# Codex (Warhammer 40,000)

A codex (pluralized as codexes by Games Workshop), 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 Until superseded by newer versions, the 3rd edition and later codices remained valid for the newer editions of Warhammer 40,000.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 (as of November 2019 these indices are no longer produced). 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 As before, these codices remained valid until superseded by newer versions.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 (descriptions of units, characters and vehicles with special rules and background information), alongside an army list (providing options and points costs for units in the bestiary). Since 7th edition, rules for each unit have been delivered on a datasheet (a concise page detailing all stats, equipment, options and special rules for a unit). 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.
| Codex | ISBN | Release Date | Number of Pages |
| Space Marines | 978-1-80457-238-2 | September 16, 2023 | 216 |
| Tyranids | 978-1-80457-231-3 | September 2023 | 120 |
| Adeptus Mechanicus | 1-80457-278-0 | November 2023 | 120 |
| Necrons | 1-80457-287-X | November 2023 | 136 |
| T'au | 1-80457-352-3 | March 2024 | 136 |
| Adeptus Custodes | 978-1-80457-336-5 | April 2024 | 112 |
| Orks | 1-80457-320-5 | April 2024 | 152 |
| Chaos Space Marines | 1-80457-328-0 | May 2024 | 160 |
| Genestealer Cults | 1-80457-388-4 | June 2024 | 120 |
| Adepta Sororitas | 1-80457-396-5 | June 2024 | 129 |
| Imperial Agents | 1-80457-411-2 | August 2024 | 128 |
| Codex Supplement | ISBN | Release Date | Number of Pages |
| Dark Angels (Space Marines) | 1-80457-311-6 | February 2024 | 96 |
| Blood Angels (Space Marines) | 1-80457-444-9 | October 2024 | 104 |

### Expansions

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 Rules in expansions remain valid unless superseded by a newer publication.

#### 10th Edition

| Book | Notes | ISBN | Release Date |
| Crusade: Tyrannic War | Campaign Rules | 1-80457-186-5 | June 2023 |
| Crusade: Pariah Nexus | Campaign Rules | 1-80457-271-3 | January 2024 |
| Boarding Actions | Updated Boarding Actions material | 978-1-80457-404-1 | August 2024 |

#### 9th Edition

| Book | Notes | ISBN | Release Date |
| Arks of Omen: Abaddon | Campaign & Boarding Actions Rules | 1-83906-934-1 | January 2023 |
| Arks of Omen: Angron | Campaign & Boarding Actions Rules | 1-80457-041-9 | March 2023 |
| Arks of Omen: Vashtorr | Campaign & Boarding Actions Rules | 1-80457-090-7 | March 2023 |
| Arks of Omen: Farsight | Campaign & Boarding Actions Rules | 1-80457-124-5 | 2023 |
| Arks of Omen: The Lion | Campaign & Boarding Actions Rules | 1-80457-140-7 | 2023 |

### 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:
| Imperial Armour | Notes | ISBN | Release Date |

## Obsolete Books
### Codices
#### 9th Edition

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.
| Codex | ISBN | Release Date | Superseded By |
| Necrons | 978-1-83906-078-6 | October 2020 | 10th Edition Index: Necrons |
| Space Marines | 978-1-83906-069-4 | October 2020 | 10th Edition Index: Space Marines |
| Death Guard | 978-1-83906-137-0 | January 2021 | 10th Edition Index: Death Guard |
| Drukhari | 978-1-83906-189-9 | March 2021 | 10th Edition Index: Drukhari |
| Adeptus Mechanicus | 978-1-83906-323-7 | May 2021 | 10th Edition Index: Adeptus Mechanicus |
| Adepta Sororitas | 978-1-83906-339-8 | June 2021 | 10th Edition Index: Adepta Sororitas |
| Grey Knights | 978-1-83906-153-0 | August 2021 | 10th Edition Index: Grey Knights |
| Thousand Sons | 978-1-83906-145-5 | August 2021 | 10th Edition Index: Thousand Sons |
| Orks | 978-1-83906-347-3 | September 2021 | 10th Edition Index: Orks |
| Adeptus Custodes | 978-1-83906-384-8 | January 2022 | 10th Edition Index: Adeptus Custodes |
| Genestealer Cults | 978-1-83906-376-3 | January 2022 | 10th Edition Index: Genestealer Cults |
| Tau Empire | 978-1-83906-631-3 | February 2022 | 10th Edition Index: T'au Empire |
| Aeldari | 978-1-83906-578-1 | March 2022 | 10th Edition Index: Aeldari |
| Tyranids | 978-1-83906-615-3 | April 2022 | 10th Edition Index: Tyranids |
| Chaos Knights | 978-1-83906-599-6 | May 2022 | 10th Edition Index: Knight Households |
| Imperial Knights | 978-1-83906-607-8 | May 2022 | 10th Edition Index: Knight Households |
| Chaos Space Marines | 978-1-83906-806-5 | July 2022 | 10th Edition Index: Chaos Space Marines |
| Chaos Daemons | 978-1-83906-797-6 | September 2022 | 10th Edition Index: Chaos Daemons |
| Leagues of Votann | 978-1-83906-578-1 | November 2022 | 10th Edition Index: Leagues of Votann |
| Astra Militarum | 978-1-80457-081-4 | November 2022 | 10th Edition Index: Astra Militarum |
| World Eaters | 978-1-80457-049-4 | February 2023 | 10th Edition Index: World Eaters |
| Codex Supplement | ISBN | Release Date | Superseded By |
| Deathwatch (Space Marines) | 978-1-83906-105-9 | November 2020 | 10th Edition Index: Deathwatch |
| Space Wolves (Space Marines) | 978-1-83906-113-4 | November 2020 | 10th Edition Index: Space Wolves |
| Blood Angels (Space Marines) | 978-1-83906-121-9 | December 2020 | 10th Edition Index: Blood Angels |
| Dark Angels (Space Marines) | 978-1-83906-129-5 | January 2021 | 10th Edition Index: Dark Angels |
| Black Templars (Space Marines) | 978-1-83906-449-4 | November 2021 | 10th Edition Index: Black Templars |

