Killing Floor

Win a Long Game on Abusement Park on Suicidal Difficulty.

Win Fuel on the first try

Win a Long Game on Bedlam, on Normal Difficulty.

Kill 15 XMas Clots, 5 xmas Stalkers, 5 XMas Crawlers, 1 XMas Siren and 1 XMas Bloat.

Beat Steamland on Hell on Earth Difficulty

Beat Forgotten on Hard Difficulty

Win a Long Game on Farm on Suicidal Difficulty.

Destroy all (15) Snow Globes

Beat Steamland in Objective Mode on Suicidal Difficulty

Beat Forgotten on Suicidal Difficulty

Beat Moonbase on Suicidal Difficulty

Complete a Long Game on all 3 Summer 2009 maps on Suicidal Difficulty.

Beat Ice Cave on Hell on Earth Difficulty

[2013 Summer] Complete the Pop the Clot, the Strong Man and the Grenade Toss games

Push a scrake back with the direct fire from a Hunting Shotgun or alt fire from the Multi-Chamber ZED Thrower

Kill 2 Circus Stalkers with a Melee weapon to the back in one wave.

Beat Steamland on Normal Difficulty

Beat Moonbase on Hard Difficulty

[2010 Xmas] Kill 20 Christmas Clots in one wave.

Unlock 10 of the 13 Christmas Achievements along with any Christmas Map achievement.

Win a Long Game on Wyre, on Suicidal Difficulty.

Kill 2 Scrakes with a Chainsaw in a Single Wave.

Destroy all 30 Cameras

Kill 1 specimen ONLY while expending a full M4 Assault Rifle magazine

Turn 500 Zeds into Giblets using the M79.

Win a Long Game on Offices on Hell on Earth Difficulty.

Beat Forgotten on Normal Difficulty

Kill a zed each with both the Bullpup and FN-Fal

Beat Clandestine on Suicidal Difficulty

Kill 15 Husks with the Husk Cannon

Kill 10 Circus Clots with a Fire-based weapon.

Win a Long Game on Waterworks on Hard Difficulty.

Beat Transit on Suicidal Difficulty

Collect all 16 Z.E.D. Gun pieces

[2010 Xmas] Kill 2 Christmas Gorefasts with a Melee weapon from behind in one wave.

Kill 4 Specimens with a Single Shot from a Hunting Shotgun.

Decapitate a burning Halloween specimen in Bedlam

Beat Transit on Normal Difficulty

Win a Long Game on Farm on Hard Difficulty.

Beat ThrillsChills on Normal Difficulty

Beat ThrillsChills on Hard Difficulty

Beat Hell on Suicidal Difficulty

Win a Long Game on Farm on Normal Difficulty.

Attach the crane hook within 125 seconds

Kill 5 Circus Bloats in one game.

Kill a zed that has injured a player (M7A3 rifle)

Win a Long Game on Icebreaker on Hell on Earth Difficulty.

Win a Long Game on Bedlam on Hell on Earth Difficulty.

Win a Long Game on Bedlam, on Suicidal Difficulty.

[2010 Xmas] Land the killing blow on a Christmas Fleshpound with a Knife.

Beat Fright Yard in Objective Mode on Suicidal Difficulty

Kill 15 Hillbilly Crawlers in 1 game with the Tommy Gun or MKb42

Win a Long Game on Icebreaker on Hard Difficulty.

Beat Transit in Objective Mode on Normal Difficulty

Win a Long Game on Mountain Pass on Normal Difficulty.

Win a Long Game on Departed on Hell on Earth Difficulty.

Beat Hell on Normal Difficulty

Defeat the Patriarch on Suicidal.

[2010 Xmas] Kill 3 Christmas Zeds in 1 ZED time chain with a Melee weapon.

Beat Forgotten on Hell on Earth Difficulty

Win a Long Game on Farm on Hell on Earth Difficulty.

Win a Long Game on Manor on Hell on Earth Difficulty.

Beat Hellride on Suicidal Difficulty

Win a Long Game on Departed on Normal Difficulty.

Win a Long Game on Departed on Suicidal Difficulty.

Win a Long Game on Departed on Hard Difficulty.

Complete all new map achievements on Hell On Earth Difficulty.

Beat Hellride on Hell on Earth Difficulty

Win a Long Game on Foundry on Hell on Earth Difficulty.

