Left 4 Dead 2

It is a first-person shooter video game. The sequel to Valve Corporation's Left 4 Dead, the game was released for Microsoft Windows and Xbox 360 in November 2009. Left 4 Dead 2 is set during the aftermath of an apocalyptic pandemic, and focuses on four survivors fighting against hordes of the undead. The game made its debut at the 2009 Penny Arcade Expo, and was released to critical acclaim.