Warhammer 40,000 Homebrew Wiki

This wiki has enforced quality control policies, in order to preserve the integrity of the site and its users. You cannot be banned for breaking most of these policies (except in cases of extremely numerous repeat offenses); however, articles and stories that do not meet the requirements laid out here will be tagged and their authors will be expected fix the issues.

Canon Friendliness

Works on this site must not conflict with official Warhammer 40,000 canon, unless they are part of an alternate universe (see the "Alternate Universes" section below). Works that violate this will be tagged as "Non-Canon Friendly", or "NCF" for short.

What is Canon?

Within fiction the definition of "canon" is the material accepted as officially part of the story in the fictional universe of that story. It is often contrasted with, or used as the basis for, works of fan fiction. The alternative terms mythology, timeline, universe and continuity are often used, with the former being especially used to refer to a richly detailed fictional canon requiring a large degree of suspension of disbelief (e.g. an entire imaginary world and history), while the latter two typically refer to a single arc where all events are directly connected chronologically. Other times, the word can mean "to be acknowledged by the creator(s)."

Within the Warhammer 40,000 community, most content created or licensed by the franchise's owner, Games Workshop, Limited, is considered to be canon. However, some sources are more canon than others. This means that if two canon sources conflict each other, whichever source is considered more important or trustworthy is the one that is to be followed. This is known as a canon hierarchy. Canon hierarchies may vary from person to person, but to make things simpler, this wiki follows a single hierarchy, which is as follows:

  1. Officially released statements from Games Workshop and/or its employees
  2. Official Warhammer 40,000 Codices
  3. Dark Imperium Novels
  4. Black Library Publications
  5. Forge World Publications
  6. Official Games Workshop product descriptions & licensed third-party content (such as movies and video games)
  7. Fan-base speculation

If two sources of the same level conflict one another, the newer source overrides the older one.

  • Note on Dark Imperium lore: With the events of the Era Indomitus of M42, much of 40K universe lore has been retconned with the release of these books. Whatever lore is amended within the Dark Imperium novels or other works produced by Games Workshop or Black Library reflecting this, all other sources of lore (the newest edition of canon) is considered set-in-stone as the main canonicity of the 40K universe, with all other older sources being considered NCF or AU.

A Note On Canon

"Keep in mind Warhammer and Warhammer 40,000 are worlds where half truths, lies, propaganda, politics, legends and myths exist. The absolute truth which is implied when you talk about “canonical background” will never be known because of this. Everything we know about these worlds is from the viewpoints of people in them which are as a result incomplete and even sometimes incorrect. The truth is mutable, debatable and lost as the victors write the history…

Here’s our standard line: Yes it’s all official, but remember that we’re reporting back from a time where stories aren’t always true, or at least 100% accurate. if it has the 40K logo on it, it exists in the 40K universe. Or it was a legend that may well have happened. Or a rumour that may or may not have any truth behind it.

Let’s put it another way: anything with a 40K logo on it is as official as any Codex… and at least as crammed full of rumours, distorted legends and half-truths.

I think the real problem for me, and I speak for no other, is that the topic as a “big question” doesn’t matter. It’s all as true as everything else, and all just as false/half-remembered/sort-of-true. The answer you are seeking is “Yes and no” or perhaps “Sometimes”. And for me, that’s the end of it.

Now, ask us some specifics, eg can Black Templars spit acid and we can answer that one, and many others. But again note that answer may well be “sometimes” or “it varies” or “depends”.

But is it all true? Yes and no. Even though some of it is plainly contradictory? Yes and no. Do we deliberately contradict, retell with differences? Yes we do. Is the newer the stuff the truer it is? Yes and no. In some cases is it true that the older stuff is the truest? Yes and no. Maybe and sometimes. Depends and it varies.

It’s a decaying universe without GPS and galaxy-wide communication, where precious facts are clung to long after they have been changed out of all recognition. Read A Canticle for Liebowitz by Walter M Miller, about monks toiling to hold onto facts in the aftermath of a nuclear war; that nails it for me.
Marc Gascoigne, former head of Black Library.

This wiki considers the perception of canon described in the quote above to be the correct one. However, for the sake of simplicity, it chooses to enforce a canon hierarchy. Still, this wiki acknowledges that the hierarchical view of canon is inherently incorrect, and that the canon hierarchy laid out here should in most situations be viewed as a suggestion, not a requirement or a rule. The hierarchy's primary purpose is as a guideline for administrators when dealing with NCF content should the issue of conflicting sources become involved.

Non-Canon Friendly

Articles that contradict canon are to be tagged as Non-Canon Friendly, or NCF. In order to tag a page that is NCF, place the NCF Template at the top of the page using the shorthand code {{NCF}}, and a comment must be left on the talk page detailing the reason for the tagging. Only an administrator may remove the template, unless a page is tagged as NCF but no explanation is given within 24 hours, in which case the author of the tagged page may remove the NCF template themselves.

