- Warhammer 40,000: Battlesector - Dev Diary #19 - Combat Calculations - 2 October 2026
The base game mechanics of Warhammer 40,000: Battlesector are based on a tried and tested system. Units use their modified weapon accuracy to try to hit the enemy. On hit, damage is dealt based upon the modified weapon damage, with a chance that this can be a Crit (with increased damage) or a Graze (with decreased damage). All of these calculations are based upon Integers (whole numbers), which produces clarity for all involved (it’s essentially like rolling a lot of real-world D100 dice). However, as Battlesector has grown and evolved over the last 5 years, we’ve added more units and more factions, and each of those has stretched and tested our game mechanics in new ways. There are a few standout challenges that we’ve come across when developing and designing the game recently and a few have proven hard to overcome within the current game mechanics. An example of this might be somethin…
- Warhammer 40,000: Battlesector has a roadmap of upcoming additions, including a new narrative DLC - 9 August 2026
Slitherine's turn-based 40K strategy game Battlesector launched with a campaign where you could play as the none-more-goth Blood Angels against the bio-horror tyranids. That was followed by DLC adding other playable factions for multiplayer and other modes, leaving players hungry for more singleplayer story campaigns... Read more.
- Roadmap update - 7 August 2026
Greatings Warriors, It’s been a while since we updated you on how the game is proceeding, so now is the time. We are excited to unveil our updated development roadmap for Warhammer 40,000: Battlesector.Our team is dedicated to expanding the game with new ongoing quality of life updates, factions, and rich narrative content. We want to thank you for your ongoing support, feedback, and passion for Warhammer 40,000: Battlesector.Recent Releases & UpdatesThe battlefields of Battlesector have grown larger, fiercer, and more tactical than ever before:Two Major Faction DLCs Released:Black Legion DLC: The Warmaster’s wrath arrived in full force with 15 units, including Chaos Lord, Terminators, Hellbrute, and Chaos Legionaries.Ultramarines DLC: The noble sons of Macragge joined the fray during Warhammer Skulls, bringing 18 new units. From Captain in Gravis Armor and Bladeguard Veterans to Redemp…
- Warhammer 40,000: Battlesector - 1.7.7 - Patch Notes - 22 July 2026
To celebrate the 5th anniversary of Warhammer 40,000: Battlesector, we're releasing a new update for the game. As per usual, please let us know what you think of the list of changes. Your feedback is essential to keep improving the game.Changes since 1.7.4GeneralFixed issues with Sisters of Battle units not being available correctly in the Age of Crimson Dawn campaignAdded Divine Inspiration to Verity’s tech tree in Age of Crimson DawnUpdated the Enemy Army Generator to ensure that enemy units use variants and weapon upgrades to give more variety to enemy armiesUnitsUltramarinesTactical RepositionFixed issue where this would not affect the ability casterCaptainEmpowered Finest Hour fixed to give +1 action point (was +100% action points)Bladeguard VeteransShield Bash now costs 1AP (was 0AP)Now works as a Weapon attack, is more consistent and more clearly affected by buffs and debuffsTerm…
- Warhammer 40,000: Battlesector - 1.7.4 - Patch Notes - 2 July 2026
We're releasing a new update for Battlesector. As per usual, please let us know what you think of the list of changes. Your feedback is essential to keep improving the game. Changes since 1.7.1GeneralFix for Steam Deck users so that the game works on Proton 10 (default Steam Deck software) again.Addressed several issues with the in-game Map Editor to allow players to load and modify their maps correctly againFixed several Multiplayer desync issuesAdded additional logging for Multiplayer play to help the team verify and identify future desync issuesIncreased likelihood of getting different enemy factions in adjacent zones in Crusade Updated some icons and vfx Added new units barks for the Ultramarine Oath of Moment ability UnitsUltramarinesGeneralFixing Merit to the Chapter giving bonus Momentum when the unit kills the Oath of Moment targetBladeguard VeteransUpdate to Shield Bash to stop…
- Warhammer 40,000: Battlesector - 1.7.2 Open Beta & Steam Deck Fix - 29 May 2026
Hi,We have added an Open Beta branch to Battlesector on Steam to both help get an early fix for Steam Deck out to players and also to help the dev team diagnose some of the issues that we've had reported since the release of Ultramarines at Skulls 2026.The Open Beta has:A fix for Steam Deck users so that the game works on Proton 10 (default Steam Deck software) again.Additional diagnostic logging to assist with finding and reporting any stability and connectivity issues. These are currently focussing on boot-up issues and connectivity drops when playing Live Multiplayer.If you are willing and able, we would love it if our players could switch to this branch and to play the game as normal.Note for multiplayer users, this version of the game connects to a different server and so you will only be able to play against other users who are also on the Open Beta.We would really appreciate it i…
