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285 of 285 (100%) achievements earned:
Personal Achievements
 

Pub Crawl

Win a Long Game on West London on Normal Difficulty.
Unlocked Jan 5, 2012 @ 1:49pm

Lord of the Manor

Win a Long Game on Manor on Normal Difficulty.
Unlocked Jan 2, 2012 @ 8:57am

Lab Cleaner

Win a Long Game on Biotics Lab on Normal Difficulty.
Unlocked Jan 9, 2012 @ 9:25am

Chicken Farmer

Win a Long Game on Farm on Normal Difficulty.
Unlocked Jan 23, 2012 @ 8:48am

The Boss

Win a Long Game on Offices on Normal Difficulty.
Unlocked Jan 23, 2012 @ 4:00am

The Long War

Complete a Long Game on all 5 Core Maps on Normal Difficulty.
Unlocked Jan 23, 2012 @ 8:48am

Experimenticenticide

Kill 100 Specimens.
Unlocked Jan 1, 2012 @ 5:44pm

Fascist Dietitian

Kill 200 Bloats.
Unlocked Jan 10, 2012 @ 2:01pm

Homer's Heroes

Kill 100 Sirens.
Unlocked Jan 11, 2012 @ 3:57am

Keep Those Sneakers Off the Floor!

Kill 20 Stalkers with Explosives.
Unlocked Jan 11, 2012 @ 1:03pm

Random Axe of Kindness

Kill 15 Specimens with a Fire Axe in a Single Wave.
Unlocked Jan 15, 2012 @ 2:16am

Bitter Irony

Kill 2 Scrakes with a Chainsaw in a Single Wave.
Unlocked Feb 24, 2012 @ 4:16am

Hot Cross Fun

Kill 25 Burning Specimens with a Crossbow.
Unlocked Jan 9, 2012 @ 5:29am

Dignity for the Dead

Kill 10 Specimens Feeding on Dead Teammates Corpses.
Unlocked Dec 14, 2012 @ 1:41pm

Social Outburst

Kill 8 Specimens with One Grenade.
Unlocked Jan 1, 2012 @ 5:01pm

Careful Spender

Kill 4 Specimens with a Single Shot from a Hunting Shotgun.
Unlocked Jan 15, 2012 @ 3:35am

It's Not Easy Being Greasy

Cause a Specimen to Die by Luring them into Bloat Acid.
Unlocked Jan 1, 2012 @ 5:28pm

Too Close For Comfort

Finish off a Fleshpound using a Melee Attack.
Unlocked Jan 29, 2012 @ 4:09am

Master Surgeon

As a Medic, Kill 8 Specimens using a Knife in a Single Wave.
Unlocked Jan 16, 2012 @ 3:03pm

It's What's Inside That Counts

Turn 500 Specimens into Giblets.
Unlocked Jan 12, 2012 @ 5:46pm

Quarter Pounder With Ease

Turn 5 Fleshpounds into Giblets.
Unlocked Jan 12, 2012 @ 5:22pm

Self Medicator

In Co-op Mode, Use Syringe on Yourself 100 Times.
Unlocked Jan 6, 2012 @ 7:26am

Thin-Ice Pirouette

Complete 10 Waves when the Rest of your Team has Died.
Unlocked Jan 27, 2012 @ 7:17am

Philanthropist

Give 1,000 Pounds to Teammates who have 50% of Your Cash or Less.
Unlocked Jan 8, 2012 @ 12:30pm

I Like To Watch

Aquire 5 Minutes of "Zed-Time".
Unlocked Jan 5, 2012 @ 9:00am

Mr. Perky

Get All of your Perks up to Level 5.
Unlocked Mar 27, 2012 @ 9:16am

Straight Rush

Kill the Patriarch Before he has a Chance to Heal.
Unlocked Jan 13, 2012 @ 8:21am

The L.A.W. That Broke The Camel's Back

Deliver the Killing Blow to the Patriarch with a L.A.W. Rocket.
Unlocked Jan 10, 2012 @ 12:22pm

Death To The Mad Scientist

Defeat the Patriarch on Suicidal.
Unlocked Jan 24, 2012 @ 7:40am

Experimentimillicide

Kill 1,000 Specimens.
Unlocked Jan 5, 2012 @ 10:07am

Experimentilottacide

Kill 10,000 Specimens.
Unlocked Jan 14, 2012 @ 4:08am

Hard Pub Crawl

Win a Long Game on West London on Hard Difficulty.
Unlocked Jan 10, 2012 @ 12:22pm

