THQ and Relic have let it slip that Warhammer 40,000: Space Marine will feature a four player co-operative mode, however you may disappointed to hear that it will not be shipped with the disc. In fact, the co-op mode will arrive later than the actual game, with a release date pointing towards early October.
Creatively named "Exterminatus", the mode will pitch players against waves of enemies, attempting to survive for as long as they can.
Space Marine is due out on PlayStation 3, Xbox 360 and PC on September 6 in the U.S., and September 9 in mainland Europe.