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 unique and specialized nature. The following lists serve as a collection of these classes.
A full list of all documents cataloged under "esoteric-class" is available here. Additionally, archivists may wish to read the following recommended materials regarding anomaly classification:
Several of the following classes are self-explanatory in nature; a definition of "Uncontained" will not be included, nor will a differentiation between "Debated" and "Currently debated". If an archivist creates a new esoteric class, they are free to update the list to reflect this in the following format.
||Class||Definition (if necessary)||[[[SCP]]]||
Established Esoteric Classes
The following object classes were created by the Foundation to describe the containment of certain abnormal anomalies, or the anomalies themselves.
| Class |
Definition |
Appearances |
| Anomalous |
Item is so simplistic that it is not assigned an official database file. |
Dr. Gray's Proposal, SCP-472, SCP-1796 |
| Apollyon |
Item is uncontainable and actively causing the end of the world. |
Jim North's Proposal, Meta Ike Proposal, SCP-3999, SCP-4005, SCP-4023, SCP-4057, SCP-4485, SCP-4547, SCP-4780, S. D. Locke's Proposal |
| 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 |
| Cernnunos |
Item can be functionally contained, but the Foundation cannot achieve this for logistical and/or ethical reasons. |
SCP-4971 |
| Declassified |
Item has been revealed to the Foundation and/or public at large. |
SCP-3368, SCP-3882 |
| Decommissioned |
Item has been intentionally destroyed or deanomalized by the Foundation. |
SCP-4175, SCP-4456-D |
| 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 |
| Eparch |
Item is non-anomalous but related to the anomalous. |
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 |
| Gödel |
Item is explainable using anomalous science. |
SCP-4555 |
| Hera |
Item is hostile but very useful to the Foundation. |
SCP-4113 |
| Hiemal |
Item is used to keep other Hiemal-class items in check. Meta-discussion logged here. |
SCP-3240, SCP-3700, SCP-4121, SCP-4540 |
| Humanoid |
|
Djoric-Dmatix Proposal |
| Ignosi |
Item's discovery, even by the Foundation, must be prevented. |
Automated Passive Amnestization System Ver. 17.09 |
| 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 |
| N/A |
|
SCP-3252, SCP-3443, SCP-3930, SCP-4104. SCP-4746 |
| Netzach |
Item is Earth and its ability to support life. |
Billith's Proposal |
| Non-Anomalous |
|
WJS Proposal |
| None |
|
SCP-048, SCP-1763-EX, SCP-2165, SCP-2508 |
| Principalis |
Item constitutes the primary directive of the Foundation and the Overseer Council. |
djkaktus's Proposal III |
| 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-3396, SCP-3895 |
| Ticonderoga |
Item cannot be contained but does not need to be contained. |
SCP-4270, SCP-4444 |
| Truculent |
Item is dangerous and unpredictable. |
SCP-4703 |
| Uncontained |
|
SCP-3005, SCP-3681, SCP-4612 |
| Unknown |
|
SCP-3005, SCP-4972 |
| Unnecessary |
|
Lily's Proposal, SCP-4023 |
| 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 |
Subclasses
Some archivists have determined that the anomalies assigned to them do not entirely conform to standard containment classes. As such, several subclass systems have been created but rarely implemented.
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 |
| 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 |
| potissimi |
Item's containment is of high importance. |
SCP-2959 |
| praedico |
Item possesses clairvoyant attributes. |
SCP-1668 |
| prodest |
Item possesses useful attributes. |
SCP-066 |
| provisi |
Item is provisionally assigned a class until deemed otherwise. |
SCP-2721 |
| reliquia |
Item is an artifact or relic. |
SCP-1962 |
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 |
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.
| 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 |
| Edificial |
|
SCP-3248, SCP-4348 |
| Event |
|
SCP-4804 |
| Extraterrestrial |
|
SCP-3296, SCP-3485, SCP-4048 |
| Geographical |
|
SCP-3833 |
| Humanoid |
|
SCP-2785, SCP-4799 |
| Insectoid |
|
SCP-3748, SCP-4148 |
| Instrument |
|
SCP-1037 |
| Mechanical |
|
SCP-2785 |
| Online |
|
SCP-3339 |
| Memetic |
|
SCP-4948, SCP-4785, SCP-4804 |
| Parauniversal |
|
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; it is advised archivists consult the attached documents for reference.
| Class |
Definition |
Appearances |
| Eigenweapon |
Item is an anomalous Weapon of Mass Destruction. |
SCP-4700 |
| Paradox-Apollyon |
Item will evitably destroy mankind and can be contained by the pre-emptive destruction of human life. |
You - Anomaly, Swelling of the Worlds |
| Paradox-Thaumiel |
Item has been created to totally destroy human life via a localized ZK-Class Scenario. |
You - Anomaly, Swelling of the Worlds |
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.
| 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 |
| [DATA EXPUNGED] |
|
Pedantique's Proposal, SCP-2317 |
| Debated |
|
SCP-4096, SCP-4977 |
| HANDLE_NOT_FOUND |
Item cannot be located in the SCiPNET database. |
SCP-2718 |
| Keter/Friend |
|
Project Kenowhere Central Volunteer Hub |
| #NULL |
|
SCP-000 |
| Pending |
|
SCP-2827, SCP-3030, SCP-3557, SCP-3939, SCP-4008, SCP-4013, SCP-4430, SCP-4511, SCP-4790, SCP-4447 |
| [REDACTED] |
|
SCP-1463 |
| Safe |
Object class is being lied about. |
Dr. Michaels |
| Unclassed |
Object classification has been intentionally avoided. |
SCP-200-FR, SCP-226-FR, SCP-1375-JP, SCP-3939 |
| Urgent reclassification required. |
|
SCP-3547 |
Anomalous Esoteric Classes
The following classes are, generally, the results of infectious memetic agents and infohazards; personnel lacking a Cognitive Resistance Value (CRV) of 16.3 or greater are advised to read at their own risk.
Foreign Esoteric Classes
The Foundation is an international organization that employs researchers and archivists from almost every nation. The following are object classes created by non-English affiliates of the Foundation which are considered suitable for proper documentation.
If a foreign esoteric class falls into any of the following categories, it should not be included.
- Object class is the result of third-party manipulation, anomalous or otherwise.
- Object class is the extension of a previously-existing class, such as SCP-CN-266's "Extreme Keter" class.
- Object class is a subclass of a previously-existing class; add this to the Subclasses section.
- An article using the object class has been translated; add the class and all articles using it, translated or otherwise, to the appropriate section.
Theoretical Esoteric Classes
The following classes have not been officially implemented in any form of documentation, but have been tentatively proposed.
| Class |
Definition |
| Anatta |
Item is capable of causing a YK-End-of-the-Universe Scenario, or altering the universe in a detrimental manner. |
| Mild |
Item is almost completely safe to interact with unless handled in an irresponsible manner. |
| Simpatico |
Item is unpredictable but not dangerous. |
| Yggdrasil |
Item is capable of causing a ZK-End-of-Reality Scenario, or altering reality in a detrimental manner. |
This post, created by u/Cooldude97, was incredibly helpful in the compiling of this list. Additional resources include this Amino page by <° ~Die~ °>, this follow-up chart of object classes by u/AntazarOfQwurz, the KaktusKontainer list by 
YossiLeiner, SCP ILLUSTRATED’s video on the subject, and this forum post.
If you need any clarifications or have any questions, contact 
Nagiros over Wikidot.
