Warhammer 40,000: Battlesector — patch notes and updates
Stored observation / content update:
Dated developer announcements recorded from Steam. Open the source for the complete update.
| Update | Date | Excerpt / source |
|---|---|---|
| Warhammer 40,000: Battlesector - Dev Diary #18 - Our Ways of War must change | 2026-05-18 | "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 |
| Battlesector & Gladius will take part in Warhammer Skulls Festival | 2026-05-14 | 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 | 2026-03-19 | 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 | 2026-03-12 | 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 |
| Black Legion is ready to despoil in Warhammer 40,000: Battlesector | 2026-02-24 | 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 Havoc |
| Black Legion DLC | Release date announcement | 2026-02-17 | 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 | 2026-01-30 | 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 becla |
| Black Legion DLC – Beta Sign-Ups Now Open | 2026-01-08 | 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 | 2025-12-09 | 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 |
| Warhammer 40,000: Battlesector - 1.05.331 - Patch Notes | 2025-12-03 | 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 | 2025-12-02 | 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 | 2025-11-13 | 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 unl |
| Black Legion DLC announcement & Warhammer day patch | 2025-10-23 | 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 ExecutionsLe |
| Warhammer 40,000: Battlesector - 1.05.320 - Patch Notes | 2025-09-30 | We are releasing a new major update for Battlesector. This is going to be the first of two updates that bring new features, a new game mode, a new free unit and great news regarding future releases. Today's major update focuses on the latest Crusade mode and introduces a new map. Next major update, releasing on Oct. 23rd, will bring a new game mode and a new free unit. 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 1.5.297GeneralUpdates to the Crusade Campaign (see below for more info)Added new Skirmish map - MunitorumFight over an Imperial Munitorum |
| Deeds of the Fallen DLC | Vlog #2 - Research | 2025-07-25 | Welcome to the second episode of our behind-the-scenes vlog on Warhammer 40,000: Battlesector – Deeds of the Fallen. This time, we explore the deep dive our team took into the lore and universe of Warhammer 40,000. From poring over codices to working closely with Games Workshop, discover how research shaped the characters and storylines of Deeds of the Fallen. Get a glimpse of the creative foundations that drive the game forward.Deeds of the Fallen DLC | Vlog #2 - Research |
| Warhammer 40,000: Battlesector - 1.05.297 - Patch Notes | 2025-07-24 | 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 1.5.288GeneralThis is a patch fix update to address some issues that were added with the Deffkilla UpdateBug FixesFix for Valkyrie not returning transported units to the battlefieldCorrected tooltip on the Reinforcements option when starting a Daemonic Incursion campaignCorrected Deffkilla HQ priority so more likely to be the CP ability userUpdating some charge abilities (Furious Charge, Devastating Charge, Battering Ram) to correctly ignore pistol reaction s |
| Warhammer 40,000: Battlesector | 25th Slitherine anniversary update | 2025-07-10 | To celebrate our 25th anniversay, during Slitherine Next we have announced a new update, releasing today. On top of several fixes and balances, this new update features a new brand unit: the Deffkilla Wartrike. In order to be usable in your armies, players must own the Ork Faction DLC. During the event, we talked about the origin of the game, its history and also the next steps. In case you missed the event, you can rewatch it here: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 1.5.275GeneralAdded new unit for the Ork Faction, the Deffkilla WartrikeTh |
| Warhammer 40,000: Battlesector | Defence of Eonis tournament sign-ups | 2025-07-09 | You still have the chance to sign-up to the new Defence of Eonis tournament which will feature the new multyplayer map: Defence of EonisYou can sign-up here. The tournament follows Swiss Tournament rules: you can find the full list of rules here. The first round will commence on Friday, 11th July 2025 at 11.00am GMT. No further entries can be accepted after the tournament has begun. The tournament will last 3 rounds, 11 days each. Games are paired, so each matchup will be played both ways. All you need to do is sign up, then the system will pair you with opponents and create your PBEM games. You will be notified by mail of when the tournament |
| Deeds of the Fallen DLC | Vlog #1 - Map Design | 2025-06-27 | Welcome to the first episode of our behind-the-scenes vlog on Warhammer 40,000: Battlesector – Deeds of the Fallen. In this chapter, we dive into the art and strategy of Map Design. Discover how our team crafted the immersive battlefields that bring the grimdark universe of Warhammer 40,000 to life. Join us on this journey through the war-torn landscapes that set the stage for epic clashes.Deeds of the Fallen DLC | Vlog #1 - Map Design |
| Warhammer 40,000: Battlesector - 1.05.275 - Patch Notes | 2025-06-26 | 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 1.5.264GeneralThis update fixes several bugs and issues and adds expanded functionality to the Crusade game modeAdded New Skirmish map for SP and MP: Defence of EonisFirst steps to updating how enemy armies are selected for game modes like Crusade and Planetary Supremacy to try and reduce instances of massively overpowering enemy armies at low player level (more to come on this in the future)CrusadeRework of the level up rewards. There are now 40 upgrades div |