Codex (Warhammer 40,000)


A codex, in the Warhammer 40,000 tabletop wargame, is a rules supplement containing information concerning a particular army, environment, or worldwide campaign.
Codices for particular armies were introduced for the second edition of the game. The third edition rendered these obsolete, and a new series began, including introducing codices for battle zones and campaigns. Until superseded by newer versions, the 3rd edition and later codices remained valid for the newer editions of Warhammer 40,000. Games Workshop no longer produce campaign or battle zone codices, instead releasing 'expansions'. 'Codex' is now a term solely used for army books.
At the launch of 8th edition all previous codices were replaced with index books due to a major rules overhaul. The indices were subsequently replaced by a new series of codices. As before, these codices remained valid until superseded by newer versions.
The format of the codices has varied somewhat over the years. The most common elements between iterations include:
  • Background - Information about the force and its place in the Warhammer 40,000 universe. This includes artwork, short stories, and copies of fictional documents from the future.
  • Miniature Showcase - Originally a hobby section providing information on collecting, building and painting an army. Later a selection of photographs of Citadel Miniatures painted by Games Workshop's 'Eavy Metal team.
  • Rules - Delivered in varying forms between editions. In earlier editions: a bestiary, alongside an army list. Since 7th edition, rules for each unit have been delivered on a datasheet. All other army rules and points are listed separately in sections before and after the datasheets.
Codex supplements provide additional rules for sub-factions of a parent army. These might include special characters or units and other special rules that are only available to that particular sub-faction.
Rules for models produced by Forgeworld are available as part of the Imperial Armour series of books, also published by Forgeworld. Rules for models no longer supported by codices and supplements can be found in Warhammer Legends on the Warhammer Community website.

Current Books

Army Codices

The range of codices is regularly updated with new editions of armies and occasionally new army codices. Codices designed for a prior edition of Warhammer 40,000 are still valid in the current edition, unless a later version has replaced it. Codex Supplements have their parent faction noted in brackets.

10th Edition

10th Edition was released in June 2023.
CodexISBNRelease dateNumber of Pages
Space Marines216
Tyranids120
Adeptus Mechanicus120
Necrons136
T'au136
Adeptus Custodes112
Orks152
Chaos Space Marines160
Genestealer Cults120
Adepta Sororitas129
Imperial Agents128
Aeldari
Astra Militarum
Emperor’s Children
World Eaters
Death Guard
Thousand Sons
Chaos Knights
Grey Knights
Leagues of Votann
Imperial Knights
Drukhari

Codex SupplementISBNRelease dateNumber of Pages
Dark Angels 96
Blood Angels 104
Space Wolves
Black Templars

Expansions

Expansions for Warhammer 40,000 provide alternative ways to play the game. Rules in expansions remain valid unless superseded by a newer publication.

Imperial Armour

For main article see Imperial Armour
Imperial Armour is a series of official rules supplements to Warhammer 40,000 Codices produced by Forge World, a subsidiary company of Games Workshop. Current, valid books:

Obsolete Books

Codices

9th Edition

9th Edition was released in July 2020. All codices were rendered obsolete by 10th edition Warhammer 40,000. 10th Edition was released June 2023. Codex Supplements have their parent faction noted in brackets.
CodexISBNRelease dateSuperseded By
Necrons10th Edition Index: Necrons
Space Marines10th Edition Index: Space Marines
Death Guard10th Edition Index: Death Guard
Drukhari10th Edition Index: Drukhari
Adeptus Mechanicus10th Edition Index: Adeptus Mechanicus
Adepta Sororitas10th Edition Index: Adepta Sororitas
Grey Knights10th Edition Index: Grey Knights
Thousand Sons10th Edition Index: Thousand Sons
Orks10th Edition Index: Orks
Adeptus Custodes10th Edition Index: Adeptus Custodes
Genestealer Cults10th Edition Index: Genestealer Cults
Tau Empire10th Edition Index: T'au Empire
Aeldari10th Edition Index: Aeldari
Tyranids10th Edition Index: Tyranids
Chaos Knights10th Edition Index: Knight Households
Imperial Knights10th Edition Index: Knight Households
Chaos Space Marines10th Edition Index: Chaos Space Marines
Chaos Daemons10th Edition Index: Chaos Daemons
Leagues of Votann10th Edition Index: Leagues of Votann
Astra Militarum10th Edition Index: Astra Militarum
World Eaters10th Edition Index: World Eaters

