Finally we have a concrete date for the new L4D2 DLC: The Passing. Mark it on your calendar folks as tomorrow…Yes April 22, 2010…Valve will finally give us what we all wanted. Sadly the PC users get it for free and 560MS Points for 360 users again which really sucks the big floppy one but what can you do?

Further to that we now have more info on the achievements.

Torch Bearer
Survive The Passing Campaign.

Port of Scavenge
Play 5 full games of Scavenge on The Port.

Fore!
Knock off the heads of 18 infected with the golf club.

Til It Goes Click
Using the M60, kill 25 infected without letting go of the trigger.

Killing Them Swiftly To This Song
Play the new Midnight Riders song on a jukebox.

Wedding Crasher
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.

Cache Grab
Open 5 foot lockers.

Kite Like a Man
Kill a tank only with damage from the original Survivors.

Grave Robber
Collect 10 items dropped by a Fallen Survivor.

Mutant Overlord
Play 6 Mutations.

Some explanation on “Mutations” as explained on the blog post:

The Passing also introduces a series of weekly game mode events dubbed “Mutations.” These week-long runs of new gameplay modes range from “Realism Versus” mode to “Chainsaw Massacre,” which gives all players chainsaws with an unlimited supply of gasoline. There are over 20 Mutations planned, each playable on all L4D2 Campaigns. Mutations are exclusively available to owners of “The Passing” DLC.

In addition, “The Passing” offers a new co-operative challenge mode of play, support for infected bot play in Versus, a new “uncommon common” zombie class (the fallen survivor), melee weapon (golf club), and firearm (M-60).