The L.A.W. That Broke The Camel’s Back
Deliver the Killing Blow to the Patriarch with a L.A.W. Rocket.
Flaming Hell, That was Close
As Firebug, kill the Husk with the Flamethrower before he hurts anyone.
Fending off Mrs. Claws
[2010 Xmas] Kill 3 Christmas Stalkers with a Lever Action Rifle without reloading.
Deck the Halls with Buckets o’ Blood
[2010 Xmas] Kill 3 Christmas Zeds in 1 ZED time chain with a Melee weapon.
Tis Better to Give than to Receive
[2010 Xmas] Drop 3 Tier 3 weapons for others (with which they kill at least one Christmas Zed).
[2010 Xmas] Get covered in Christmas Bloat Bile and live for 10 seconds on Hard, Suicidal, or Hell on Earth.
Survive 10 seconds after being screamed at by a Circus Siren on Hard or above.
A Bloody Christmas Carol
Kill 15 XMas Clots, 5 xmas Stalkers, 5 XMas Crawlers, 1 XMas Siren and 1 XMas Bloat.
Get the 6 Special Halloween Achievements plus 1 Hillbilly Horror Map Achievement to unlock the Grim Reaper
Rippin’ It Up
Kill a Hillbilly Husk and another Hillbilly Zed in the same shot with the Buzzsaw Bow or M99
Extended Motion Protector
[2013 Summer] Protect the Ringmaster during the escort mission so that he does not get hit more than 15 times
Guardian Assault Protector
Protect the ringmaster during the defense mission so that he does not get hit more than 15 times
Kill 4 different types of Zeds with headshots with 4 shots from the Long Musket or the M14 without reloading
Assault Flayer Ordinance
Push a scrake back with the direct fire from a Hunting Shotgun or alt fire from the Multi-Chamber ZED Thrower
Single-Load Doom Bombardier
Kill a ZED with a direct (unexploded) shot from the Orca Bomb Propeller or the M-79/M32
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
Fire and Forget
Kill a Halloween Fleshpound and Scrake in the same explosion with the Seal Squeal Harpoon Bomber or the LAW
Most Bang for the Buck
Kill 10 Halloween zeds in explosions using the Seeker 6 or the M32 within 5 seconds
Transit – Get all Objective achievements AND beat KFO Transit on Hard or above to unlock Dr Rachel Clamely.