Kill 10 Specimens Feeding on Dead Teammates Corpses.

Transit - Get all Objective achievements AND beat KFO Transit on Hard or above to unlock Dr Rachel Clamely.

Win a Long Game on Abusement Park on Hard Difficulty.

Get 25 headshots in a row with the EBR while using the Laser Sight.

Win a Long Game on Manor on Hard Difficulty.

Beat Transit on Hard Difficulty

[2010 Xmas] Get covered in Christmas Bloat Bile and live for 10 seconds on Hard, Suicidal, or Hell on Earth.

Land the killing blow on a Circus Fleshpound with a Pistol.

Win a Long Game on Manor on Suicidal Difficulty.

Kill 100 Specimens.

Kill 10,000 Specimens.

Kill 1,000 Specimens.

Heal yourself plus 5 other players with one grenade

As Demolitions, kill 1000 Specimens with the Pipebomb.

Collect all the bile without a contamination

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

Kill 200 Bloats.

Kill a specimen with every shot from your Revolver for one magazine

[2010 Xmas] Kill 3 Christmas Stalkers with a Lever Action Rifle without reloading.

Set 3 Hillbilly Gorefasts on fire with the Flare Pistol or Trench Gun

Hit a Scrake with the M203 Rifle grenade to kill him

Kill a Halloween Fleshpound and Scrake in the same explosion with the Seal Squeal Harpoon Bomber or the LAW

Beat Transit on Hell on Earth Difficulty

Beat Hillbilly Horror on Hell on Earth Difficulty

Beat Hillbilly Horror on Suicidal Difficulty

As Firebug, kill the Husk with the Flamethrower before he hurts anyone.

Win a Long Game on Abusement Park on Normal Difficulty.

Win a Long Game on Waterworks on Hell on Earth Difficulty.

Beat Fright Yard in Objective Mode on Normal Difficulty

Beat Steamland on Suicidal Difficulty

Complete all new map achievements on Suicidal Difficulty.

Kill one of each type of zed in one round (HSG Shotgun)

Have 5 Breaker Boxes 100% repaired at the same time

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

Beat Fright Yard on Hard Difficulty

Obliterate 10 Zeds at once with the Pipe Bomb.

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

Win a Long Game on Hospital Horrors on Normal Difficulty.

Get all 3 gold bars without the carriers taking damage while they have them

Get into GLaDOS' core on Aperture.

Win a Long Game on Mountain Pass on Hard Difficulty.

Beat Clandestine on Normal Difficulty

Win a Long Game on Bedlam, on Hard Difficulty.

Win a Long Game on Santa's Evil Lair on Hell on Earth Difficulty.

Get the 6 Special Halloween Achievements plus 1 Hillbilly Horror Map Achievement to unlock the Grim Reaper

Beat ThrillsChills on Suicidal Difficulty

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

Beat Clandestine on Hell Difficulty

Win a Long Game on Offices on Hard Difficulty.

Win a Long Game on West London on Hard Difficulty.

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

Heal 200 teammates with the MP7's medication dart.

Win a Long Game on West London on Hell on Earth Difficulty.

Beat Moonbase on Normal Difficulty

[2013 Summer] Destroy all the Pukey the Clown dolls

Kill a Scrake, a Fleshpound, and the Patriarch with the Claymore Sword within one map

Beat Hellride on Normal Difficulty

Kill 6 Zeds with one magazine on an MKb42, without reloading

Beat ThrillsChills on Hell Difficulty

Beat Siren's Belch on Normal Difficulty

Kill 100 Sirens.

Kill 25 Burning Specimens with a Crossbow.

Kill 5 Hillbilly Zeds in 10 seconds with the Scythe or Axe

Win a Long Game on Icebreaker on Suicidal Difficulty.

Win a Long Game on Icebreaker on Normal Difficulty.

Aquire 5 Minutes of "Zed-Time".

Heal others for 3000 points of health with the MP5 SMG

Win a Long Game on Santa's Evil Lair on Suicidal Difficulty.

Win a Long Game on Hospital Horrors on Suicidal Difficulty.

Win a Long Game on Aperture on Hell on Earth Difficulty.

Kill 12 zeds with a full magazine from the Combat Shotgun

Cause a Specimen to Die by Luring them into Bloat Acid.