The use of inflammatory language (i.e. the use of language that is likely and/or clearly intended to provoke another user) when explaining an NCF tagging will result in the tagger receiving a warning. However, the tagging may remain depending on whether or not the site administration believes the issues stated by the tagger to be legitimate, although if it does remain the original explanation for the tagging will be deleted, and an administrator shall then submit their own explanation for the tagging.

After an article is marked as NCF, the author has two weeks to either fix the article or refute the tagging. After the two week period is over, a vote will be held as to whether or not the tag should be removed or the article should remain tagged and be moved into namespace. The article's author may not submit a vote, but all other users may do so.

Some things that are considered Non-Canon Friendly:

  • Claiming your Homebrew Chapter is one of the Lost Legions. [‡ See note below.]
  • Saying your Homebrew Chapter is a Grey Knights Successor Chapter
  • Saying your Homebrew Chapter is a Space Wolves Successor Chapter (Unless it is a recently created Ultima Founding Chapter. [† See note below.]
  • Saying your Homebrew Chapter is created from Dark Angels stock, but is in actuality, created from the Fallen. [†† See note below.]
  • There shall be NO 5th or 6th Founding Successor Chapters created from Dark Angels' gene-seed. During this era, the High Lords of Terra purposefully did not seek the gene-seed of the Dark Angels Chapter for either Founding, primarily due to their concerns over 'legion building', due to their unusually close-ties to their fellow Successor Chapters of the Unforgiven.
  • Claiming your Chapter was created from Traitor Legion Gene-seed (Case-by-case basis) [Θ See note below.]
  • Second Founding Chapters are hereby allowed, with the caveat that if an author chooses to write about one of these venerable Chapters, they will be held to a higher standard than the average Homebrew Chapter article. This is due to the fact that most newer contributors do not possess the writing skill, in-depth knowledge and/or the ability to create the comprehensive history necessary for such venerable Chapters. If a contributor's article fails to meet this higher standard, as determined by the 40K Homebrew Wiki staff, the article in question will be tagged with a 'Quality Issue' tag. The author of the article will have 30 days to correct the discrepencies pointed out by the moderators. If they fail to correct the deficiencies in the alotted time, the article will be deleted and moved to the user's Sandbox page. It is highly recommended that newer writers shouldn't write about a Chapter older than Third Founding.
  • Claiming your Chapter was created whole from another Chapter (Only in rare circumstances, such as the Sons of Medusa. This will be considered on a case-by-case basis, must acquire prior Admin approval.)
  • Claim your Homebrew Chapter was created from a lost company
  • Claiming your Homebrew Chapter was secretly created by a Primarch
  • Having your Homebrew Chapter fulfill the role of another Imperial organisation (The Steel Confessors, created in secret by the Adeptus Mechanicus, is a rare exception.)
  • Saying your Homebrew Chapter was Founded by someone other than the High Lords of Terra
  • Claiming that your Homebrew Chapter has cured the twin-flaws of Sanguinius
  • Claiming your Chapter is larger than 1,000 Astartes, which is a flagrant violation of the "1,000 Astartes only" rule in accordance to the Codex Astartes. Only in rare circumstance should a Chapter be allowed to be larger than 1,000 Astartes (such as the Black Templars Chapter), and only if they are a fleet-based Chapter (Subject to Admin approval, which will be considered on a case-by-case basis.)
  • Saying your Homebrew Chapter is from the First Founding.
  • Saying your Chapter are allies with the Legion of the Damned - Your Chapter CANNOT be allies of the mysterious Legion of the Damned, as they are a separate entity whose purpose and deployment are unknown to the wider Imperium, and who deploy in accordance to the Emperor's will. This mysterious band of seemingly wraith-like Space Marines appear unbidden, only when all hope seems lost, striding forth from its hidden netherworld to bring retribution to the Imperium's foes, and then just as mysteriously, disappearing as quickly as they arrived. Therefore, you cannot say your Chapter is an ally of such enigmatic Astartes.
  • Writing about future events beyond the Plague Wars - Writing about events beyond the end-date of the Plague Wars in the Era Intomitus (which is 012.M42) will be considered for all intents and purposes, non-canon. This is due to the fact that because of the recent reconning of events, this particular campaign actually occurred rather early on during the Indomitus Crusade. If an author expands beyond this known end-date, then the article in question will be tagged with a 'NCF' (Non-Canon Friendly) tag. Otherwise, if an author insists (and with the approval of the Administration) they will be allowed to write beyond this known end-date, with the caveat that their article will be tagged with an EU (Epxanded Universe) tag. [Ψ See note below]

