Four weary humans work together in an apocalyptic world overrun by grotesque zombies in Left 4 Dead 2. Along with new protagonists and five new campaigns, this PC game also offers more enemy types to battle and a host of new weapons and tools to improve your chances of survival, including a katana, a baseball bat, and a defibrillator to revive fallen foes. In each campaign area--whether Coney Island-style amusement park or Louisiana Bayou--lurks distinct enemies to face. The "Dark Carnival" campaign, for example, features zombies wearing clown makeup, while in "Swamp Fever" there are creatures known as mudmen. In addition to the original‘s co-op campaigns, survival mode, and versus mode, Left 4 Dead 2 introduces a new multiplayer mode entitled "scavenge." Team up with your friends and strive together for survival in a world filled with danger.