The world has been overrun by creatures of horror, and you are one of only a handful of surviving humans. From the eerie, remote countryside to the asphalt expanse of shadowy urban centers, the streets and fields teem with zombies and mutants intent on the destruction of all humans. Harness your weapons and prepare for the fight of your life as you struggle to destroy the monstrous creatures before they destroy you.Left 4 Dead deposits you in a terrifying modern world swarming with zombies and "Boss Infected" mutants with horrifying superhuman abilities. Team up with up to three additional players in Survivor Co-op mode as you assume the role of Survivors struggling against your own potentially imminent extinction, completing four sprawling campaigns, each with five new maps that will take you into both deadly urban environments and sinister rural areas. Or explore the possibilities of Vs. mode, in which you can play as either a Survivor or one of four types of Boss Infected mutants, each with astonishing features, such as a 50' tongue lasso or a belly full of explosive methane gas. Prepare to face allies and enemies driven by advanced artificial intelligence that makes each outing into the Left 4 Dead universe one filled with unique and potentially deadly surprises.