Left 4 Dead (Full Rip)

New from Valve — creators of Counter-Strike, Half-Life and more — Left 4 Dead is a new game for the PC and Xbox 360 that casts up to four "Survivors" in an epic struggle against hordes of swarming zombies and terrifying "Boss Infected" mutants.
Set in the immediate aftermath of the long-awaited zombie apocalypse, L4D's survival co-op game mode is played out across four sprawling "Movies" set in a variety of urban and rural environments. Each "Movie" has an over-riding team objective, is comprised of five large maps, and may be played by 1 to 4 human players.
New technology dubbed "the AI Director" is used to procedurally generate a unique experience each time the game is played. Just as in Hollywood films, the Director calls for new monsters, sounds, and action as it tailors the gameplay experience based upon the team's performance.

Features
* Addictive co-op action gameplay from the makers of Counter-Strike and Half-Life
* Advanced artificial intelligence drives both friendly and unfriendly creatures to dynamically create intense single-player, co-op, and multiplayer experiences every time the game is played
* 20 new maps. 10 new weapons. Four sprawling "Movies"
* Match making, stats, rankings, and awards system drive collaborative play
* Designer's Commentary mode allows gamers to go "behind the scenes" of the game
* Powered by Source and Steam

Hardware Requirements

* Supported OS: Microsoft Windows XP / Vista / Vista64
* Processor: Pentium 4 3.0GHz
* Memory: 1 GB
* Graphics: 128 MB, Shader model 2.0, ATI 9600 or better

Recommended:

* Supported OS: Microsoft Windows XP / Vista / Vista64
* Processor: Intel core 2 duo 2.4GHz
* Memory: 1 GB
* Graphics: 128 MB, Shader model 3.0, NVidia 7600 or better