Complete all new map achievements on Suicidal Difficulty.

Get 4 of 6 of the 2013 Summer Event in-game level Achievements, one Standard and one Objective Mode map completion Achievement, plus the Punk'd Achievement to unlock Steampunk Mrs. Foster

Decapitate a burning Halloween specimen in Bedlam

Defeat the Patriarch on Suicidal.

Protect the ringmaster during the defense mission so that he does not get hit more than 15 times

Free the souls of the 25 Gnomes hidden on Hillbilly Horror in 1 game

Collect all the Beer Steins

Transit - Destroy all the DNA vials

Collect all the Treasure Bags

[2013 Summer] Destroy all the Pukey the Clown dolls

Clandestine - Destroy 30 skulls

Give 1,000 Pounds to Teammates who have 50% of Your Cash or Less.

[2010 Xmas] Drop 3 Tier 3 weapons for others (with which they kill at least one Christmas Zed).

Drop 5 different Tier 2 weapons in one wave.

Get the Not-a-war-hammer Achievement in Dwarfs!?

[2013 Summer] Protect the Ringmaster during the escort mission so that he does not get hit more than 15 times

Collect all the bile without a contamination

Have 20 Zeds you slowed with the Z.E.D. gun killed

Get 1000 points of burn damage with the MAC-10.

Kill 4 different types of Zeds with headshots with 4 shots from the Long Musket or the M14 without reloading

Turn 500 Zeds into Giblets using the M79.

Kill 30 Fleshpounds with the Dwarfs!? axe with back attacks

Heal 200 teammates with the MP7's medication dart.

Heal others for 3000 points of health with the MP5 SMG