Codex SupplementISBNRelease dateSuperseded By
Deathwatch 10th Edition Index: Deathwatch
Space Wolves 10th Edition Index: Space Wolves
Blood Angels 10th Edition Index: Blood Angels
Dark Angels 10th Edition Index: Dark Angels
Black Templars 10th Edition Index: Black Templars

8th Edition

8th Edition was released June 2017.
CodexISBNRelease dateSuperseded By
Adeptus Custodes9th Edition Codex: Adeptus Custodes
Adepta Sororitas9th Edition Codex: Adepta Sororitas
Adeptus Mechanicus9th Edition Codex: Adeptus Mechanicus
Astra Militarum9th Edition Codex: Astra Militarum
Blood Angels9th Edition Codex: Space Marines
Chaos Daemons9th Edition Codex: Chaos Daemons
Chaos Knights9th Edition Codex: Chaos Knights
Chaos Space Marines8th Edition Codex: Chaos Space Marines
Chaos Space Marines 9th Edition Codex: Chaos Space Marines
Craftworlds9th Edition Codex: Aeldari
Dark Angels9th Edition Codex: Space Marines
Death Guard9th Edition Codex: Death Guard
Deathwatch9th Edition Codex: Space Marines
Drukhari9th Edition Codex: Drukhari
Elucidian Starstriders10th Edition Index: Imperial Agents
Gellerpox InfectedN/A
Genestealer Cults9th Edition Codex: Genestealer Cults
Grey Knights9th Edition Codex: Grey Knights
Harlequins9th Edition Codex: Aeldari
Imperial Knights9th Edition Codex: Imperial Knights
Necrons9th Edition Codex: Necrons
Orks9th Edition Codex: Orks
Space Marines8th Edition Codex: Space Marines
Space Marines 9th Edition Codex: Space Marines
Space Wolves9th Edition Codex: Space Marines
Tau Empire9th Edition Codex: Tau Empire
Thousand Sons9th Edition Codex: Thousand Sons
Tyranids9th Edition Codex: Tyranids

Codex SupplementISBNRelease dateSuperseded By
Imperial Fists 10th Edition Index: Space Marines
Iron Hands 10th Edition Index: Space Marines
Ravenguard 10th Edition Index: Space Marines
Salamanders 10th Edition Index: Space Marines
Ultramarines 10th Edition Index: Space Marines
White Scars 10th Edition Index: Space Marines

IndexFactionsISBNRelease dateSuperseded By
ChaosHeretic Astartes, Chaos Daemons & Questor Traitoris8th Edition Chaos codexes
Imperium 18th Edition Imperium codexes
Imperium 28th Edition Imperium codexes
Xenos 1Craftworlds, Drukhari, Ynnari, Harlequins & Necrons8th Edition Xenos codexes
Xenos 2Orks, Tau Empire, Tyranids & Genestealer Cults8th Edition Xenos codexes

7th Edition

All codices were rendered obsolete by 8th edition Warhammer 40,000. 7th Edition was released May 2014. Codex Supplements have their parent faction noted in brackets.
CodexISBNRelease dateSuperseded By
Blood AngelsDecember 20148th Edition Index: Imperium 1
Cult MechanicusMay 20158th Edition Index: Imperium 2
CraftworldsApril 20158th Edition Index: Xenos 1
Dark AngelsJune 20158th Edition Index: Imperium 1
Dark EldarOctober 20148th Edition Index: Xenos 1
DeathwatchAugust 20168th Edition Index: Imperium 1
Genestealer CultsOctober 20168th Edition Index: Xenos 2
Grey KnightsAugust 20148th Edition Index: Imperium 1
HarlequinsFebruary 20158th Edition Index: Xenos 1
Imperial AgentsDecember 20168th Edition Index: Imperium 1 & 2
Imperial KnightsMay 20158th Edition Index: Imperium 2
Khorne DaemonkinMarch 20158th Edition Index: Chaos
NecronsJanuary 20158th Edition Index: Xenos 1
OrksJune 20148th Edition Index: Xenos 2
SkitariiApril 20158th Edition Index: Imperium 2
Space MarinesJune 20158th Edition Index: Imperium 1
Space WolvesAugust 20148th Edition Index: Imperium 1
Tau EmpireOctober 20158th Edition Index: Xenos 2