#### 8th Edition

8th Edition was released June 2017.
| Codex | ISBN | Release Date | Superseded By |
| Adeptus Custodes | 978-1-78826-135-7 | February 2018 | 9th Edition Codex: Adeptus Custodes |
| Adepta Sororitas | 978-1-78826-686-4 | November 2019 | 9th Edition Codex: Adepta Sororitas |
| Adeptus Mechanicus | 978-1-78826-017-6 | September 2017 | 9th Edition Codex: Adeptus Mechanicus |
| Astra Militarum | 978-1-78826-028-2 | October 2017 | 9th Edition Codex: Astra Militarum |
| Blood Angels | 978-1-78826-050-3 | December 2017 | 9th Edition Codex: Space Marines |
| Chaos Daemons | 978-1-78826-123-4 | January 2018 | 9th Edition Codex: Chaos Daemons |
| Chaos Knights | 978-1-78826-612-3 | July 2019 | 9th Edition Codex: Chaos Knights |
| Chaos Space Marines | 978-1-78581-938-4 | August 2017 | 8th Edition Codex: Chaos Space Marines (2nd Edition) |
| Chaos Space Marines (2nd Edition) | 978-1-78826-467-9 | March 2019 | 9th Edition Codex: Chaos Space Marines |
| Craftworlds | 978-1-78826-033-6 | November 2017 | 9th Edition Codex: Aeldari |
| Dark Angels | 978-1-78826-055-8 | December 2017 | 9th Edition Codex: Space Marines |
| Death Guard | 978-1-78826-005-3 | September 2017 | 9th Edition Codex: Death Guard |
| Deathwatch | 978-1-78826-185-2 | May 2018 | 9th Edition Codex: Space Marines |
| Drukhari | 978-1-78826-170-8 | April 2018 | 9th Edition Codex: Drukhari |
| Elucidian Starstriders | — | September 2018 | 10th Edition Index: Imperial Agents |
| Gellerpox Infected | — | September 2018 | N/A |
| Genestealer Cults | 978-1-78826-396-2 | February 2019 | 9th Edition Codex: Genestealer Cults |
| Grey Knights | 978-1-78581-927-8 | August 2017 | 9th Edition Codex: Grey Knights |
| Harlequins | 978-1-78826-213-2 | May 2018 | 9th Edition Codex: Aeldari |
| Imperial Knights | 978-1-78826-164-7 | June 2018 | 9th Edition Codex: Imperial Knights |
| Necrons | 978-1-78581-966-7 | April 2018 | 9th Edition Codex: Necrons |
| Orks | 978-1-78826-262-0 | November 2018 | 9th Edition Codex: Orks |
| Space Marines | 978-1-78581-949-0 | August 2017 | 8th Edition Codex: Space Marines (2nd Edition) |
| Space Marines (2nd Edition) | 978-1-78826-630-7 | August 2019 | 9th Edition Codex: Space Marines |
| Space Wolves | 978-1-78826-060-2 | September 2018 | 9th Edition Codex: Space Marines |
| Tau Empire | 978-1-78826-158-6 | March 2018 | 9th Edition Codex: Tau Empire |
| Thousand Sons | 978-1-78826-141-8 | February 2018 | 9th Edition Codex: Thousand Sons |
| Tyranids | 978-1-78826-038-1 | November 2017 | 9th Edition Codex: Tyranids |
| Codex Supplement | ISBN | Release Date | Superseded By |
| Imperial Fists (Space Marines) | 978-1-78826-672-7 | October 2019 | 10th Edition Index: Space Marines |
| Iron Hands (Space Marines) | 978-1-78826-658-1 | September 2019 | 10th Edition Index: Space Marines |
| Ravenguard (Space Marines) | 978-1-78826-651-2 | September 2019 | 10th Edition Index: Space Marines |
| Salamanders (Space Marines) | 978-1-78826-679-6 | October 2019 | 10th Edition Index: Space Marines |
| Ultramarines (Space Marines) | 978-1-78826-637-6 | August 2019 | 10th Edition Index: Space Marines |
| White Scars (Space Marines) | 978-1-78826-644-4 | August 2019 | 10th Edition Index: Space Marines |
| Index | Factions | ISBN | Release Date | Superseded By |
| Chaos | Heretic Astartes, Chaos Daemons & Questor Traitoris | 978-1-78581-865-3 | June 2017 | 8th Edition Chaos codexes |
| Imperium 1 | Space Marines, Blood Angels, Dark Angels, Space Wolves,Grey Knights, Deathwatch & Legion of the Damned | 978-1-78581-906-3 | June 2017 | 8th Edition Imperium codexes |
| Imperium 2 | Astra Militarum, Adeptus Mechanicus, Imperial Knights,Imperial Agents & Talons of the Emperor | 978-1-78581-913-1 | June 2017 | 8th Edition Imperium codexes |
| Xenos 1 | Craftworlds, Drukhari, Ynnari, Harlequins & Necrons | 978-1-78581-899-8 | June 2017 | 8th Edition Xenos codexes |
| Xenos 2 | Orks, Tau Empire, Tyranids & Genestealer Cults | 978-1-78581-892-9 | June 2017 | 8th Edition Xenos codexes |
* ↑ 8th Edition Codex: Chaos Space Marines, Codex: Death Guard, Codex: Thousand Sons, Codex: Chaos Daemons, Index: Renegade Knights
* ↑ 8th Edition Codex: Space Marines, Codex: Blood Angels, Codex: Dark Angels, Codex: Space Wolves, Codex: Grey Knights, & Codex: Deathwatch
* ↑ 8th Edition Codex: Astra Militarum, Codex: Adeptus Mechanicus, Codex: Imperial Knights, Codex: Adepta Sororitas, Codex: Adeptus Custodes & Index Imperialis Articles
* ↑ 8th Edition Codex: Craftworlds, Codex: Drukhari, Index: Xenos - Ynnari, Codex: Harlequins, & Codex: Necrons
* ↑ 8th Edition Codex: Orks, Codex: Tau Empire, Codex: Tyranids, & Codex: Genestealer Cults

