Left 4 Dead

New from Valve — creators of Counter-Strike, Half-Life and many other games — Left 4 Dead — is a new game for PC and Xbox 360, which is an epic battle of four "Survivors" with hordes of countless zombies and terrible mutant "Zombie Bosses".
The action takes place immediately after the long-awaited apocalypse that turned everyone into zombies. The four surviving heroes will fight for their lives, finding themselves either in an unknown city, or somewhere far beyond its borders, while their surroundings will constantly change, like scenes from a movie. In each scene offered by the creators of the "movie" four heroes have to complete a particular task; both one and four players can play, for each plot they are offered five cards.
The new dynamic system, called "AI Director" by the developers, changes the course of the game depending on how the players behave, adjusting the level of difficulty. As in Hollywood films, new monsters appear from everywhere, the sound and the surrounding reality change — it all depends on how the playing team operates.