Left 4 Dead 2 is a cooperative first-person shooter video game developed and published by Valve Corporation. The game is set in the aftermath of a global pandemic that has left most of the world infected with a zombie virus. It is up to the player and their team to survive the hordes of zombies that are trying to kill them. The game can be played by up to four players at a time, making it a great option for those looking for a cooperative multiplayer experience.