Left 4 Dead, developed by Counter-Strike makers Turtle Rock Studios, is a co-operative multiplayer action game, using the Source Engine, and also introducing Turtle Rock's v2.0 A.I. technology. Originally slated for late 2007, delayed until Q1 2008, then rescheduled for Aug./Sept., in a recent interview Valve's Doug Lombardi revealed that while the game is basically complete it will now launch simultaneously on Xbox 360 and PC in November 2008.
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