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Warhammer 40k Codex release dates

All the Warhammer 40k 10th edition codex release dates revealed so far, and a rundown of the Codexes that have released so far for Warhammer 40k.

Warhammer 40k codex release dates guide - Games Workshop image showing the new 10th edition Dark Angels codex, on a blue hex pattern background

Games Workshop has revealed the initial road map for Warhammer 40k codex army books for 10th edition Warhammer 40k, but there are still many armies waiting for new rules. This guide tracks all the codex release dates revealed so far, and has useful info about how to use the digital codes that come in the back of every book

If you’re new to Games Workshop’s premier sci-fi miniature wargame, our expert guides to the Warhammer 40k factions will help you get oriented in this huge sci-fi world – there’s more than just Space Marines. We also have a rundown of the best Warhammer 40k starter set for your needs, too. You’ll find lots more at our Warhammer 40k homepage.

For now, though, let’s run through the latest official codex rulebooks – some already released, some scheduled, and others as yet mired in mystery. You can click the links below to find the info you need:

Warhammer 40k Codex Tyranids, a large format book with a picture of a multi-armed alien warlord on the cover

Confirmed 10th edition codex release dates

Of the at least 22 10th edition codexes we expect to arrive over the next two and a half years, nine have been released and two more are imminent. Here’s a table showing all the codexes announced so far:

Codex Release date
Tyranids September 9 2023
Space Marines October 7 2023
Necrons December 9 2023
Adeptus Mechanicus December 9 2023
Dark Angels March 9 2024
Orks April 20 2024
Adeptus Custodes April 20 2024
T’au Empire April 27 2024
Chaos Space Marines May 25 2024
Sisters of Battle (Adepta Sororitas) June 22 2024
Genestealer Cults June 22 2024

If you’re wondering when a particular Codex released during 9th edition 40k, check out our guide to 9th edition Codexes

Warhammer 40k codex release dates guide - Games workshop image showing the special edition cover art of the new Tau Empire 10th edition codex book

Which 10th edition codexes are coming next?

The Sisters of Battle and Genestealer Cults codexes will release on June 22.

With the release of Age of Sigmar fourth edition this summer, we expect a lull in 40k codex releases. Wargamer will be keeping our auspexes trained on GW for any hint of a renewed 10th edition codex roadmap.

As well as the armies that we expect to receive codex books, it’s almost certain that the Emperor’s Children subfaction of Chaos Space Marines will receive their own standalone codex and model range this edition.

Games Workshop has removed rules for the Emperor’s Children from the most recent Chaos Space Marines codex, and given them a stand-by Index instead. GW has converted a Chaos Space Marine subfaction into a standalone faction in each of the previous editions of Warhammer 40k, and now it’s the turn of the Emperor’s Children.

Codex Release date
Astra Militarum Unknown
Grey Knights Unknown
Imperial Knights Unknown
Death Guard Unknown
World Eaters Unknown
Thousand Sons Unknown
Chaos Daemons Unknown
Chaos Knights Unknown
Aeldari Unknown
Drukhari Unknown
Leagues of Votann Unknown

Warhammer 40k Codex Code example

How do I redeem Warhammer 40k Codex codes?

You’ll find a unique Warhammer 40k Codex code in the back of each printed Codex. You can register this code on your MyWarhammer account, which will in turn unlock all the datasheets and Detachments from the Codex in the Warhammer 40k app.

You can then use that data in the Battle Forge army builder. You will be limited to just one army list at a time in the app, unless you also have a Warhammer+ subscription.

Warhammer 40k codex release dates guide - Wargamer image showing a row of Warhammer 40k codex books on a shelf

What are Warhammer 40k codex books?

Codexes are the traditional home for the rules for each Warhammer 40k faction, though Warhammer 40k 10th edition launched with a full set of free ‘Index’ rules for each army.

As Codexes are released, they supercede the Index, updating rules and points, and adding new Warhammer 40k detachments that give you alternative ways to build your army that will reward you with new abilities, enhancements, and 40k Stratagems.