#### 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.
| Codex | ISBN | Release Date | Superseded By |
| Blood Angels | 978-1-78253-612-3 | December 2014 | 8th Edition Index: Imperium 1 |
| Cult Mechanicus | 978-1-78253-742-7 | May 2015 | 8th Edition Index: Imperium 2 |
| Craftworlds | 978-1-78253-730-4 | April 2015 | 8th Edition Index: Xenos 1 |
| Dark Angels | 978-1-78253-752-6 | June 2015 | 8th Edition Index: Imperium 1 |
| Dark Eldar | 978-1-78253-483-9 | October 2014 | 8th Edition Index: Xenos 1 |
| Deathwatch | 978-1-78581-156-2 | August 2016 | 8th Edition Index: Imperium 1 |
| Genestealer Cults | 978-1-78581-271-2 | October 2016 | 8th Edition Index: Xenos 2 |
| Grey Knights | 978-1-78253-370-2 | August 2014 | 8th Edition Index: Imperium 1 |
| Harlequins | 978-1-78253-683-3 | February 2015 | 8th Edition Index: Xenos 1 |
| Imperial Agents | 978-1-78581-802-8 | December 2016 | 8th Edition Index: Imperium 1 & 2 |
| Imperial Knights | 978-1-78253-734-2 | May 2015 | 8th Edition Index: Imperium 2 |
| Khorne Daemonkin | 978-1-78253-726-7 | March 2015 | 8th Edition Index: Chaos |
| Necrons | 978-1-78253-607-9 | January 2015 | 8th Edition Index: Xenos 1 |
| Orks | 978-1-78253-329-0 | June 2014 | 8th Edition Index: Xenos 2 |
| Skitarii | 978-1-78253-738-0 | April 2015 | 8th Edition Index: Imperium 2 |
| Space Marines | 978-1-78253-747-2 | June 2015 | 8th Edition Index: Imperium 1 |
| Space Wolves | 978-1-78253-381-8 | August 2014 | 8th Edition Index: Imperium 1 |
| Tau Empire | 978-1-78581-009-1 | October 2015 | 8th Edition Index: Xenos 2 |
| Codex Supplement | ISBN | Release Date | Superseded By |
| Angels of Death (Space Marines) | 978-1-78581-695-6 | April 2016 | 8th Edition |
| Black Legion (Chaos Space Marines) | 978-1-78581-705-2 | April 2016 | 8th Edition |
| Cadia (Astra Militarum) | Digital Only | January 2016 | 8th Edition |
| Champions of Fenris (Space Wolves) | 978-1-78253-399-3 | August 2014 | 8th Edition |
| Clan Raukaan (Space Marines) | Digital Only | June 2015 | 8th Edition |
| Crimson Slaughter (Chaos Space Marines) | 978-1-78581-696-3 | April 2016 | 8th Edition |
| Farsight Enclaves (Tau Empire) | 978-1-78581-689-5 | February 2016 | 8th Edition |
| Flesh Tearers (Blood Angels) | Digital Only | January 2016 | 8th Edition |
| Haemonculus Covens (Dark Eldar) | 978-1-78253-493-8 | October 2014 | 8th Edition |
| Raven Guard (Space Marines) | Digital Only | January 2016 | 8th Edition |
| Sentinels of Terra (Space Marines) | Digital Only | June 2015 | 8th Edition |
| Traitor Legions (Chaos Space Marines) | 978-1-78581-794-6 | December 2016 | 8th Edition |
| Waaagh! Ghazghkull (Orks) | 978-1-78253-460-0 | July 2014 | 7th Edition Reprint |
| Waaagh! Ghazghkull (Orks) Reprint | 978-1-78581-690-1 | February 2016 | 8th Edition |
| White Scars (Space Marines) | Digital Only | January 2016 | 8th Edition |