Duke of the Manor

Win a Long Game on Manor on Hard Difficulty.
Unlocked Jan 15, 2012 @ 4:17pm

Cattle Farmer

Win a Long Game on Farm on Hard Difficulty.
Unlocked Jan 13, 2012 @ 11:35am

Hard Boss

Win a Long Game on Offices on Hard Difficulty.
Unlocked Feb 5, 2012 @ 8:09am

Lab Assistant

Win a Long Game on Biotics Lab on Hard Difficulty.
Unlocked Jan 10, 2012 @ 9:36am

The Hard War

Complete a Long Game on all 5 Core Maps on Hard Difficulty.
Unlocked Feb 5, 2012 @ 8:09am

Suicidal Pub Crawl

Win a Long Game on West London on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 8:43am

Emperor of the Manor

Win a Long Game on Manor on Suicidal Difficulty.
Unlocked Feb 1, 2012 @ 3:10am

Alligator Farmer

Win a Long Game on Farm on Suicidal Difficulty.
Unlocked Feb 9, 2012 @ 4:43pm

Mad Boss

Win a Long Game on Offices on Suicidal Difficulty.
Unlocked Feb 8, 2012 @ 2:09pm

Lab Professor

Win a Long Game on Biotics Lab on Suicidal Difficulty.
Unlocked Jan 29, 2012 @ 10:20am

The Completely Suicidal War

Complete a Long Game on all 5 Core Maps on Suicidal Difficulty.
Unlocked Feb 9, 2012 @ 4:44pm

Tin Man

Win a Long Game on Foundry, on Normal Difficulty.
Unlocked Feb 4, 2012 @ 5:48am

Steel Worker

Win a Long Game on Foundry, on Hard Difficulty.
Unlocked Jan 14, 2012 @ 1:33pm

Man of Steel

Win a Long Game on Foundry, on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 3:02pm

A Bit Barmy

Win a Long Game on Bedlam, on Normal Difficulty.
Unlocked Feb 4, 2012 @ 6:32am

Gone Mental

Win a Long Game on Bedlam, on Hard Difficulty.
Unlocked Feb 5, 2012 @ 8:33am

Complete Barking

Win a Long Game on Bedlam, on Suicidal Difficulty.
Unlocked Feb 5, 2012 @ 2:50pm

Squirrel King of the Dark Forest

Win a Long Game on Wyre, on Normal Difficulty.
Unlocked Feb 4, 2012 @ 7:59am

Raccoon King of the Dark Forest

Win a Long Game on Wyre, on Hard Difficulty.
Unlocked Feb 5, 2012 @ 7:04am

Bear King of the Dark Forest

Win a Long Game on Wyre, on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 5:45am

Long, Hot Summer

Complete a Long Game on all 3 Summer 2009 maps on Normal Difficulty.
Unlocked Feb 4, 2012 @ 7:59am

Summer of 2009

Complete a Long Game on all 3 Summer 2009 maps on Hard Difficulty.
Unlocked Feb 5, 2012 @ 8:33am

And Back to School

Complete a Long Game on all 3 Summer 2009 maps on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 3:02pm

Explosive Personality

As Demolitions, kill 1000 Specimens with the Pipebomb.
Unlocked Nov 10, 2012 @ 10:43am

Flaming Hell, That was Close

As Firebug, kill the Husk with the Flamethrower before he hurts anyone.
Unlocked Feb 14, 2012 @ 7:42am

Merry Men

Kill the Patriarch when everyone is ONLY using Crossbows.
Unlocked Jan 29, 2012 @ 3:30am

Blooper Reel

Turn 500 Zeds into Giblets using the M79.
Unlocked Jan 28, 2012 @ 5:54am

Dot of Doom

Get 25 headshots in a row with the EBR while using the Laser Sight.
Unlocked Jan 28, 2012 @ 4:05am

SCAR'd

Kill 1000 Specimens with the SCAR.
Unlocked Feb 15, 2012 @ 3:46am

Healing Touch

Heal 200 teammates with the MP7's medication dart.
Unlocked Jan 16, 2012 @ 3:50am

Pound This

Kill 100 Fleshpounds with the AA12.
Unlocked Feb 23, 2012 @ 5:41am

Killer Junior

Kill 20 crawlers in mid-air with the M79.
Unlocked Jan 13, 2012 @ 11:10am

Getting Chunky

Obliterate 10 Zeds at once with the Pipe Bomb.
Unlocked Jan 12, 2012 @ 4:46pm

Hellish Pub Crawl

Win a Long Game on West London on Hell on Earth Difficulty.
Unlocked Feb 24, 2012 @ 7:57am

