Left 4 Dead 2 +

Left 4 Dead 2 is a cooperative first-person shooter game. It is the sequel to Valve Corporation's award-winning Left 4 Dead. The game launched on November 17, 2009, for Microsoft Windows and Xbox 360 in the US and November 20th in the EU and UK. It builds upon the cooperatively focused gameplay of the original and uses Valve's proprietary Source engine, the same game engine used in Left 4 Dead. The game made its world premiere at E3 2009 with a trailer during the Microsoft press event.