Arriving almost exactly a month later than originally scheduled, the Left 4 Dead 2 add-on campaign, “The Passing,” will be released next week, complete with a few new weapons, a new uncommon common named the “Fallen Survivor,” an encounter with the original Left 4 Dead 1 cast, and even two new gameplay modes!

Even a new Midnight Riders track will be in it, entitled “Save Me Some Sugar.”

It is currently unknown exactly what the two gameplay types will be. The add-on will cost 560 MSP.

Valve has promised more news on the new campaign within the week, so keep an eye out!