- Warhammer Skulls Festival - Free to try, Ultramarines DLC & Eradication Pack - 21 May 2026
Battlesector and Gladius are taking part in the Warhammer Skulls Festival. The Ultramarines have arrived in Battlesector and to celebrate this the base game will be free to try for the whole festival, while the Eradication Pack has just been released in Gladius. Let's take a look! Warhammer 40,000: BattlesectorWe are really excited to announce that the Ultramarines DLC is now available for Battlesector. This legendary Chapter brings a massive roster of eighteen units to the battlefield, embodying tactical perfection and unwavering discipline. Free to tryTo celebrate the release of the DLC, Warhammer 40,000: Battlesector will be free to try for the whole festival, from May 21st to May 28th. This is the first time that Battlesector is available as free to try and on top of this we are also releasing a free major update for the base game. This new update is focused on the Crusade game mode…
- Warhammer 40,000: Battlesector - Dev Diary #18 - Our Ways of War must change - 18 May 2026
"War, as with the Warp, is ever-present and always changing. However, the Codex Astartes grounds us in all circumstances. It is through its teachings that we serve the Emperor and keep the enemies of the Imperium at bay"Librarian Antolinus of the UltramarinesChange is good, isn’t it? Perhaps not, but it is at least always inevitable!Following the release of the Black Legion earlier this year, the Battlesector team have been breaking ground on several new fronts, and we thought it about time to let you know what’s afoot.Firstly, the Spring Update is nearly here and brings some very exciting new things. There’s too much for us to share entirely here, but there’s three big things that we have to share!As you’ll remember from our announcement and roadmap, the Ultramarines are the next faction to arrive in Warhammer 40,000: Battlesector. There will be more to say on their army list and uniqu…
- Battlesector & Gladius will take part in Warhammer Skulls Festival - 14 May 2026
We’re excited to announce that Warhammer 40,000: Battlesector and Warhammer 40,000: Gladius will be taking part in Warhammer Skulls 2026!The Skulls festival will run from Thursday, May 21st, at 5:00 PM UK until Thursday, May 28th.Don’t miss the live showcase on the official Warhammer Twitch channel on Thursday, May 21st at 5:00 PM UK time.Stay tuned, and discover more about Skulls here.
- Warhammer 40,000: Battlesector - 1.6.4 - Patch Notes - 19 March 2026
We're releasing a new update for Battlesector. As per usual, please let us know what you think of the list of changes. Your feedback is essential to keep improving the game.Changes since 1.6.3Bug FixesReverted changes to the Fortress of Redemption map. Units should no longer be floating 50 meters off the ground.
- Warhammer 40,000: Battlesector - 1.6.3 - Patch Notes - 12 March 2026
We're releasing a new update for Battlesector. As per usual, please let us know what you think of the list of changes. Your feedback is essential to keep improving the game.Changes since 1.6.001GeneralThis is a general bug fix and stability patch, reacting to some of the issues that we’ve seen reported since the release of the 1.6.001 patch and the Black Legion.There are several “under the hood” fixes that address errors that we have seen reported in our analytics and aim to increase general stability.BalanceGeneralOath of Protection (Celestian Sacresant) and Bodyguard (Ogyns) updated to match Guardian Protocols (Lychguard) and not be able to be disabled.Bug FixesRemoved purple corruption from the trees in the Feeding Grounds mapFixes to cover not being provided by some buildings on Despoiled LandsFixed description of For The Dark Gods to correctly state the 3x3 affected areaFixing Rapt…
- Black Legion is ready to despoil in Warhammer 40,000: Battlesector - 24 February 2026
Black Legion out nowThe most infamous Chaos Space Marines have arrived in Warhammer 40,000: Battlesector with a brand-new faction DLC, introducing fifteen fearsome units that bring the wrath of the Warmaster. Originally born from the once proud Luna Wolves, one of the original sixteen founding Legions of the Space Marines, these warriors fell from grace during the Horus Heresy of the 31st Millennium and were reborn as the dreaded Black Legion.Led by the feared Chaos Lord, the Sorcerers of Chaos, the Masters of Executions and the Cultist Firebrands, the faction offers a brutal arsenal. Chaos Terminators, Legionaries, Raptors, Chosen, and Havocs form the relentless backbone of the Black Legion’s armies, each contributing distinct tactical strengths. Supporting them are the terrifying Daemon Engines, whose power can unleash torment and savage destruction.With this DLC, available on Steam,…
- Black Legion DLC | Release date announcement - 17 February 2026
The wait is almost over, Commanders. We’re excited to announce that the next faction DLC for Warhammer 40,000: Battlesector — Black Legion — will launch on February 24th.Prepare to bring the might of the Warmaster’s chosen to the battlefield, with new units and new ways to dominate your enemies.