Note on the Lost Legions - You CANNOT claim your Homebrew Chapter is one of the Lost Legions, as firmly established GW canon has already stated that the IInd and XIth Legions were deliberately expunged from all known Imperial records and archives before the onset of the Horus Heresy in ealry M31. These two Space Marine Legions were one of the first to suffer the ignominious fate of a Damnatio Memoriae (or 'Condemnation of Memory'), which is known in the modern era as an Edict of Obliteration - the policy of the deliberate destruction of icons and other symbols or monuments pertaining to an individual, usually of the Imperial elite, who has been declared Excommunicate Traitoris by the Emperor of Mankind. The most successful Edict of Obliteration carried out in Imperial history was the deletion of all records from the Imperial archives in reference to the two Lost Primarchs of the II and XI Space Marine Legions. The records of these two Primarchs and the II and XI Legions were so effectively purged that ten millennia later their transgressions against the Imperium of Man are still known only to the God-Emperor Himself. Therefore, it would be impossible for a Successor Chapter descended from the heritage of these two purged Space Marine Legions to exist, ten millennia later, in the modern M42, and it would be highly improbable any existing records in regards to these two expunged Legions would still exist as well.

Note on Space Wolves Gene-Seed & Successor Chapters - The Space Wolves were unable to created additional Successor Chapters due to the Space Wolves Canis Helix in their gene-seed, which can cause them to spontaneously mutate into lupine creatures, called Wulfen. After the disaster that occurred to their only known Successor Chapter, the Second Founding Wolf Brothers, who spontaneously mutated into ravenous Wulfen, they were hunted to extinction by the Space Wolves or chased into the Eye of Terror. Also, during the First Battle of the Fang in early M32, when the Thousand Sons attacked Fenris, the Daemon Primarch, Magnus the Red, destroyed the irreplaceable fleshworks machines in the Fang, that the Wolf Priests were utilising to create a new generation of Space Wolves, with the defects of the Canis Helix removed. With the death of the Wolf Priest who knew more about the Canis Helix than anyone alive, at that time, the secrets of the Space Wolves' gene-seed wouldn't be unlocked until Archmagos Belisarius Cawl revealed the Primaris Space Marines created from all the original gene-stocks of the First Founding Legions at the end of M41.

†† Note on Dark Angels Gene-Seed & The Fallen - Despite the Dark Angels possessing gene-seed that is one of the purest and least degraded of all, rumours continue to persist of nepotism and legion building. Over time these factors have led to the Unforgiven being regarded with distrust. Despite their impeccably pure gene-seed, the Dark Angels have been passed over for many of the Foundings that have created fresh Chapters to fight the Imperium's wars. Yet from time to time the Adeptus Terra have been forced to permit the Dark Angels another Founding, the records of which have mysteriously vanished shortly afterward. In this way, an uncertain number of Unforgiven Chapters have been created, each giving every outward appearance of fighting their own wars for the Imperium, while secretly aiding in the Dark Angels' hidden hunt. One must keep in mind that the Dark Angels' arch-enemies, the Fallen Angels (or the Fallen), are the original Calibanite Dark Angels that turned against Lion El'Jonson at the end of the Horus Heresy and attacked his returning fleet from the wars of the Heresy, which inevitably resulted in the destruction of their Legion homeworld of Caliban. In the end, the Ruinous Powers scattered the Fallen across time and space. The Dark Angels feel that until these erstwhile Heretic Astartes are all captured and forced to repent, they will be seen as 'Unforgiven' in the eyes of the Emperor and the Lion. Therefore, there would be NO plausible explanation or scenario for a Chapter EVER being created from the gene-stock of these treacherous Astartes. The Dark Angels and their fellow Unforgiven would never countenance the existence of such an aberration, plus, they would do their utmost to either capture or wipe out those who are members of the Fallen.

Θ Note on Chapters descended from Traitor gene-stock - These types of Chapters will be considered on a case-by-case basis, however, it is generally discouraged to write about a loyalist Chapter descended from the lineage of one of the Traitor Legions. The simplest reason for not using Traitor gene-seed for your Homebrew Chapter is that the Imperium has a massive stock of Loyalist gene-seed. You must state your case to the Wiki Admins in regards to writing about such a Chapter, and once approved, you are then allowed to incorporate a Traitor Legion's lineage into your Chapter's lore. (NOT BEFORE ADMIN APPROVAL!) It's okay to have your Chapter not know its gene-seed origin and hint at the idea of Traitor origins, but at no point do you want to outright say it. It's best to occlude a Chapter's origins and keep it mysterious, as this is much more inventive and makes your Chapter much more believable and interesting.

