Warhammer 40,000: Space Marine will be out this week and Relic revealed that there will be a Co-Op mode for the game. However, the Co-Op mode will not be ready when the game is launch and will be released in early October.

Good news is that the DLC for the Co-Op mode will be free of charge. The Co-Op mode is called Exterminatus and it includes four maps, four player Co-Op, and  it will be FREE.

Warhammer 40k: Space Marine will be out on September 6 and will be available for PC, PlayStation 3, and Xbox 360.