Left 4 Dead

Set in a modern day survival-horror universe, the co-operative gameplay of Left 4 Dead (L4D) casts four "Survivors" in an epic struggle against hordes of swarming zombies and terrifying "Boss Infected" mutants. Developed by Turtle Rock Studios and Valve, creators of the Counter-Strike and Half-Life games, the latest AI technology allows for multiplayer games of one to eight players.