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## Developer : Valve

http://www.valvesoftware.com/


## System Requements :

* OS: Windows Vista, XP or 2000

* CPU: 3.0 GHz P4, Dual Core 2.0 or AMD64X2 (or higher)

* RAM: 1 GB for XP / 2GB for Vista

* Disc drive: DVD-ROM Drive

* Hard drive: At least 7.5 GB of free space

* Video: Direct X 9 compatible video card (Video card must be 256 MB or more and should be a DirectX 9-compatible with support for pixel shader 2.0)

* Sound: Direct X9.0c compatible sound card  

## Comment : New from Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, cooperative action-horror game for the PC and Xbox 360, which carries up to four players in an epic struggle for survival against the many hordes of zombies and terrifying mutant monsters.
Set immediately after the zombie apocalypse. Cooperative survival mode in L4D allows you to modify your way through the infected in four unique "movies," guiding your survivors characters through the roof of an abandoned capital in rural ghost towns and pitch-black forests in the middle of your journey to escape the devastated elevation - zero infested with infected enemies. Each "movie" is comprised of five large maps, and can be played by one to four players, with an emphasis on team-oriented strategy and goals.
New dynamic technology called developers "AI Director", where the game changes depending on how players behave, adjusting them to the level of complexity. In Hollywood movies, everywhere there are new monsters depending on the noise variance, the method of play and the surrounding reality. It all depends on how the team plays..