This DLC for Warhammer 40,000: Space Marine enhances the multiplayer experience by allowing players to take on the role of Chaos Space Marines in the 4-player Co-op mode, fighting against Imperial Guard and standard Space Marines. Released in 2011 for PC, this add-on requires the base game and introduces three new multiplayer maps alongside unlockable achievements, focusing solely on expanding cooperative combat scenarios rather than adding story content.
The primary feature of this expansion is the introduction of the Chaos Space Marines as a playable faction within the 4-player Co-op mode. This allows players to fight against the forces of the Imperium, specifically the Imperial Guard and standard Space Marines, reversing the typical allegiance seen in the base game's narrative structure.
While the core third-person shooter mechanics remain consistent, integrating the Chaos faction fundamentally alters the cooperative experience. Players now engage in battles from the perspective of the antagonists, facing off against the Imperium's forces. This shift in perspective and team composition provides a distinct tactical challenge within the established co-op framework.
To support these new factional battles, the pack includes three entirely new multiplayer maps designed for these expanded combat scenarios. Additionally, players who engage with this new content will find new achievements available to unlock, offering further goals for progression within the multiplayer ecosystem.
This content integrates directly into the existing multiplayer infrastructure of the parent game. It is not a standalone title; access is contingent upon owning the base game. The scope of this addition is concentrated on providing fresh replayability and factional variety for cooperative play, rather than adding substantial story chapters or new single-player campaigns.
This specific map pack was made available for the Microsoft Windows (PC) version of the game.