Saber Interactive has officially opened the Steam Workshop for Warhammer 40,000: Space Marine 2, providing players with a centralized hub for community-created modifications. The update, announced on July 30, 2026, allows users to browse, install, and manage mods directly through the Steam client.
Modding Restrictions and Private Sessions
To maintain the integrity of the core experience, the developer has implemented strict technical requirements for players using custom content. If you choose to install mods, the game will automatically restrict you from joining public matchmaking queues. Instead, you will be moved into a private lobby.
These private sessions allow for multiplayer, but you must invite other players using direct invites or specific session codes. Additionally, a clear watermark will appear in the top-right corner of the screen whenever a modded session is active, ensuring that all participants are aware of the game's state.
Separation of Progression
A critical impact for players is the segregation of save data. Your character progression within modded sessions is entirely separate from your official, unmodded game progression. This ensures that custom content does not interfere with standard multiplayer rankings or achievements.
Getting Started as a Creator
For those interested in building their own modifications, Saber Interactive has provided a dedicated guide on the Steam Workshop page. Potential creators are required to review the official modder guidelines and the associated legal notice before beginning development to ensure compliance with the game's operational standards.