Valve have released eight new screenshots for their upcoming survival horror title Left 4 Dead.

Left 4 Dead is a new action title from Valve, creators of the Counter-Strike and Half-Life games, and promises to redefine the co-operative genre as those titles did for multiplayer and single player action games.

Set in a modern day survival-horror universe, the co-operative gameplay of Left 4 Dead casts four “Survivors” in an epic struggle against hordes of swarming zombies and terrifying “Boss Infected” mutants.