At this point just about every shooter coming out has some form of "survive as long as possible" cooperative mode. Space Marine joins the crowd with a mode called Exterminatus; a four-player survival mode that pits your few marines against an untold multitude of orks. Far from breaking the mold, this uninventive mode is nonetheless still fun, and should give day-one purchasers something to look forward to when it releases some 30 days after Space Marine's launch...