The premium add-on pack called The Dreadnought, adds a new multiplayer mode called Dreadnought Assault where both teams battle to capture a central location on the map and the winners spawn a player controlled Dreadnought. The Dreadnought is armed with an Assault Cannon / Auto Cannon, a Meltagun and a Power Fist / Power Claw and must capture points across the map to score points for their team. Once the Dreadnought is destroyed a new spawn point will appear.

The Dreadnought DLC also includes three new multiplayer maps Desolation, Dome Mechanicus and Chem Refinery, as well as new achievements / trophies and has a suggested cost of 800 Microsoft Points / US$9.99.

In addition to the premium add-on content all players of Space Marine will receive a new multiplayer Capture and Control Mode for free. Playable on all the game’s multiplayer maps, this team based mode challenges players to capture and defend locations around the map to score points.