6th Edition

6th Edition was released June 2012. Codex Supplements have their parent faction noted in brackets.
CodexISBNRelease dateSuperseded By
Adepta SororitasOctober 20138th Edition Index: Imperium 2
Astra MilitarumApril 20148th Edition Index: Imperium 2
Chaos DaemonsMarch 20138th Edition Index: Chaos
Chaos Space MarinesOctober 20128th Edition Index: Chaos
Dark AngelsJanuary 20137th Edition Codex: Dark Angels
EldarJune 20137th Edition Codex: Craftworlds
Imperial KnightsMarch 20147th Edition Codex: Imperial Knights
InquisitionNovember 20138th Edition Index: Imperium 2
Legion of the DamnedFebruary 20148th Edition Index: Imperium 1
Militarum TempestusMars 20148th Edition Index: Imperium 2
Space MarinesSeptember 20137th Edition Codex: Space Marines
Tau EmpireApril 20137th Edition Codex: Tau Empire
TyranidsJanuary 20148th Edition Index: Xenos 2

Codex SupplementISBNRelease dateSuperseded By
Black Legion (Chaos Space Marines)August 20137th Edition Revised Version
Clan Raukaan (Space Marines)November 20137th Edition Revised Version
Crimson Slaughter (Chaos Space Marines)March 20147th Edition Revised Version
Farsight Enclaves (Tau Empire)July 20137th Edition Revised Version
Iyanden (Eldar)June 20137th Edition Codex: Craftworlds
Sentinels of Terra (Space Marines)November 20137th Edition Revised Version

5th Edition

5th Edition was released in 2008.
CodexISBNRelease dateSuperseded By
Blood AngelsApril 20107th Edition Codex: Blood Angels
Dark EldarNovember 20107th Edition Codex: Dark Eldar
Grey KnightsApril 20117th Edition Codex: Grey Knights
Imperial GuardMay 20096th Edition Codex: Astra Militarum
NecronsNovember 20117th Edition Codex: Necrons
Sisters of BattleN/A - White DwarfAugust/September 20116th Edition Codex: Adepta Sororitas
Space MarinesOctober 20086th Edition Codex: Space Marines
Space WolvesOctober 20097th Edition Codex: Space Wolves
TyranidsJanuary 20106th Edition Codex: Tyranids

4th Edition

4th Edition was released in 2004. Codex Supplements have their parent faction noted in brackets.
CodexISBNRelease dateSuperseded By
Black TemplarsNovember 20056th Edition Codex: Space Marines
Blood AngelsN/A - White DwarfJune/July 20075th Edition Codex: Blood Angels
Chaos DaemonsMay 20086th Edition Codex: Chaos Daemons
Chaos Space MarinesSeptember 20076th Edition Codex: Chaos Space Marines
Dark AngelsMarch 20076th Edition Codex: Dark Angels
EldarNovember 20066th Edition Codex: Eldar
OrksJanuary 20087th Edition Codex: Orks
Space MarinesNovember 20045th Edition Codex: Space Marines
Tau EmpireMarch 20066th Edition Codex: Tau Empire
TyranidsJune 20055th Edition Codex: Tyranids

Codex SupplementISBNRelease dateSuperseded By
Catachans 20055th Edition Codex: Imperial Guard

3rd Edition

3rd Edition was released in 1998. Codex Supplements have their parent faction noted in brackets.
CodexISBNRelease dateSuperseded By
Chaos Space MarinesFebruary 19993rd Edition Codex
Chaos Space Marines October 20024th Edition Codex
DaemonhuntersMarch 20035th Edition Codex: Grey Knights
Dark EldarNovember 19983rd Edition Codex
Dark Eldar November 20035th Edition Codex
EldarAugust 19994th Edition Codex
Imperial GuardNovember 19993rd Edition Codex
Imperial Guard September 20035th Edition Codex
NecronsJuly 20025th Edition Codex
OrksJuly 19994th Edition Codex
Space MarinesOctober 19984th Edition Codex
TyranidsFebruary 20014th Edition Codex
TauOctober 20014th Edition Codex: Tau Empire
Witch HuntersApril 20045th Edition Codex: Sisters of Battle

Codex SupplementISBNRelease dateSuperseded By
AssassinsJuly 1999Codex: Daemonhunters / Witch Hunters
Blood Angels December 19984th Edition Codex
Catachans February 20004th Edition Codex
Craftworld Eldar June 20004th Edition Codex: Eldar
Dark Angels May 19993rd Edition Codex
Dark Angels Nov 20024th Edition Codex
Space Wolves April 20005th Edition Codex