Demonic King of the Manor

Win a Long Game on Manor on Hell on Earth Difficulty.
Unlocked Feb 25, 2012 @ 12:59pm

Demon Farmer

Win a Long Game on Farm on Hell on Earth Difficulty.
Unlocked Feb 26, 2012 @ 2:20pm

Boss from Hell

Win a Long Game on Offices on Hell on Earth Difficulty.
Unlocked Feb 23, 2012 @ 3:05pm

Scientist from Hell

Win a Long Game on Biotics Lab on Hell on Earth Difficulty.
Unlocked Feb 22, 2012 @ 8:46am

Diablo Steel Man

Win a Long Game on Foundry on Hell on Earth Difficulty.
Unlocked Mar 1, 2012 @ 1:37pm

Commit-ed for life

Win a Long Game on Bedlam on Hell on Earth Difficulty.
Unlocked Feb 20, 2012 @ 1:49pm

Wolf King of the Dark Forest

Win a Long Game on Wyre on Hell on Earth Difficulty.
Unlocked Mar 8, 2012 @ 12:51pm

Waste Disposal

Win a Long Game on Biohazard on Normal Difficulty.
Unlocked Feb 4, 2012 @ 2:27pm

Waste Land

Win a Long Game on Biohazard on Hard Difficulty.
Unlocked Jan 29, 2012 @ 12:46pm

Waste of Space

Win a Long Game on Biohazard on Suicidal Difficulty.
Unlocked Feb 5, 2012 @ 2:52am

Wasted

Win a Long Game on Biohazard on Hell on Earth Difficulty.
Unlocked Feb 25, 2012 @ 9:43am

Warehouse Janitor

Win a Long Game on Crash on Normal Difficulty.
Unlocked Jan 29, 2012 @ 5:58am

Warehouse Forklift Operator

Win a Long Game on Crash on Hard Difficulty.
Unlocked Feb 6, 2012 @ 6:09am

Warehouse Foreman

Win a Long Game on Crash on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 1:05am

Warehouse Manager

Win a Long Game on Crash on Hell on Earth Difficulty.
Unlocked Feb 22, 2012 @ 1:32pm

Departure Gallery

Win a Long Game on Departed on Normal Difficulty.
Unlocked Jan 29, 2012 @ 6:50am

Departure Lounge

Win a Long Game on Departed on Hard Difficulty.
Unlocked Jan 16, 2012 @ 7:52am

Departure Gate

Win a Long Game on Departed on Suicidal Difficulty.
Unlocked Jan 29, 2012 @ 11:24am

Dear Departed

Win a Long Game on Departed on Hell on Earth Difficulty.
Unlocked Feb 22, 2012 @ 2:41pm

Running Late

Win a Long Game on Filth's Cross on Normal Difficulty.
Unlocked Feb 5, 2012 @ 5:16am

Missed Connection

Win a Long Game on Filth's Cross on Hard Difficulty.
Unlocked Jan 28, 2012 @ 6:52am

Train Wreck

Win a Long Game on Filth's Cross on Suicidal Difficulty.
Unlocked Feb 8, 2012 @ 1:03pm

Pile Up

Win a Long Game on Filth's Cross on Hell on Earth Difficulty.
Unlocked Feb 26, 2012 @ 10:46am

Gimme a Plaster!

Win a Long Game on Hospital Horrors on Normal Difficulty.
Unlocked Jan 24, 2012 @ 12:52pm

That Bloody Well Hurts!

Win a Long Game on Hospital Horrors on Hard Difficulty.
Unlocked Feb 8, 2012 @ 9:55am

I'm Dying Here!

Win a Long Game on Hospital Horrors on Suicidal Difficulty.
Unlocked Feb 9, 2012 @ 3:14pm

Not Dead Yet!

Win a Long Game on Hospital Horrors on Hell on Earth Difficulty.
Unlocked Feb 25, 2012 @ 1:16pm

Ice Cube

Win a Long Game on Icebreaker on Normal Difficulty.
Unlocked Feb 5, 2012 @ 6:14am

Crushed Ice

Win a Long Game on Icebreaker on Hard Difficulty.
Unlocked Feb 4, 2012 @ 3:36am

Iceberg

Win a Long Game on Icebreaker on Suicidal Difficulty.
Unlocked Feb 12, 2012 @ 5:14pm

Comet

Win a Long Game on Icebreaker on Hell on Earth Difficulty.
Unlocked Jan 24, 2012 @ 7:41am

