When was Left 4 Dead 2 released?

Left 4 Dead 2, the cooperative first-person shooter video game developed and published by Valve Corporation, was released on November 17, 2009. The game is set in a post-apocalyptic world infested by hordes of zombies, where players must work together to survive and fight their way through various campaigns. Left 4 Dead 2 introduced new characters, weapons, and infected types, enhancing the gameplay experience and offering a refreshed take on the popular franchise.