Here is the new 2025 Warhammer 40k Codex roadmap with faction updates, release dates schedule, and gameplay shifts for 10th Edition!
Updated on June 23rd, 2025, by Rob Baer with all the new preview reveals for Space Wolves, Grey Knights, Imperial Knights, Chaos Knights, and now Black Templars.
Games Workshop revealed the official 2025 Warhammer 40k codex release schedule, outlining new updates and models across the 10th edition codex roadmap for all major factions.
Here is what is on the horizon for the nearly 30 factions in 2025, which is shaping up to be another blockbuster year for the Warhammer Community.
Overall 10th Edition Codex Roadmap Update
Let’s break down the overall Warhammer 40k 10th Edition release schedule so far, but first a quick look at what is on the horizon now:
Quick Reference: 2025 40k Codex Release Schedule
- June: Chaos Knights
- Q2/Q3: Imperial Knights, Grey Knights, Black Templars
- More factions: Salamanders, Leagues of Votann, Imperial Fists (“on the horizon”)
Looking back on last summer, Codex Imperial Agents was released in August of 2024. No one suspected that Games Workshop would reveal new 40k Inquisition rules, character models, and three new battleforces all at once.
They were followed by the Blood Angels Army box and a separate codex release. Then, Deathwatch even got their rules updated via a new index in December 2024 for Grotmas!
First out of the gate in 2025 was Astra Miltarium, followed by Aeldari, Chaos Daemons, with Emperor’s Children, and now the remainder of the Chaos legions and Chaos Knights have also dropped.
Next up, we’ve seen previews for the new Space Wolves (released as an army box so far), Black Templars, and Grey Knights. Then, best of all, Imperial Knights, Leagues of Votann, and Salamanders are also on the horizon.
2025 Warhammer 40k Codex Release Schedule:
Games Workshop has now confirmed quite a few Codex releases for their new 2025 Warhammer 40k timeline. Additionally, there are hints of even more exciting previews to come at Gen Con 2025.
- Thousand Sons: The Thousand Sons are conjuring up new options for Warhammer 40k players. Their Codex received an update with an infusion of arcane powers and refined strategies.
- World Eaters: Khorne’s chosen warriors are bringing their unmatched ferocity to the forefront. The World Eaters updates further emphasized their close-combat dominance. They received numerous changes to unit rules and synergy improvements for Angron and the Eightbound.
- Death Guard: The inexorable march of the Death Guard continues with new additions to their roster. Updates to their Codex made Mortarion’s plague-ridden legion even more resilient and deadly.
Happening Now
- Space Wolves: Rumors had been swirling about the Sons of Fenris and Leman Russ himself making a triumphant return with a new Codex or unit expansions. From updates to Wulfen, fresh wargear options, and tweaks to their Space Wolf-specific abilities, this is a howl-worthy addition to the 10th edition.
- Chaos Knights (June 21st, 2025): The new codex is packed with lore, detachment rules, and datasheets. And yes, it’s nice to have your army’s details in one place again—but how long will that last? Since 10th Edition dropped, Knights have had more rule churn than most armies.
Coming Soon
Black Templars: The Black Templars are part of the 2025 Warhammer codex release schedule, with potential updates to units and the vow system according to the 10th edition codex roadmap.
Rumors say Crusader squads may see enhanced flexibility, and their vow system could receive tweaks to make their righteous fury even more impactful.
Grey Knights: The daemon-hunting elites of the Imperium will soon receive some long-awaited attention. Grey Knights whispers hinted at updates that could bolster their psychic prowess and add depth to their unique units like Nemesis Dreadknights and Purifiers.
This would cement their position as a powerful counterbalance to the forces of Chaos in the 10th edition.
Imperial Knights: Get ready to command those towering war machines with new wargear and house-specific upgrades. The Imperial Knights Codex is set to make these colossal warriors even more formidable on the battlefield. Games Workshop even just revealed that a new Knight variant is on the way, with the Defender.
On the Horizon:
- Salamanders: The fiery warriors of Nocturne are rumored to return with new models or Codex updates. Fans are hoping for a focus on their iconic flame-based weaponry and thematic resilience. If the Salamanders do receive new releases, they could become an even stronger force for players who enjoy durable units with a penchant for devastating firepower.
- Leagues of Votann Codex: The Leagues of Votann are gearing up to make some noise in 2025. First up, the big news—there’s a brand-new Codex on the horizon. This isn’t just any old update; we’re talking a fresh, slick guidebook that promises to beef up your strategies and give the Votann a hefty edge in battles.
- Imperial Fists: The Sons of Dorn are also on the way in 2025. Word on the street (and by street, we mean the rumor-filled hallways of the internet) is that there’s a shiny new Codex on the horizon, along with at least one fresh new unit that’s sure to add some serious muscle to your tabletop battles.