Daytrip

Win a Long Game on Mountain Pass on Normal Difficulty.
Unlocked Jan 5, 2012 @ 9:06am

Gone Camping

Win a Long Game on Mountain Pass on Hard Difficulty.
Unlocked Jan 18, 2012 @ 12:21pm

Mountaineer

Win a Long Game on Mountain Pass on Suicidal Difficulty.
Unlocked Feb 12, 2012 @ 3:39pm

Park Ranger

Win a Long Game on Mountain Pass on Hell on Earth Difficulty.
Unlocked Feb 24, 2012 @ 5:37pm

Neighborhood Watch

Win a Long Game on Suburbia on Normal Difficulty.
Unlocked Feb 4, 2012 @ 3:10pm

Private Security

Win a Long Game on Suburbia on Hard Difficulty.
Unlocked Feb 6, 2012 @ 5:02am

Vigilante

Win a Long Game on Suburbia on Suicidal Difficulty.
Unlocked Feb 5, 2012 @ 11:13am

SWAT

Win a Long Game on Suburbia on Hell on Earth Difficulty.
Unlocked Mar 1, 2012 @ 2:44pm

Slight Drip

Win a Long Game on Waterworks on Normal Difficulty.
Unlocked Jan 29, 2012 @ 5:48am

Burst Pipe

Win a Long Game on Waterworks on Hard Difficulty.
Unlocked Jan 27, 2012 @ 7:08am

Pressure Failure

Win a Long Game on Waterworks on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 12:34pm

Floodgate to Hell

Win a Long Game on Waterworks on Hell on Earth Difficulty.
Unlocked Feb 27, 2012 @ 1:10pm

Piece of Cake

Complete all new map achievements on Normal Difficulty.
Unlocked Feb 5, 2012 @ 6:14am

Pound Cake

Complete all new map achievements on Hard Difficulty.
Unlocked Feb 8, 2012 @ 9:55am

Fruit Cake

Complete all new map achievements on Suicidal Difficulty.
Unlocked Feb 12, 2012 @ 5:15pm

Devil Cake

Complete all new map achievements on Hell On Earth Difficulty.
Unlocked Mar 8, 2012 @ 12:51pm

Let Them Burn

Get 1000 points of burn damage with the MAC-10.
Unlocked Jan 12, 2012 @ 2:52pm

Walking in A Winter Horror Land

Win a Long Game on Santa's Evil Lair on Normal Difficulty.
Unlocked Jan 23, 2012 @ 4:49am

Silent Night, Evil Night

Win a Long Game on Santa's Evil Lair on Hard Difficulty.
Unlocked Feb 6, 2012 @ 3:24am

I'm Dreaming of a Red Christmas

Win a Long Game on Santa's Evil Lair on Suicidal Difficulty.
Unlocked Feb 5, 2012 @ 10:03am

Grandma got Eaten by a Reindeer

Win a Long Game on Santa's Evil Lair on Hell on Earth Difficulty.
Unlocked Feb 24, 2012 @ 12:30pm

Merry Friggin Christmas

[2010 Xmas] Kill the Christmas Patriarch.
Unlocked Jan 2, 2012 @ 8:57am

Cracked the Nutcracker!

[2010 Xmas] Land the killing blow on a Christmas Fleshpound with a Knife.
Unlocked Dec 9, 2012 @ 8:25am

Can't Catch Me!

[2010 Xmas] Kill 2 Christmas Gorefasts with a Melee weapon from behind in one wave.
Unlocked Dec 14, 2012 @ 10:10am

Toasted Jack Frost

[2010 Xmas] Kill the Christmas Scrake with a Fire-based weapon.
Unlocked Dec 14, 2012 @ 10:34am

That's not Santa!

[2010 Xmas] Kill 3 Christmas Bloats with the Bullpup in one wave.
Unlocked Dec 9, 2012 @ 8:22am

Rudolph, the Bloody Nosed Reindeer

[2010 Xmas] Kill a Christmas Crawler with a Crossbow.
Unlocked Jan 2, 2012 @ 9:19am

Not So Silent Night

[2010 Xmas] Kill a Christmas Siren with an undetonated LAW rocket.
Unlocked Dec 9, 2012 @ 8:53am

Fending off Mrs. Claws

[2010 Xmas] Kill 3 Christmas Stalkers with a Lever Action Rifle without reloading.
Unlocked Jan 6, 2012 @ 7:25am

Who Brings a Gun to a Snow Ball Fight?