#### 6th Edition

6th Edition was released June 2012. Codex Supplements have their parent faction noted in brackets.
| Codex | ISBN | Release Date | Superseded By |
| Adepta Sororitas | 978-1-78253-360-3 | October 2013 | 8th Edition Index: Imperium 2 |
| Astra Militarum | 978-1-78253-259-0 | April 2014 | 8th Edition Index: Imperium 2 |
| Chaos Daemons | 978-1-908872-88-3 | March 2013 | 8th Edition Index: Chaos |
| Chaos Space Marines | 978-1-908872-02-9 | October 2012 | 8th Edition Index: Chaos |
| Dark Angels | 978-1-908872-26-5 | January 2013 | 7th Edition Codex: Dark Angels |
| Eldar | 978-1-78253-019-0 | June 2013 | 7th Edition Codex: Craftworlds |
| Imperial Knights | 978-1-78253-245-3 | March 2014 | 7th Edition Codex: Imperial Knights |
| Inquisition | 978-1-78253-404-4 | November 2013 | 8th Edition Index: Imperium 2 |
| Legion of the Damned | 978-1-78253-526-3 | February 2014 | 8th Edition Index: Imperium 1 |
| Militarum Tempestus | 978-1-78253-304-7 | Mars 2014 | 8th Edition Index: Imperium 2 |
| Space Marines | 978-1-78253-076-3 | September 2013 | 7th Edition Codex: Space Marines |
| Tau Empire | 978-1-78253-003-9 | April 2013 | 7th Edition Codex: Tau Empire |
| Tyranids | 978-1-78253-195-1 | January 2014 | 8th Edition Index: Xenos 2 |
| Codex Supplement | ISBN | Release Date | Superseded By |
| Black Legion (Chaos Space Marines) | 978-1-78253-301-6 | August 2013 | 7th Edition Revised Version |
| Clan Raukaan (Space Marines) | 978-1-78253-406-8 | November 2013 | 7th Edition Revised Version |
| Crimson Slaughter (Chaos Space Marines) | 978-1-78253-310-8 | March 2014 | 7th Edition Revised Version |
| Farsight Enclaves (Tau Empire) | 978-1-78253-222-4 | July 2013 | 7th Edition Revised Version |
| Iyanden (Eldar) | 978-1-78253-107-4 | June 2013 | 7th Edition Codex: Craftworlds |
| Sentinels of Terra (Space Marines) | 978-1-78253-365-8 | November 2013 | 7th Edition Revised Version |

#### 5th Edition

5th Edition was released in 2008.
| Codex | ISBN | Release Date | Superseded By |
| Blood Angels | 978-1-84154-960-6 | April 2010 | 7th Edition Codex: Blood Angels |
| Dark Eldar | 978-1-84154-978-1 | November 2010 | 7th Edition Codex: Dark Eldar |
| Grey Knights | 978-1-84154-991-0 | April 2011 | 7th Edition Codex: Grey Knights |
| Imperial Guard | 978-1-84154-923-1 | May 2009 | 6th Edition Codex: Astra Militarum |
| Necrons | 978-1-907964-18-3 | November 2011 | 7th Edition Codex: Necrons |
| Sisters of Battle | N/A - White Dwarf | August/September 2011 | 6th Edition Codex: Adepta Sororitas (iBook) |
| Space Marines | 978-1-84154-894-4 | October 2008 | 6th Edition Codex: Space Marines |
| Space Wolves | 978-1-84154-939-2 | October 2009 | 7th Edition Codex: Space Wolves |
| Tyranids | 978-1-84154-951-4 | January 2010 | 6th Edition Codex: Tyranids |

#### 4th Edition

4th Edition was released in 2004. Codex Supplements have their parent faction noted in brackets.
| Codex | ISBN | Release Date | Superseded By |
| Black Templars | 1-84154-685-2 | November 2005 | 6th Edition Codex: Space Marines |
| Blood Angels | N/A - White Dwarf | June/July 2007 | 5th Edition Codex: Blood Angels |
| Chaos Daemons | 978-1-84154-879-1 | May 2008 | 6th Edition Codex: Chaos Daemons |
| Chaos Space Marines | 978-1-84154-842-5 | September 2007 | 6th Edition Codex: Chaos Space Marines |
| Dark Angels | 1-84154-807-3 | March 2007 | 6th Edition Codex: Dark Angels |
| Eldar | 1-84154-791-3 | November 2006 | 6th Edition Codex: Eldar |
| Orks | 978-1-84154-852-4 | January 2008 | 7th Edition Codex: Orks |
| Space Marines | 1-84154-526-0 | November 2004 | 5th Edition Codex: Space Marines |
| Tau Empire | 1-84154-712-3 | March 2006 | 6th Edition Codex: Tau Empire |
| Tyranids | 1-84154-650-X | June 2005 | 5th Edition Codex: Tyranids |
| Codex Supplement | ISBN | Release Date | Superseded By |
| Catachans (Imperial Guard) | 1-84154-016-1 | 2005 | 5th Edition Codex: Imperial Guard |
* ↑ Presented in two parts in White Dwarf issues #330 and #331, and subsequently available online from the Games Workshop website, with long-term plan to publish this list in a new book.

