2. A re-engineered designation of the defunct object class of the same name.

3. Original text: Ты - аномалия, опухоль миров

4. Some translation errors may persist; informed archivists are welcome to update a foreign class' definition if they have the consent of the author or are otherwise certain of a better definition.

5. Original text: Атлант