|This article is about the rulebook, for the short story by Graham McNeill see Codex (Short Story)|
Codex (plural "codices", but "codexes" is also occasionally used) is the name of a source book for Warhammer 40,000 armies and factions containing background information, pictures, and rules.
Since its creation in the 1980s, Warhammer 40,000 has had seven distinct versions or editions. With each edition, the Codex of each army has changed to reflect the new rules and units.
Usually one codex is valid until a revision is made, so all codexes from the 6th, 5th, 4th and 3rd Editions of Warhammer 40,000 are still valid in the current, 7th Edition, unless a later version has replaced it. There have been instances of codices that are not "standalone". They were known as "mini-dexes". These were usually army lists that were variants of a mainstream army. An example would be the early 3rd Edition Codex: Catachans, which required the main Codex: Imperial Guard to use. Mini-dexes are more or less extinct nowadays.
Full List of Codices
Current List of Codices and Expansions
This is the list of codices which can be used to play today.
Current Army Codices
8th Edition Indexes
8th Edition Codices
8th Edition Expansions
- Codices (List) - For a list of all released Codices.