- Warhammer 40,000: Battlesector - Dev Diary #17 - Obscura nox incipit - 30 January 2026
Warriors, it’s been a while since we updated you on how Battlesector is proceeding, so now is the time. Firstly, a reminder that Battlesector was featured in December’s Slitherine Next presentation where we gave the first sight of the upcoming Black Legion faction and we also revealed our roadmap for 2026: The Battlesector team is hard at work bringing all of these plans to fruition and we’ll have more news on each of them throughout the year ahead. For today, however, we return to the subject of Abaddon's forces, the Black Legion. The ways of the warp are unpredictable at best, and whilst we had ambitions to release the faction to your beclawed hands in December last year, our machinations did not play out as we’d hoped. I can tell you that the Faction is now feature complete however, and it is in closed beta testing to ensure that we have a fantastic new force to add to Battlesector.…
- Black Legion DLC – Beta Sign-Ups Now Open - 8 January 2026
The forces of Chaos are gathering.We’re excited to announce that beta sign-ups for the upcoming Black Legion DLC for Warhammer 40,000: Battlesector are now officially open!The beta will be available on Steam, and players must own the base game Warhammer 40,000: Battlesector in order to access it. Once you’ve signed up, you’ll be notified automatically when the beta goes live.Sign up now here and prepare to spread Chaos across the battlefield.
- Warhammer 40,000: Battlesector | Black Legion showcase & Roadmap 2026 - 9 December 2025
Black Legion DLCFor the first time ever, we unveiled the Black Legion DLC, bringing the Warmaster’s most ruthless Chaos Space Marines into Warhammer 40,000: Battlesector.Fans got a full first look at units, abilities, and the sheer brutality the Black Legion will unleash when they arrive. More details and gameplay previews will follow soon—prepare your forces.Roadmap 2026We also lifted the veil on our 2026 roadmap, confirming two major additions coming next year:Ultramarines Faction – The Emperor’s finest will soon join the fray as a full, playable faction.New Narrative Campaign – A brand-new story experience is in development, expanding the Battlesector universe with fresh missions, characters, and strategic depth.New tournaments open for sign ups: Do not miss the chance to sign-up to two new tournaments: Domination Elimination and Dual Duals. You can sign-up here. The tournaments foll…
- Warhammer 40,000: Battlesector - 1.05.331 - Patch Notes - 3 December 2025
We're releasing a new update for Battlesector. As per usual, please let us know what you think of the list of changes. Your feedback is essential to keep improving the game.Changes since 1.5.330This patch is for PC platforms only, the issue that it fixes was not present on PlayStation or Xbox.Bug FixesGeneralFixed issue that was causing Assault Terminator Lightning Claws and Storm Shields to be rendered without textures
- Warhammer 40,000: Battlesector - Black Legion DLC | Important news - 2 December 2025
Players, We wanted to inform you that the release of the upcoming Black Legion DLC for Warhammer 40,000: Battlesector has been delayed. The team is working hard to ensure the new content meets the level of quality you expect, and we appreciate your patience and support. We're sorry that the DLC won't be releasing this year as intended. We’ll be sharing more details, updates, and a closer look at what’s coming during Slitherine Next, our live streaming event on December 9th. We hope you’ll join us as we reveal what's next for Battlesector. Thank you for your understanding.
- Warhammer 40,000: Battlesector - 1.05.330 - Patch Notes - 13 November 2025
We're releasing a new update for Battlesector. As per usual, please let us know what you think of the list of changes. Your feedback is essential to keep improving the game.Changes since 1.5.328Bug FixesOrksKustom Boosta-blastaFixed issue with Splash Damage, now splashes to one additional unit (was zero)Fixed issue where Rivetin’ Dakka was unlocked incorrectly in crusadeGeneralFixed issue for PlayStation and Xbox players where the second player in Hotseat was not able to change their army or use some UI elementsFixed issue where hovering units weren’t able to charge over the top of allies and low obstaclesFixing some issues with initially unlocked techs not being shown as purchased in Tech Trees in Crusade mode (partial fix only)
- Black Legion DLC announcement & Warhammer day patch - 23 October 2025
To celebrate Warhammer Day, we are really excited to share some really important news about Warhammer 40,000: Battlesector.As part of the celebration, all our Warhammer games have joined a special sale, starting from 7.00pm CEST. Please check our steam page to see all the details:https://store.steampowered.com/dev/slitherineBlack Legion DLC The Black Legion will arrive as a playable faction in Battlesector on December 9th. The Black Legion, the dreaded sons of Horus, are the latest faction to join Warhammer 40,000: Battlesector. Fifteen new units will be at our disposal to fight for the galaxy.Unit ListChaos LordSorcererMaster of ExecutionsLegionariesChosenHavocsRaptorsChaos TerminatorsHelbruteForgefiendVenomcrawlerObliteratorsChaos RhinoCultist FirebrandChaos Cultist Mob & WarbandHeldrakeFree major update - 1.05.328 - Patch NotesWe are very happy to announce that a new free major updat…
