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.
While the term "Codex" was not yet used, a number of books were comparable. Like the more modern editions, they included units and rules that were compiled from White Dwarf.
Boxed set volumes
The 2nd Edition box set included three codex-style books in addition to the core rulebook.
Codices
The 2nd Edition was substantially more colourful and the new Codex books reflected this fact. More detailed information, such as background and organisation, was included, adding more depth and details to the Warhammer 40,000 universe.
Campaigns and Supplements
The 3rd Edition codices were much smaller and less detailed than the second. This is because several new races were invented and five or six codices a year could be produced.
Revisions
Some codices were amended or rewritten during 3rd Edition.
Imperial Guard
Second Codex
Chaos Space Marines
Second Codex
Campaign and Settings
Within the 3rd Edition a new type of codex was published. Rather than providing information on a specific force, these included new rules and background for environments or planetary campaigns.
With the introduction of the 4th Edition of Warhammer 40,000, the Codices have been updated and re-released. The fronts of the codices are back in a consistent style, as it was in 2nd Edition.
Blood Angels
Cover from PDF file
Campaigns and Expansion
As in 3rd Edition, the 4th Edition of the rules also introduced Expansions, codices that didn't deal with a single force but rather expanded the rules for select settings and situations.
Campaigns and Expansions
Codex Supplements
Chaos Space Marine: Black Legion
Tau Empire: Farsight Enclaves
Space Marines: Sentinels of Terra
Space Marines: Clan Raukaan
Chaos Space Marines: Crimson Slaughter
Campaigns and Expansions
Apocalypse: War Zone Damnos
Codex Supplements
Space Wolves: Champions of Fenris
Space Marines: Flesh Tearers
Space Marines: White Scars
Space Marines: Raven Guard
Space Marines: Angels of Death
Campaigns and Expansions
Apocalypse War Zone: Pandorax
Apocalypse War Zone: Valedor
Apocalypse War Zone: Damocles
Sanctus Reach: The Red Waaagh!
Sanctus Reach: Hour of the Wolf
Shield of Baal: Leviathan
Shield of Baal: Exterminatus
War Zone Damocles: Operation Shadowtalon
War Zone Damocles: Burning Dawn
War Zone Damocles: Kauyon
War Zone Damocles: Mont'ka
Black Crusade: Traitor's Hate
Black Crusade: Angel's Blade
War Zone Fenris: Curse of the Wulfen
War Zone Fenris: Wrath of Magnus
Gathering Storm: Fall of Cadia
Gathering Storm: Fracture of Biel-Tan
Gathering Storm: Rise of the Primarch
Indexes
Codices
Revisions
Chaos Space Marines: Updated Edition
Space Marines (2nd Codex)
Codex Supplements
Campaigns and Expansions
Imperium Nihilus: Vigilus Defiant
Imperium Nihilus: Vigilus Ablaze
Psychic Awakening: Phoenix Rising
Psychic Awakening: Faith and Fury
Psychic Awakening: Blood of Baal
Psychic Awakening: Ritual of the Damned
Psychic Awakening: The Greater Good
Psychic Awakening: Saga of the Beast
Psychic Awakening:Engine War
Psychic Awakening: War of the Spider
Psychic Awakening: Pariah
Codices
Supplements
Chapter Approved: Munitorum Field Manual
Chapter Approved: Grand Tournament 2020
Chapter Approved: Tactical Deployment
Chapter Approved: War Zone Nachmund Grand Tournament
Chapter Approved: War Zone Nephilim Grand Tournament
Chapter Approved: Arks of Omen Grand Tournament
Campaigns & Expansions
War Zone Charadon - Act I: The Book of Rust
War Zone Charadon - Act II: The Book of Fire
Crusade: Amidst the Ashes
War Zone Octarius - Book 1: Rising Tide
War Zone Octarius - Book 2: Critical Mass
War Zone Nachmund: Vigilus Alone
War Zone Nachmund: Rift War
Codices
Codex: Adeptus Mechanicus
Supplements
Codex Supplement: Dark Angels
Campaigns & Expansions
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