2nd Edition

All codices were rendered obsolete by 3rd Edition Warhammer 40,000. 2nd Edition was released in 1993.
CodexISBNRelease date
Angels of DeathJanuary 1996
ChaosJuly 1996
EldarApril 1994
Imperial GuardNovember 1995
OrksJuly 1994
Sisters of BattleAugust 1997
TyranidsAugust 1995
UltramarinesApril 1995
Space WolvesJanuary 1994

Codex SupplementISBNRelease date
AssassinsDecember 1997

Expansions/Supplements

9th Edition

All 9th Edition expansions were superseded by 10th Edition, with the exception of the Arks of Omen "Boarding Actions" rules.
BookNotesISBNRelease date
War Zone Charadon Act 1: The Book of RustCampaign & Death Guard, Adeptus Mechanicus,
Imperial Knights, Chaos Knights, Drukhari Rules
War Zone Charadon Act 2: The Book of FireCampaign & Adeptus Mechanicus, Adeptus Sororitas,
Be'lakor, Chaos Space Marines Rules
War Zone Octarius Book 1: Rising TideCampaign & Astra Militarum, Deathwatch,
Fortification, Inquisition, Tyranids Rules
War Zone Octarius Book 2: Critical MassCampaign & Astra Cartographica, Orks Rules

7th Edition

All 7th Edition expansions were superseded by 8th Edition.
BookNotesISBNRelease date
Black Crusade: Angel's BladeBlood Angels UpdateSeptember 2016
Black Crusade: Traitor's HateChaos Space Marines UpdateSeptember 2016
Blood OathWarhammer World CampaignMay 2015
Death from the SkiesExpanded Rules for FlyersMay 2016
Death MasqueDeathwatch vs HarlequinsN/A - BoxsetAugust 2016
Gathering Storm: Fall of CadiaNarrative Campaign of Fall of CadiaJanuary 2017
Gathering Storm: Fracture of Biel-tanNarrative CampaignFebruary 2017
Gathering Storm: Rise of the PrimarchNarrative CampaignMarch 2017
Kill TeamSmall Skirmish GamesN/A - BoxsetSeptember 2016
Path to GloryCampaignDigital EditionDecember 2015
Planetary OnslaughtPlanetstrike, Cities of Death CompendiumNovember 2016
PlanetstrikeSanctus Reach Planetstrike CompendiumDigital EditionSeptember 2014
Sanctus Reach: Hour of the WolfPlanetrike Missions and Space WolvesAugust 2014
Sanctus Reach: The Red Waaagh!Planetstrike Rules and OrksJuly 2014
Sanctus Reach: StormclawSpace Wolves vs OrksN/A - BoxsetJuly 2014
Shield of Baal: DeathstormBlood Angels vs TyranidsN/A - BoxsetDecember 2014
Shield of Baal: ExterminatusBlood Angels and Necrons DetachmentsDecember 2014
Shield of Baal: LeviathanCities of Death and Tyranids UpdateNovember 2014
War Zone Fenris: Curse of the WulfenSpace Wolves and Daemons UpdatesFebruary 2016
War Zone Fenris: Wrath of MagnusThousand Sons and Daemons UpdateDecember 2016
War Zone Damocles: Burning DawnTau EmpireN/A - BoxsetNovember 2015
War Zone Damocles: KauyonTau Empire and Space Marines UpdatesNovember 2015
War Zone Damocles: Mont'kaTau, Astra Militarum and Assassins UpdatesNovember 2015
War Zone Damocles: Operation ShadowtalonRaven GuardN/A - BoxsetNovember 2015

3rd Edition

Battlezone
Battlezone codices were rules supplements that dealt with a specialised combat environment, instead of an army. There was only ever one produced. However, material in Codex: Catachans provides rules for jungle warfare. The concept of a battlezone codex was replaced by Games Workshop's Expansions.
CodexISBNRelease dateSuperseded By
CityfightSeptember 20014th edition expansion Cities of Death
3rd Edition Events
The two event codices were released in association with the 2000 and 2003 Worldwide Campaigns. These codices provided background and special gaming rules for the event, along with four "supplemental army lists"; variant armies that required access to certain other codices for use.
CodexObsolete Army ListsISBNRelease dateSuperseded By
ArmageddonBlack Templars, Salamanders, Speed Freeks, Armageddon Imperial GuardAugust 20004th Edition Codex: Space Marines; Black Templars; Orks and 5th Edition Codex: Imperial Guard
Eye of TerrorLost and the Damned, Ulthwé Strike Force, Cadian Shock Troops, 13th CompanyJune 20034th Edition Codex: Eldar; Chaos Space Marines and 5th Edition Codex: Imperial Guard; Space Wolves