Turn 500 Specimens into Giblets.

Drop 5 different Tier 2 weapons in one wave.

Kill 20 Stalkers with Explosives.

Kill 20 crawlers in mid-air with the M79.

Beat Stronghold on Hell on Earth Difficulty

Beat Hell on Hard Difficulty

Win a Long Game on Biotics Lab on Hard Difficulty.

Win a Long Game on Biotics Lab on Normal Difficulty.

Win a Long Game on Biotics Lab on Suicidal Difficulty.

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

Kill a Circus Husk with a LAW.

Complete a Long Game on all 3 Summer 2009 maps on Normal Difficulty.

Beat Fright Yard on Normal Difficulty

Beat Transit in Objective Mode on Hard Difficulty

Win a Long Game on Manor on Normal Difficulty.

Beat Hell on Hell on Earth Difficulty

Win a Long Game on Offices on Suicidal Difficulty.

Win a Long Game on Foundry, on Suicidal Difficulty.

Beat Siren's Belch on Suicidal Difficulty

As a Medic, Kill 8 Specimens using a Knife in a Single Wave.

Kill 1000 Hillbilly Zeds

[2010 Xmas] Kill the Christmas Patriarch.

Kill the Patriarch when everyone is ONLY using Crossbows.

Beat Siren's Belch on Hard Difficulty

Win a Long Game on Filth's Cross on Hard Difficulty.

Beat Steamland on Hard Difficulty

Kill 10 Halloween zeds in explosions using the Seeker 6 or the M32 within 5 seconds

Win a Long Game on Mountain Pass on Suicidal Difficulty.

Beat Transit in Objective Mode on Hell on Earth Difficulty

Get All of your Perks up to Level 5.

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

Transit - Pick up the door key

Kill 4 Stalkers in a game with the Vlad9000 Nailgun

Win a Long Game on Suburbia on Normal Difficulty.

Transit - Get the Nitro to the Objective in 135 seconds or less

Win a Long Game on Hospital Horrors on Hell on Earth Difficulty.

Win a short round on KF-Hell playing as or with Harchier Spebbington

[2010 Xmas] Kill a Christmas Siren with an undetonated LAW rocket.

Collect all the Beer Steins

Beat Moonbase on Hell on Earth Difficulty

Kill 500 Zeds with the Schneidzekk Medic Gun while you are falling

Beat Ice Cave on Suicidal Difficulty

Win a Long Game on Abusement Park on Hell on Earth Difficulty.

Beat Steamland in Objective Mode on Hard Difficulty

Win a Long Game on Mountain Pass on Hell on Earth Difficulty.

Beat Stronghold on Normal Difficulty

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

Complete all new map achievements on Normal Difficulty.

Win a Long Game on Filth's Cross on Hell on Earth Difficulty.

Complete all new map achievements on Hard Difficulty.

Kill 100 Fleshpounds with the AA12.

Win a Long Game on Waterworks on Suicidal Difficulty.

Beat Stronghold on Suicidal Difficulty

Win a Long Game on Suburbia on Hard Difficulty.

Win a Long Game on West London on Normal Difficulty.

Unlock 10 of the 13 Circus Achievements along with any Abusement Park achievement.

Turn 5 Fleshpounds into Giblets.

Win a Long Game on Wyre, on Hard Difficulty.

Beat Clandestine on Hard Difficulty

Kill 15 Specimens with a Fire Axe in a Single Wave.

Collect all the Treasure Bags

Kill the "Ring Leader" (Circus Patriarch)

Kill a Hillbilly Husk and another Hillbilly Zed in the same shot with the Buzzsaw Bow or M99

[2010 Xmas] Kill a Christmas Crawler with a Crossbow.

Get all 6 achievements and unlock Commando Chicken

Win a Long Game on Filth's Cross on Normal Difficulty.

Kill 1000 Specimens with the SCAR.

Win a Long Game on Aperture on Normal Difficulty.

Transit - Destroy all the DNA vials

Win a Long Game on Biotics Lab on Hell on Earth Difficulty.

Beat Hillbilly Horror on Hard Difficulty

Kill 5 Circus Crawlers with a Bullpup in one wave.

In Co-op Mode, Use Syringe on Yourself 100 Times.

