Left 4 Dead 2 DLC Achievements emerge

Ahead of the planned release of The Passing DLC for Left 4 Dead 2, Valve has teased us with a released achievement list:

Torch Bearer, Port of Scavenge, Fore! and Til It Goes Click are to name but a few of the new challenges to await players, and they cover everything from "Survive The Passing Campaign" to "Play 6 Mutations", whatever that means.

There's hints and spoilers galore in this list, and you can check out the complete version here.