Warhammer 40k Codex release dates

The next Warhammer 40k codex army book to release will be the Blood Angels, by the end of 2024 – and three more have been confirmed for 2025. This guide tracks every Warhammer 40k 10th edition codex release date revealed as of September 2024, and which upcoming codexes we’re still waiting for – plus 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:

• Confirmed 10th edition codex release dates
• Which 10th edition codexes are coming next?
• How do I redeem Warhammer 40k codex codes?
• What are Warhammer 40k codexes?

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:

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

Which 10th edition codexes are coming next?

Games Workshop has announced a new codex release roadmap for 2025, confirming that Astra Militarum, Aeldari, and Imperial Knights will be the next three 10th edition codexes to release.

Codex Supplement: Blood Angels is confirmed as the last new codex of 2024, and it’s already out in the wild after being included in the Blood Angels Army Set released in early September. We don’t yet know when the standalone codex book will be released, but based on previous timings it’s likely to be within the next month or so.

In classic Games Workshop style, the roadmap below also promises “more codexes” and “big names” in 2025 – but we’ll have to keep our ears to the ground on what they are.

With the roadmap’s promise of “special chaos treats” in 2025, 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.

With the release of Age of Sigmar fourth edition this summer, were expecting a lull in 40k codex releases, but Games Workshop surprised us with the announcement of Codex Imperial Agents, which collects the rules for Inquisitors, Rogue Traders, Imperial Assassins, and the Deathwatch.

It seems to bode well for further new (or resurrected) factions to be added to the tabletop game – we’ll keep praying to the Emperor of Mankind…

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.

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.