#### 3rd Edition

3rd Edition was released in 1998. Codex Supplements have their parent faction noted in brackets.
| Codex | ISBN | Release Date | Superseded By |
| Chaos Space Marines | 1-869893-49-2 | February 1999 | 3rd Edition Codex (2nd Edition) |
| Chaos Space Marines (2nd Edition) | 1-84154-322-5 | October 2002 | 4th Edition Codex |
| Daemonhunters | 1-84154-361-6 | March 2003 | 5th Edition Codex: Grey Knights |
| Dark Eldar | 1-869893-41-7 | November 1998 | 3rd Edition Codex (2nd Edition) |
| Dark Eldar (2nd Edition) | 1-84154-307-1 | November 2003 | 5th Edition Codex |
| Eldar | 1-869893-39-5 | August 1999 | 4th Edition Codex |
| Imperial Guard | 1-869893-52-2 | November 1999 | 3rd Edition Codex (2nd Edition) |
| Imperial Guard (2nd Edition) | 1-84154-410-8 | September 2003 | 5th Edition Codex |
| Necrons | 1-84154-190-7 | July 2002 | 5th Edition Codex |
| Orks | 1-869893-38-7 | July 1999 | 4th Edition Codex |
| Space Marines | 1-869893-28-X | October 1998 | 4th Edition Codex |
| Tyranids | 1-84154-013-7 | February 2001 | 4th Edition Codex |
| Tau | 1-84154-098-6 | October 2001 | 4th Edition Codex: Tau Empire |
| Witch Hunters | 1-84154-485-X | April 2004 | 5th Edition Codex: Sisters of Battle (White Dwarf) |
| Codex Supplement | ISBN | Release Date | Superseded By |
| Assassins | 1-84154-019-6 | July 1999 | Codex: Daemonhunters / Witch Hunters |
| Blood Angels (Space Marines) | 1-869893-45-X | December 1998 | 4th Edition Codex (White Dwarf) |
| Catachans (Imperial Guard) | 1-84154-016-1 | February 2000 | 4th Edition Codex (free download) |
| Craftworld Eldar (Eldar) | 1-84154-029-3 | June 2000 | 4th Edition Codex: Eldar |
| Dark Angels (Space Marines) | 1-869893-67-0 | May 1999 | 3rd Edition Codex (2nd Edition) |
| Dark Angels (2nd Edition) (Space Marines) | 1-84154-302-0 | Nov 2002 | 4th Edition Codex |
| Space Wolves (Space Marines) | 1-84154-010-2 | April 2000 | 5th Edition Codex |

#### 2nd Edition

All codices were rendered obsolete by 3rd edition Warhammer 40,000. 2nd Edition was released in 1993.
| Codex | ISBN | Release Date |
| Angels of Death | 1-872372-96-1 | January 1996 |
| Chaos | 1-872372-47-3 | July 1996 |
| Eldar | 1-872372-74-0 | April 1994 |
| Imperial Guard | 1-872372-92-9 | November 1995 |
| Orks | 1-872372-76-7 | July 1994 |
| Sisters of Battle | 1-872372-14-7 | August 1997 |
| Tyranids | 1-872372-90-2 | August 1995 |
| Ultramarines | 1-872372-87-2 | April 1995 |
| Space Wolves | 1-872372-71-6 | January 1994 |
| Codex Supplement | ISBN | Release Date |
| Assassins | 1-872372-05-8 | December 1997 |
* ↑ Covers rules for both Dark Angels and Blood Angels.
* ↑ Covers rules for both Tyranids and Genestealer Cults.
* ↑ Also covers rules for other "standard" Space Marine armies.

### Expansions/Supplements
#### 9th Edition

All 9th Edition expansions were superseded by 10th Edition, with the exseption of the Arks of Omen "Boarding Actions" rules.
| Book | Notes | ISBN | Release Date |
| War Zone Charadon Act 1: The Book of Rust | Campaign & Death Guard, Adeptus Mechanicus, Imperial Knights, Chaos Knights, Drukhari Rules | 978-1-83906-315-2 | January 2021 |
| War Zone Charadon Act 2: The Book of Fire | Campaign & Adeptus Mechanicus, Adeptus Sororitas, Be'lakor, Chaos Space Marines Rules | 978-1-83906-331-2 | July 2021 |
| War Zone Octarius Book 1: Rising Tide | Campaign & Astra Militarum, Deathwatch, Fortification, Inquisition, Tyranids Rules | Un­known | October 2021 |
| War Zone Octarius Book 2: Critical Mass | Campaign & Astra Cartographica, Orks Rules | Un­known | November 2021 |

