Warhammer 40K Space Marine 2’s upcoming update has been revealed with a teaser trailer. The developer Saber Interactive is finally bringing the highly anticipated Horde mode, now renamed Siege mode, to this third-person action shooter game. This update also adds PvE game modes and new DLCs. The game will be available for the public test server starting June 4, 2025. Let’s explore more about the Warhammer 40K Space Marine 2 Siege Mode release date and other details below.
Space Marine 2 Siege Mode
The new teaser trailer showcases the first gameplay footage for Warhammer 40K Space Marine 2’s long-awaited Siege Mode. This new mode includes the following features:
- PvE: The main feature of Siege mode is the new Player versus Environment experience, which is free for everyone.
- 3 Player Mode: The update also introduces a 3-player co-op mode that emphasizes endurance and teamwork.
- Endless Waves: Face increasingly challenging hordes of enemies who are now deadlier and more difficult to defeat.
- Resource Management: Earn points to acquire ammunition, equipment charges, medical stims, and call for reinforcements like a Dreadnought.

Siege Mode Cosmetic DLC
Two new DLCs will be available for Ultra Edition, Gold Edition, and Season Pass holders. These include:
White Scars Chapter Pack
- Assault Class Champion Skin: A new skin inspired by the White Scars Chapter.
- Exclusive White Scars-themed skins for the Occulus Bolt Carbine, Stalker Bolt Rifle, and Combat Knife.
- Cosmetic Options: Additional armor pieces and heraldry markings for White Scars Successor Chapters.
Blood Angels Cosmetic Pack
- Armor Pieces: New armor options applicable to all playable classes.
- Heraldry Markings: Celebrating eight of the Blood Angels’ Successor Chapters.
These cosmetic packs allow players to further personalize their Space Marines, showcasing allegiance to their chosen Chapters.

Siege Mode Release Date and Platforms
Warhammer 40K Space Marine 2 Siege Mode will be available for free on June 26, 2025. Siege mode is one of the largest post-launch updates and will be available on PlayStation 5, Xbox Series X|S, and PC. The Siege mode will also be available for early access via the public test server for PC players on June 4, 2025.
Summary
The highly anticipated update for Warhammer 40K Space Marine 2 will soon be available as the Siege Mode. Patch 8 and the new Siege mode are free for all. It introduces a new PvE experience, two new DLC packs, and a new 3-player mode. The Siege mode also features endless waves of enemies and increased difficulty levels.
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