(See detailed explanation here)

Ψ Note on the chronology of the Era Indomitus - As originally chronicled in the Dark Imperium novel series by Guy Haley published in 2017-2018 early in the 8th Edition of Warhammer 40,000, the Indomitus Crusade lasted for roughly 100 standard years and ended with the Plague Wars. However in 2021 Black Library retconned the events of the novels to take place only 12 standard years after the crusade had begun, now with no end date for the conflict. This change now places the events of the Plague Wars in circa 012.M42 early in the Indomitus Crusade by the chronology of the original Imperial Calendar.

Note: For more a more detailed explanations, please refer to the Wiki's Guide Portal and the individual 'How To' Guides.

Expanded & Alternate Universes

Expanded Universes

An Expanded Universe or EU is collection of homebrew, fan-made works which expand upon established canon, but does not contradict it. All works on this site are considered to be part of a user's own personal Expanded Universe unless otherwise stated. Note that because of this you may not link to another user's work unless you have that user's permission. Repeatedly linking (three times or more) to another user's work without their consent will be treated as a form of plagiarism. The exception are pages that have been specifically marked by their author to be open for community use, and can thus be linked to or constructively edited by anyone without repercussions.

This wiki also allows users to create collaborative Expanded Universes. Collaborative EUs allow multiple users to contribute to a shared Expanded Universe. Different collaborative EUs may have different entry requirements, some may have none at all and allow anyone to contribute, while others may require users to have been invited or that they submit an entry application. Collaborative EUs may also impose additional quality control requirements in addition to the ones laid out here (conversely, they may NOT attempt to exempt themselves from any site policies). However, collaborative EUs cannot require their participants to contribute all of their work on this site to the EU, regardless of whether or not that includes their work prior to joining the EU. The site administration believes this to be unreasonable as well as potentially detrimental to one's experience on the site.

Alternate Universes

Alternate Universes (AU for short), unlike Expanded Universes, DO diverge significantly from established canon. While AUs are a tricky subject, in short, this wiki does allow them. However, AUs must be collaborative projects (with a minimum of six active contributors) centered around a core idea that differentiates the AU from established canon. For example, the Dornian Heresy project started by Aurelius Rex over on the Bolter and Chainsword forum, takes familiar Primarchs and Space Marine Legions meet very different fates. In this twisted alternate timeline Warmaster Horus was able to cast off the daemonic influences that sought to possess him, and where the Ruinous Powers were instead forced to corrupt Rogal Dorn instead to overthrow the Emperor.. AUs are NOT to be used to exempt one's content from the Canon Policy. This is why AUs must have a core idea that is clearly outlined in the AU's central project page.

Current Timeline

In accordance to recent canon, it is mentioned in the novel "Dark Imperium" by Guy Haley, that the Indomitus Crusade of the resurrected Ultramarines Primarch Roboute Guilliman (though far from done) had taken 112 years of hard campaigning and that this campaign nearing its logical conclusion. Keep in mind, these dates are all relative, as they explained in "Dark Imperium", but since no one knows exactly what the actual year is due to accurate records keeping kinda going out the window several millennia earlier (something that Guilliman is trying to fix).

As far as the latest date in M42 goes, since it takes place exactly a century after the events of the 13th Black crusade in 999.M41, that would place the latest year as ca. (circa) 111.M42. Following the Battle of the Pit of Raukos, this is when Guilliman declares the official end of the Indomitus Crusade and the disbandment of the Unnumbered Sons (Primaris Space Marines) so that he could then take part in the Plague Wars still raging in his own Realm of Ultramar.

Therefore, the furthest cut-off day that our contributors here on the WH40K Homebrew Wiki is allowed to write about shall not exceed 111.M42. Anyone who does so, will have their article tagged with an EU (Expanded Universe) tag (case-by-case basis) or in some cases, will have their article tagged with a Non-Canon tag and will have to remove the offending subject matter all together.


Crossovers are not allowed on this wiki under any circumstances. This wiki is meant for fan-works involving Warhammer 40,000 only. While you may make references to other fictional universes in your work here, you may not outright include elements from them.

Despite its obvious connections to Warhammer 40,000, Warhammer Fantasy is still considered to be a separate universe, and crossovers with Warhammer Fantasy are therefore not allowed. The only exception to this are characters, concepts, and items which exist both in Warhammer 40,000 and in Warhammer Fantasy, such as (but not limited to) the Forces of Chaos, the Chaos Gods, and various Chaos Daemons. As these elements also exist in Warhammer 40,000 canon, they may be included without your work being considered a crossover.

If you are set on writing a crossover story and are unwilling to write about Warhammer 40,000 only, there are numerous other websites on which you may post your ideas and content, such as fanfiction.net or deviantart.com.

Note: Portions of the text here has been copied from the affiliate Warhammer 40K Fanon Wiki under the Fair Use doctrine. No challenge to their status intended.

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