Beat Transit in Objective Mode on Suicidal Difficulty

Beat Fright Yard in Objective Mode on Hell on Earth Difficulty

Win a Long Game on Santa's Evil Lair on Hard Difficulty.

Beat Steamland in Objective Mode on Normal Difficulty

Kill a ZED with a direct (unexploded) shot from the Orca Bomb Propeller or the M-79/M32

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

Clandestine - Destroy 30 skulls

Win a Long Game on Waterworks on Normal Difficulty.

Kill 3 Circus Clots in a wave with the Lever Action Rifle.

Beat Ice Cave on Normal Difficulty

Kill 8 Specimens with One Grenade.

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

Kill The Vampire Patriarch Ringmaster in Bedlam

Kill a Circus Gorefast with a Melee weapon.

Kill 12 clots with one magazine without reloading (MK23)

Beat Stronghold on Hard Difficulty

Win a Long Game on Wyre, on Normal Difficulty.

Beat Ice Cave on Hard Difficulty

Win a Long Game on Foundry, on Hard Difficulty.

Beat Fright Yard on Suicidal Difficulty

Win a Long Game on Aperture on Hard Difficulty.

Kill the Patriarch Before he has a Chance to Heal.

Beat Hellride on Hard Difficulty

Win a Long Game on West London on Suicidal Difficulty.

Complete a Long Game on all 3 Summer 2009 maps on Hard Difficulty.

Win a Long Game on Suburbia on Hell on Earth Difficulty.

Beat Steamland in Objective Mode on Hell on Earth Difficulty

Kill 4 Circus Zeds in 1 ZED time chain with a Melee weapon.

Win a Long Game on Hospital Horrors on Hard Difficulty.

[2010 Xmas] Kill 3 Christmas Bloats with the Bullpup in one wave.

Kill a Circus Scrake with a Crossbow.

Kill 2 scrakes with one shot (M99)

Win a Long Game on Offices on Normal Difficulty.

Complete a Long Game on all 5 Core Maps on Suicidal Difficulty.

Complete a Long Game on all 5 Core Maps on Hard Difficulty.

Deliver the Killing Blow to the Patriarch with a L.A.W. Rocket.

Complete a Long Game on all 5 Core Maps on Normal Difficulty.

Kill 250 Halloween Specimens in Bedlam

Complete 10 Waves when the Rest of your Team has Died.

Beat Hillbilly Horror on Normal Difficulty

Win a Long Game on Aperture on Suicidal Difficulty.

Kill 25 Halloween Scrakes in Bedlam

Win a Long Game on Foundry, on Normal Difficulty.

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

[2010 Xmas] Kill the Christmas Scrake with a Fire-based weapon.

Finish off a Fleshpound using a Melee Attack.

Transit - Kill 250 Zeds before completing the welding objective

Win a Long Game on Filth's Cross on Suicidal Difficulty.

Beat Siren's Belch on Hell on Earth Difficulty

Set a total of 200 Zeds on fire with the Trench Gun in Hillbilly Horror

Kill 5 Halloween Specimens with any gun without reloading

Beat Fright Yard in Objective Mode on Hard Difficulty

Kill 5 zeds in ZED time without reloading with Dr. T's LDS or Bullpup

Expensive but delicious! Brought to you by Dr. Dougley and Lord Ned.

Use Bile or the Flamethrower to kill one of each Halloween Zed

Win a Long Game on Suburbia on Suicidal Difficulty.

Win a Long Game on Santa's Evil Lair on Normal Difficulty.

Win a Long Game on Crash on Suicidal Difficulty.

Win a Long Game on Crash on Hard Difficulty.

Win a Long Game on Crash on Normal Difficulty.

Win a Long Game on Crash on Hell on Earth Difficulty.

Win a Long Game on Biohazard on Hell on Earth Difficulty.

Win a Long Game on Biohazard on Normal Difficulty.

Win a Long Game on Biohazard on Hard Difficulty.

Win a Long Game on Biohazard on Suicidal Difficulty.

Hold dual 9mm, dual hand cannons and Dual Revolvers

Beat Fright Yard on Hell on Earth Difficulty

[2010 Xmas] Kill a Christmas Husk with any Pistol.

Survive 10 seconds after being screamed at by a Circus Siren on Hard or above.

Win a Long Game on Wyre on Hell on Earth Difficulty.

Win a Long Bedlam Match During the Halloween Event on Hard