this clan is funny...

Valve plans to release the first Left 4 Dead 2 DLC campaign, "The Passing," on Xbox 360 and PC. The Passing will feature non-playable appearances by the original Left 4 Dead cast (those shadowy figures in the background there), who will aid L4D2's four survivors during the third act of the new campaign, which is set in rural Georgia. Valve confirmed that The Passing will also include new arenas for Survival, Versus and Scavenge modes, and a new co-op challenge mode. Players will also encounter a new "uncommon common" infected, dubbed the Fallen Survivor, which can drop random items when killed. The Passing is currently on track for a "late March" release.