Valve (Counter-Strike creators, Half-Life and more) is a cooperative action horror game Left 4 Dead that reaches four players in an epic struggle to survive the zombie armies for PC and Xbox 360, and the dreaded mutant monsters. Immediately after the zombie apocalypse, the L4D's survival cooperative mode allows you to take footpaths in four unique “movies en that lead survivors to the rooftops of an abandoned metropolis, rural ghost towns and pitch blacks. Forests in your quest to escape. Each film movie beş consists of five large maps and can be played by one to four human actors with emphasis on team-based strategies and objectives. The new technology called "AI Director" is used to create a unique gaming experience every time you play. The director adjusts the frequency and harshness of zombie attacks to your performance, leaving you in the midst of a fast-paced but not overwhelming Hollywood horror movie.