“Left 4 Dead 2” is the sequel to the best-selling and critically acclaimed cooperative multiplayer smash from Valve, creators of “Half-Life,” “Portal,” “Team Fortress” and “Counter-Strike.” Introducing melee weapons and new enemies to the original’s award-winning gameplay, “L4D2” casts players as one of four new “Survivors” battling zombie hordes as they travel from Savannah, Ga., through New Orleans’ French Quarter.

Coming exclusively to Xbox 360 and PC, L4D2 promises to set a new benchmark for co-operative action games and become one of 2009’s marquee titles. Set for release on November 17, the title adds melee combat to enable deeper co-operative gameplay, with items such as a chainsaws, frying pans, axes, baseball bats, and more.