“The Future”
Officially, it’s just a rumor until GW rolls out the red carpet and makes it official. However, look at what this shadowy art may foretell:
But between us, doesn’t this feel like the real deal? It’s like they dropped the first clue in a trail leading straight to a Raven Guard revamp.
Codex Release Dates by Faction
The updated 2025 Warhammer Codex Roadmap for 10th Edition is like a gift that keeps on giving. While dates can sometimes shift, Games Workshop has provided a flexible timeline to help you plan your next big army overhaul.
Here are the key release dates to mark on your calendar for all the upcoming new 10th Edition Warhammer 40k codex books. Don’t forget that you can access all these new 40k rules on both the Warhammer App and Wahapedia.
Upcoming 10th Edition Codex Roadmap
Here’s the scoop on which factions still need their 10th Edition Warhammer 40k codex books compared to the 9th edition, along with what’s coming up next from the new release roadmap.
- Drukhari (Dark Eldar) Unknown
- Space Marine Supplements: Only White Scars Unconfirmed
- Space Marine 2.0 Codex (with new units like the Drop Pod)
- A new Campaign Supplement Series (Like Arks of Omen or Psychic Awakening) leading up to the 11th Edition release is still Unconfirmed.
Impact of 9th Edition on 10th Edition Codexes and Rules
When 10th Edition launched, it effectively put the 9th Edition Codexes out to pasture. The transition to 10th Edition brought such a sweeping change that Games Workshop decided to let 9th Edition books retire peacefully rather than patch them up. So, while you may still love those beautifully illustrated 9th Edition Codexes, they’re no longer valid for 10th Edition play.
That said, they’re still worth keeping around for the lore and artwork! But on the battlefield, only the 10th Edition Indexes or Codexes will keep you in the game.
Frequently Asked Questions (FAQ)
Q: Do I need a new Codex if I have an Index?
Short answer: Yes.
Long answer: The Indexes were an awesome (and free!) starting point for players, packed with basic rules to get armies rolling when 10th Edition launched. However, as each Codex is released, it replaces the Index for that faction.
Codexes bring out each faction’s personality with new abilities, lore, and a sharper edge in the rules department. Think of the Indexes as a sampler platter and the Codex as the full banquet. If you’re serious about wielding your faction’s full tactical might, the Codex is where it’s at.
Q: How are Codexes updated in 10th Edition?
Games Workshop has a clever system in place. Each Codex release is tailored to match the streamlined mechanics of 10th Edition, focusing on simplification without losing depth. Once a Codex is out, it’s also backed by digital updates, like Balance Dataslates and FAQs, ensuring players stay current without scrambling for entirely new books every few months.
Plus, with the My Warhammer app, digital codes found in the back of the Codexes mean players get updates directly in their app—no hunting required.
Q: How Do You Redeem Warhammer 40k Codex Codes?
On the back page of every codex, there is a code that will grant you online access to the rules and the army builder function within the Warhammer 40k app. You will need to have a My Warhammer account to redeem the code. Once you have that setup, you can go into the Warhammer 40k app and type in the code that comes on the back page of the codex.
Once you have entered the code, you will then be able to access the rules within the 40k App, which will be automatically updated when GW updates the rules, and you can also use the army builder in the app to make your army lists. The code can only be used once, so don’t share it!
There are also plenty of free third-party army builders (like Battlescribe or New Recruit) and the awesome Wahapedia 10th Edition reference guide you can use as well to make lists for your Warhammer 40k games.
Final Thoughts on 40k Codex Books
Warhammer 40k’s 10th edition release schedule 2025 is showing no signs of slowing down. From the arrival of Astra Militarum, Imperial Knights, and Aeldari to the highly anticipated standalone Codex for the Emperor’s Children, the rest of the year is still packed with potential game-changers.
Each 10th edition 40k codex brings new mechanics and balance changes to the Warhammer codex roadmap, contributing to the evolving meta in 2025. Plus, with Games Workshop’s commitment to balancing and updating, we’re all set for another year of epic skirmishes, strategic battles, and, yes, a little Chaos.
Click the links below to find out more about the awesome Warhammer 40k universe and tabletop game!
- Latest Warhammer 40k Rumors
- New models 40k release schedule
- Horus Heresy New Release Roadmap
- Warhammer 40k 10th Edition Balance Dataslate Updates
- Lore & Faction Guides
- 2025 Warhammer 40k Codex Roadmap
- Warhammer 40k Combat Patrol Box Set Guide: Pricing & Values
- Best Warhammer 40k Armies
- Exclusive Warhammer Miniatures
- 40k Base Sizes Resource Guide
Latest New Release Roadmap For Warhammer
Are you excited about the 10th Edition Warhammer 40k Codex Roadmap and the 2025 40k Games Workshop release schedule?