#### 8th Edition

| Book | Notes | ISBN | Release Date | Superseded By |
| Warhammer 40,000 | Core rulebook | 978-1-78581-849-3 | June 2017 | 9th Edition |
| Chapter Approved: 2017 Edition | Annual rules update | 978-1-78826-043-5 | December 2017 | 9th Edition |
| Chapter Approved: 2018 Edition | Annual rules update | 978-1-78826-373-3 | December 2018 | 9th Edition |
| Chapter Approved: 2019 Edition | Annual rules update | 978-1-78826-757-1 | December 2019 | 9th Edition |
| Imperium Nihilus: Vigilus Defiant | Campaign & Ultramarines Rules | 978-1-78826-381-8 | December 2018 |
| Imperium Nihilus: Vigilus Ablaze | Campaign & Black Legion Rules | 978-1-78826-461-7 | April 2019 |
| Psychic Awakening: Phoenix Rising | Craftworlds, Drukhari & Index: Ynnari | 978-1-78826-713-7 | October 2019 |
| Psychic Awakening: Faith & Fury | Chaos Space Marines & Space Marines | 978-1-78826-725-0 | November 2019 |
| Psychic Awakening: Blood of Baal | Blood Angels & Tyranids | 978-1-78826-743-4 | December 2019 |
| Psychic Awakening: Ritual of the Damned | Dark Angels, Grey Knights & Thousand Sons | 978-1-78826-764-9 | January 2020 |
| Psychic Awakening: The Greater Good | Tau, Astra Militarum & Genestealer Cults | 978-1-78826-771-7 | February 2020 |
| Psychic Awakening: Saga of the Beast | Space Wolves & Orks | 978-1-78826-734-2 | March 2020 |
| Psychic Awakening: Engine War | Adeptus Mechanicus, Imperial Knights, Chaos Knights & Chaos Daemons | 978-1-78826-778-6 | June 2020 |
| Psychic Awakening: War of the Spider | Adeptus Custodes, Sisters of Silence, Assassins, Death Guard & Agents of Bile | 978-1-78826-806-6 | June 2020 |
| Psychic Awakening: Pariah | Adepta Sororitas, Necrons & Index: Inquisition | 978-1-78826-813-4 | July 2020 |

#### 7th Edition

All 7th Edition expansions were superseded by 8th Edition.
| Book | Notes | ISBN | Release Date |
| Black Crusade: Angel's Blade | Blood Angels Update | 978-1-78581-718-2 | September 2016 |
| Black Crusade: Traitor's Hate | Chaos Space Marines Update | 978-1-78581-263-7 | September 2016 |
| Blood Oath | Warhammer World Campaign | 978-1-78572-118-2 | May 2015 |
| Death from the Skies | Expanded Rules for Flyers | 978-1-78581-096-1 | May 2016 |
| Death Masque | Deathwatch vs Harlequins | N/A - Boxset | August 2016 |
| Gathering Storm: Fall of Cadia | Narrative Campaign of Fall of Cadia | 978-1-78581-763-2 | January 2017 |
| Gathering Storm: Fracture of Biel-tan | Narrative Campaign | 978-1-78581-773-1 | February 2017 |
| Gathering Storm: Rise of the Primarch | Narrative Campaign | 978-1-78581-785-4 | March 2017 |
| Kill Team | Small Skirmish Games | N/A - Boxset | September 2016 |
| Path to Glory | Campaign | Digital Edition | December 2015 |
| Planetary Onslaught | Planetstrike, Cities of Death Compendium | 978-1-78581-752-6 | November 2016 |
| Planetstrike | Sanctus Reach Planetstrike Compendium | Digital Edition | September 2014 |
| Sanctus Reach: Hour of the Wolf | Planetrike Missions and Space Wolves | 978-1-78253-421-1 | August 2014 |
| Sanctus Reach: The Red Waaagh! | Planetstrike Rules and Orks | 978-1-78253-337-5 | July 2014 |
| Sanctus Reach: Stormclaw | Space Wolves vs Orks | N/A - Boxset | July 2014 |
| Shield of Baal: Deathstorm | Blood Angels vs Tyranids | N/A - Boxset | December 2014 |
| Shield of Baal: Exterminatus | Blood Angels and Necrons Detachments | 978-1-78253-625-3 | December 2014 |
| Shield of Baal: Leviathan | Cities of Death and Tyranids Update | 978-1-78253-619-2 | November 2014 |
| War Zone Fenris: Curse of the Wulfen | Space Wolves and Daemons Updates | 978-1-78581-067-1 | February 2016 |
| War Zone Fenris: Wrath of Magnus | Thousand Sons and Daemons Update | 978-1-78581-760-1 | December 2016 |
| War Zone Damocles: Burning Dawn | Tau Empire | N/A - Boxset | November 2015 |
| War Zone Damocles: Kauyon | Tau Empire and Space Marines Updates | 978-1-78581-013-8 | November 2015 |
| War Zone Damocles: Mont'ka | Tau, Astra Militarum and Assassins Updates | 978-1-78581-018-3 | November 2015 |
| War Zone Damocles: Operation Shadowtalon | Raven Guard | N/A - Boxset | November 2015 |

