From Killing Floor Wiki
Achievements are meta-goals defined outside of Killing Floor's direct gameplay parameters. There are currently 185 total achievements, 90 of which are map completion achievements.
Merry Friggin Christmas
Kill the Christmas Patriarch.
Tis Better to Give than to Receive
Drop 3 Tier 3 weapons for others (with which they kill at least one Christmas Zed).
Deck the Halls with Buckets o' Blood
Kill 3 Christmas Zeds in 1 ZED time chain with a Melee weapon.
Who Brings a Gun to a Snow Ball Fight?
Kill a Christmas Husk with any Pistol.
Get covered in Christmas Bloat Bile and live for 10 seconds on Hard, Suicidal, or Hell on Earth.
Back to Work
Kill 20 Christmas Clots in one wave.
Fending off Mrs. Claws
Kill 3 Christmas Stalkers with a Lever Action Rifle without reloading.
Not So Silent Night
Kill a Christmas Siren with an undetonated LAW rocket.
Cracked the Nutcracker!
Land the killing blow on a Christmas Fleshpound with a Knife.
Can't Catch Me!
Kill 2 Christmas Gorefasts with a Melee weapon from behind in one wave.
Toasted Jack Frost
Kill the Christmas Scrake with a Fire-based weapon.
Rudolph, the Bloody Nosed Reindeer
Kill a Christmas Crawler with a Crossbow.
That's not Santa!
Kill 3 Christmas Bloats with the Bullpup in one wave.
Unlock 10 of the 13 Christmas Achievements along with any Christmas Map achievement.
Kill 15 Husks with the Husk Cannon.
Kill a Scrake, a Fleshpound, and the Patriarch with the Claymore Sword within one map.
Kill 1 specimen ONLY while expending a full M4 Assault Rifle magazine.
Hit a Scrake with the M203 Rifle grenade to kill him.
I love ze Healing not ze Hurting
Heal others for 3000 points of health with the MP5 SMG.
Italian Meat Pasta
Kill 12 zeds with a full magazine from the Combat Shotgun.
Kill a specimen with every shot from your Revolver for one magazine.
We Have Ourselves a Cowboy
Hold dual 9mm, dual hand cannons and Dual Revolvers.
A Bloody Christmas Carol
Kill 15 XMas Clots, 5 xmas Stalkers, 5 XMas Crawlers, 1 XMas Siren and 1 XMas Bloat.
Summer Sideshow 2011
Kill the "Ring Leader" (Circus Patriarch).
Sparing with a Master
Kill a Circus Gorefast with a Melee Weapon.
Kill 2 Circus Stalkers with a Melee weapon to the back in one wave.
Kill 5 Circus Crawlers with a Bullpup in one wave.
Clearing Clown Alley
Kill 5 Circus Bloats in one game.
The Big Hunt
Kill a Circus Scrake with a Crossbow.
Lifting a Dumbell
Kill a Circus Husk with a LAW.
Kill 3 Circus Clots in a wave with the Lever Action Rifle.
Land the killing blow on a Circus Fleshpound with a Pistol
Drop 5 different Tier 2 weapons in one wave.
Survive 10 seconds after being screamed at by a Circus Siren on Hard or above.
Taking Down the Big Top
Kill 4 Circus Zeds in 1 ZED time chain with a Melee weapon.
Burning up the Midway
Kill 10 Circus Clots with a Fire-based weapon.
Unlock 10 of the 13 Circus Achievements along with any Abusement Park achievement.
Summer Sideshow 2012
Kill 12 clots with one magazine without reloading (MK23)
Kill a zed that has injured a player (M7A3 rifle)
Kill one of each type of zed in one game, including the Patriarch (HSG-1 shotgun)
Kill a zed each with both the Bullpup and FN-Fal
The Big One
Kill 2 scrakes with one shot (M99)
Sparkling in the Twilight
Kill The Vampire Patriarch in Bedlam.
Carving The Jack O' Lantern
Decapitate a burning Halloween specimen in Bedlam.
The Scene is Zed
Kill 250 Halloween Specimens in Bedlam.
Win a Long Bedlam Match During the Halloween Event on Hard.
This is No Ordinary Rabbit!
Kill 25 Halloween Scrakes in Bedlam.
Trick, not Treat
Kill 5 Halloween Specimens with any gun without reloading
Rule The Roost
Get all 6 achievements and unlock Commando Chicken.
Let Them Burn
Get 1000 points of burn damage with the MAC-10.
Obliterate 10 Zeds at once with the Pipe Bomb.
Random Axe of Kindness
Kill 15 Specimens with a Fire Axe in a Single Wave.
Kill 4 Specimens with a Single Shot from a Hunting Shotgun.
As a Medic, Kill 8 Specimens using a Knife in a Single Wave.
Flaming Hell, That was Close
As Firebug, kill the Husk with the Flamethrower before he hurts anyone.
Kill 2 Scrakes with a Chainsaw in a Single Wave.
The L.A.W. That Broke The Camel's Back
Deliver the Killing Blow to the Patriarch with a L.A.W. Rocket.
Heal 200 teammates with the MP7's medication dart.
Kill 20 crawlers in mid-air with the M79 (explosive kill).
Kill 1000 Specimens with the SCAR.
Hot Cross Fun
Kill 25 Burning Specimens with a Crossbow.
Turn 500 Zeds into Giblets using the M79 (in solo mode).
Kill the Patriarch when everyone is ONLY using Crossbows.
As Demolitions, kill 1000 Specimens with the Pipebomb.
Kill 100 Fleshpounds with the AA12.
Dot of Doom
Get 25 headshots in a row with the EBR while using the Laser Sight.
Kill 8 Specimens with One Grenade.
Individual kill achievements
It's Not Easy Being Greasy
Cause a Specimen to Die by Luring them into Bloat Acid.
Too Close For Comfort
Finish off a Fleshpound using a Melee Attack.
Kill the Patriarch Before he has a Chance to Heal.
Death To The Mad Scientist
Defeat the Patriarch on Suicidal.
Multiple kill achievements
Kill 100 Specimens.
Kill 1,000 Specimens.
Kill 10,000 Specimens.
Quarter Pounder With Ease
Turn 5 Fleshpounds into Giblets.
Dignity for the Dead
Kill 10 Specimens Feeding on Dead Teammates Corpses.
Keep Those Sneakers Off the Floor!
Kill 20 Stalkers with Explosives.
Kill 100 Sirens.
Kill 200 Bloats.
It's What's Inside That Counts
Turn 500 Specimens into Giblets.
Give 1,000 Pounds to Teammates who have 50% of Your Cash or Less.
In Co-op Mode, Use Syringe on Yourself 100 Times.
I Like To Watch
Acquire 5 Minutes of "Zed-Time".
Complete 10 Waves when the Rest of your Team has Died.
Get All of your Perks up to Level 5.
Expensive but delicious! Brought to you by Dr. Dougley and Lord Ned (Buy the £70.000 Potato (Weapon)
Get into GLaDOS' core on Aperture.