Left 4 Dead (abbreviated as L4D) is a cooperative first-person shooter arcade-style video game. It was developed by Turtle Rock Studios, which was purchased by Valve Corporation during development. The game uses Valve's proprietary Source engine, and is available for Microsoft Windows, Xbox 360 and Mac OS X.
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Turtle Rock Studios, the development team behind co-op zombie shooter Left 4 Dead, today announced they're developing a ...