#### 6th Edition

| Book | Notes | ISBN | Release Date | Superseded By |
| Altar of War | Additional Battle Missions | Various Digital Releases | 2012–2014 | Discontinued |
| Apocalypse | Large-scale battles | 978-1-78253-047-3 | July 2013 | 8th Edition |
| Campaign: Crusade of Fire | Campaign and Additional Rules | 978-1-908872-21-0 | November 2012 | Discontinued |
| Compendium: Altar of War | Additional Battle Missions | 978-1-78253-599-7 | April 2014 | 8th Edition |
| Compendium: Death from the Skies | Flier Rules Compendium | 978-1-78253-065-7 | February 2013 | 7th Edition SoB: Leviathan |
| Death Worlds | Digital Campaign | Digital Edition | June 2013 | 8th Edition |
| Escalation | Lords of War | 978-1-78253-255-2 | December 2013 | 8th Edition |
| Kill Team | Small Skirmish Games | Digital Edition | December 2013 | 7th Edition Kill Team |
| Stronghold Assault | Siege Warfare | 978-1-78253-175-3 | December 2013 | Planetary Onslaught |
| Warzone: Damocles | Apocalypse Warzone | 978-1-78253-235-4 | March 2014 | 8th Edition |
| Warzone: Damnos | Apocalypse Warzone | 978-1-78253-089-3 | September 2013 | 8th Edition |
| Warzone: Pandorax | Apocalypse Warzone | 978-1-78253-101-2 | November 2013 | 8th Edition |
| Warzone: Valedor | Apocalypse Warzone | 978-1-78253-205-7 | May 2014 | 8th Edition |

#### 5th Edition

| Book | Notes | ISBN | Release Date | Superseded By |
| Apocalypse Reload | Supplement to Apocalypse | 978-1-84154-893-7 | August 2008 | 6th Edition Apocalypse Book |
| Battle Missions | Additional Battle Scenarios | 978-1-84154-911-8 | March 2010 | Eternal War, Maelstrom of War, Altar of War & Echoes of War |
| Death Worlds | Additional Battle Scenarios | N/A - White Dwarf | April 2012 | Death Worlds - Digital 6th Edition |
| Planetary Empires | Map-based Campaigns | N/A - Boxset | August 2009 | Discontinued Rules (Tiles Available) |
| Planetstrike | Planetary Invasions | 978-1-84154-931-6 | July 2009 | 7th Edition Sanctus Reach Campaign/Planetstrike |
| Spearhead | Mechanized Armies | N/A - White Dwarf | June 2010 | 7th Edition & Formations |

#### 4th Edition

| Book | Notes | ISBN | Release Date | Superseded By |
| Apocalypse | Large-scale battles | 1-84154-838-3 | October 2007 | 6th Edition Apocalypse Book |
| Cities of Death | Urban Warfare | 1-84154-749-2 | June 2006 | 7th Edition Shield of Baal: Leviathan |

#### 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.
| Codex | ISBN | Release Date | Superseded By |
| Cityfight | 1-84154-093-5 | September 2001 | 4th 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.
| Codex | Obsolete Army Lists | ISBN | Release Date | Superseded By |
| Armageddon | Black Templars, Salamanders, Speed Freeks, Armageddon Imperial Guard | 1-84154-045-5 | August 2000 | 4th Edition Codex: Space Marines; Black Templars; Orks and 5th Edition Codex: Imperial Guard |
| Eye of Terror | Lost and the Damned, Ulthwé Strike Force, Cadian Shock Troops, 13th Company | 1-84154-398-5 | June 2003 | 4th Edition Codex: Eldar; Chaos Space Marines and 5th Edition Codex: Imperial Guard; Space Wolves |

### Imperial Armour

| Imperial Armour | Notes | ISBN | Release Date | Superseded by |
| Imperial Armour | Imperial Guard & Imperial Navy | 1-84154-127-3 | 2000 | Imperial Armour Restarted Line |
| Imperial Armour II | Orks, Eldar, and Dark Eldar | 1-84154-219-9 | 2001 | Imperial Armour Restarted Line |
| Imperial Armour Aeronautica | Update and compilation of fliers and anti-aircraft units for the 6th Edition release of Warhammer 40k | 978-1-907964-95-4 | July 2012 | 8th Edition |
| Imperial Armour Apocalypse | Companion volume to Warhammer 40,000 Apocalypse, containing new battle formations as well as new Apocalypse compatible game statistics for several Forge World models | 978-1-84154-892-0 | 2007 | Imperial Armour Apocalypse (2nd Edition) |
| Imperial Armour Apocalypse (2nd Edition) | Companion volume to Warhammer 40,000 Apocalypse, containing new battle formations as well as new Apocalypse compatible game statistics for several Forge World models | 978-1-907964-67-1 | 2011 | Imperial Armour Apocalypse (2013 Edition) |
| Imperial Armour Apocalypse (2013 Edition) | Companion volume to Warhammer 40,000 Apocalypse, containing new battle formations as well as new Apocalypse compatible game statistics for several Forge World models | 978-1-78253-106-7 | August 2013 | 8th Edition |
| Imperial Armour Apocalypse II | Companion volume to Warhammer 40,000 Apocalypse, containing new battle formations as well as new Apocalypse compatible game statistics for several Forge World models | 978-1-84154-976-7 | 2009 | Imperial Armour Apocalypse (2013 Edition) |
| Imperial Armour Update | Rules for models for all races, stopgap measure until the release of the "Imperial Armour Volume x" books. | 1-84154-355-1 | 2002 | Imperial Armour Restarted Line |
| Imperial Armour Update 2005 | Rules for Forge World models not covered by the other volumes | 1-84154-722-0 | 2005 | Imperial Armour Restarted Line |
| Imperial Armour Update 2006 | Rules for Forge World models not covered by the other volumes | 1-84154-818-9 | 2006 | Imperial Armour Restarted Line |
| Imperial Armour Volume 1: Imperial Guard & Imperial Navy | Imperial Guard & Imperial Navy | 1-84154-421-3 | 2003 | Imperial Armour 1 (2nd Edition) |
| Imperial Armour Volume 1: Imperial Guard (2nd Edition) | Imperial Guard | 978-1-907964-08-4 | December 2012 | 8th Edition |
| Imperial Armour Volume 2: Space Marines & Forces of the Inquisition | Space Marines & Forces of the Inquisition | 1-84154-509-0 | 2004 | Imperial Armour 2 (2nd Edition) |
| Imperial Armour Volume 2: War Machines of the Adeptus Astartes (2nd Edition) | Adepta Sororitas, Space Marines & Forces of the Inquisition | 978-1-78253-302-3 | December 2013 | 8th Edition |
| Imperial Armour Volume 3: The Taros Campaign | Tau, Imperial Guard & Space Marines | 1-84154-708-5 | 2005 | Imperial Armour 3 (2nd Edition) |
| Imperial Armour Volume 3: The Taros Campaign (2nd Edition) | Tau & Elysian Drop Troops | 978-1-908872-79-1 | June 2013 | 8th Edition |
| Imperial Armour Volume 4: The Anphelion Project | Tyranids, Imperial Guard & Space Marines | 1-84154-784-0 | 2006 | Imperial Armour 4 (2nd Edition) |
| Imperial Armour Volume 4: The Anphelion Project (2nd Edition) | Tyranids, Imperial Guard & Space Marines | 978-1-78253-528-7 | July 2014 | 8th Edition |
| Imperial Armour Volume 5: The Siege of Vraks (Part 1) | Death Korps of Krieg, Dark Angels & Chaos Renegades | 978-1-84154-851-7 | May 2007 | Imperial Armour The Siege of Vraks |
| Imperial Armour Volume 6: The Siege of Vraks (Part 2) | Death Korps of Krieg & Chaos Renegades | 978-1-84154-910-1 | August 2008 | Imperial Armour The Siege of Vraks |
| Imperial Armour Volume 7: The Siege of Vraks (Part 3) | Forces of the Inquisition & Chaos Renegades | 978-1-84154-955-2 | August 2009 | Imperial Armour The Siege of Vraks |
| Imperial Armour Volume 8: Raid on Kastorel-Novem | Elysian Drop Troop, Raven Guard & Orks | 978-1-84154-977-4 | May 2010 | 8th Edition |
| Imperial Armour Volume 9: The Badab War (Part 1) | The Tyrant's Legion | 978-1-84154-995-8 | 2010 | 8th Edition |
| Imperial Armour Volume 10: The Badab War (Part 2) | Siege Vanguard Assault | 978-1-907964-01-5 | January 2011 | 8th Edition |
| Imperial Armour Volume 11: The Doom of Mymeara | Imperial Guard, Space Wolves & Eldar | 978-1-907964-16-9 | December 2011 | Imperial Armour The Doom of Mymeara |
| Imperial Armour Volume 12: The Fall of Orpheus | Necrons, Minotaurs & Death Korps of Krieg | 978-1-908872-95-1 | May 2013 | 8th Edition |
| Imperial Armour Volume 13: War Machines of the Lost and the Damned | Chaos Space Marines, Chaos Renegades & Chaos Daemons | 978-1-78253-606-2 | September 2014 | 8th Edition |
| Imperial Armour: The Doom of Mymeara | Imperial Guard, Space Wolves & Eldar | 978-1-78253-970-4 | 2015 | 8th Edition |
| Imperial Armour: The Siege of Vraks | Death Korps of Krieg, Red Scorpions, Grey Knights, World Eaters & Chaos Renegades | 978-1-78253-204-0 | 2015 | 8th Edition |
| Index: Forces of Chaos | All Chaos (except Chaos Astra Militarum) | 978-1-78826-114-2 | June 2017 | Imperial Armour Compendium |
| Index: Forces of the Adeptus Astartes | All Adeptus Astartes | 978-1-78826-115-9 | June 2017 | Imperial Armour Compendium |
| Index: Forces of the Astra Militarum | All Astra Militarum (both Imperial and Chaos) and Imperium | 978-1-78826-116-6 | June 2017 | Imperial Armour Compendium |
| Index: Xenos | All Xenos | 978-1-78826-117-3 | June 2017 | Imperial Armour Compendium |
| Imperial Armour Compendium | Adeptus Custodes, Adeptus Mechanicus, Astra Militarum, Chaos Daemons, Chaos Knights, Chaos Space Marines, Craftworlds, Death Guard, Drukhari, Grey Knights, Imperial Knights, The Inquisition, Necrons, Orks, Space Marines, T’au Empire, Tyranids | 978-1-83906-104-2 | November 2020 |