[2010 Xmas] Kill a Christmas Husk with any Pistol.
Unlocked Jan 2, 2012 @ 8:23am

Deck the Halls with Buckets o' Blood

[2010 Xmas] Kill 3 Christmas Zeds in 1 ZED time chain with a Melee weapon.
Unlocked Dec 9, 2012 @ 8:32am

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).
Unlocked Dec 14, 2012 @ 10:32am

Eggnog Anyone?

[2010 Xmas] Get covered in Christmas Bloat Bile and live for 10 seconds on Hard, Suicidal, or Hell on Earth.
Unlocked Jan 5, 2012 @ 3:03pm

Bad Santa

Unlock 10 of the 13 Christmas Achievements along with any Christmas Map achievement.
Unlocked Dec 14, 2012 @ 10:28am

Back to Work

[2010 Xmas] Kill 20 Christmas Clots in one wave.
Unlocked Dec 14, 2012 @ 11:30am

Uber Tuber

Expensive but delicious! Brought to you by Dr. Dougley and Lord Ned.
Unlocked Jun 13, 2012 @ 6:50am

Science Got Done

Win a Long Game on Aperture on Normal Difficulty.
Unlocked Feb 4, 2012 @ 1:52pm

Still Alive

Win a Long Game on Aperture on Hard Difficulty.
Unlocked Feb 7, 2012 @ 3:42am

This is a Triumph

Win a Long Game on Aperture on Suicidal Difficulty.
Unlocked Feb 5, 2012 @ 4:38am

I'm Making a Note Here, Huge Success

Win a Long Game on Aperture on Hell on Earth Difficulty.
Unlocked Feb 21, 2012 @ 1:58pm

Golden Potato

Get into GLaDOS' core on Aperture.
Unlocked Jun 13, 2012 @ 4:18am

Flea Circus

Win a Long Game on Abusement Park on Normal Difficulty.
Unlocked Jan 23, 2012 @ 8:00am

Dog and Pony Show

Win a Long Game on Abusement Park on Hard Difficulty.
Unlocked Feb 7, 2012 @ 4:30am

3 Ring Circus

Win a Long Game on Abusement Park on Suicidal Difficulty.
Unlocked Feb 7, 2012 @ 1:53pm

On Top of the Big Top

Win a Long Game on Abusement Park on Hell on Earth Difficulty.
Unlocked Mar 8, 2012 @ 1:45pm

Ringmaster

Kill the "Ring Leader" (Circus Patriarch)
Unlocked Jul 7, 2012 @ 5:57am

Sparring with a Master

Kill a Circus Gorefast with a Melee weapon.
Unlocked Jul 6, 2012 @ 4:23am

Assistant Homicide

Kill 2 Circus Stalkers with a Melee weapon to the back in one wave.
Unlocked Jul 8, 2012 @ 4:26am

Seeing Double

Kill 5 Circus Crawlers with a Bullpup in one wave.
Unlocked Jul 7, 2012 @ 6:08am

Clearing Clown Alley

Kill 5 Circus Bloats in one game.
Unlocked Jul 7, 2012 @ 6:13am

The Big Hunt

Kill a Circus Scrake with a Crossbow.
Unlocked Jul 7, 2012 @ 6:44am

Lifting a Dumbell

Kill a Circus Husk with a LAW.
Unlocked Jul 7, 2012 @ 6:27am

Small Hands

Kill 3 Circus Clots in a wave with the Lever Action Rifle.
Unlocked Jul 6, 2012 @ 4:33am

Elephant Gun

Land the killing blow on a Circus Fleshpound with a Pistol.
Unlocked Jul 8, 2012 @ 4:44am

Juggling Act

Drop 5 different Tier 2 weapons in one wave.
Unlocked Jul 7, 2012 @ 6:25am

Windjammer Enthusiast

Survive 10 seconds after being screamed at by a Circus Siren on Hard or above.
Unlocked Jul 7, 2012 @ 6:33am

Taking Down the Big Top

Kill 4 Circus Zeds in 1 ZED time chain with a Melee weapon.
Unlocked Jul 6, 2012 @ 4:25am

Burning up the Midway

Kill 10 Circus Clots with a Fire-based weapon.
Unlocked Jul 7, 2012 @ 6:40am

Punk'd

Unlock 10 of the 13 Circus Achievements along with any Abusement Park achievement.
Unlocked Jul 7, 2012 @ 6:40am

Sparkling in the Twilight

Kill The Vampire Patriarch Ringmaster in Bedlam
Unlocked Nov 3, 2012 @ 6:14am

Carving The Jack O' Lantern

Decapitate a burning Halloween specimen in Bedlam
Unlocked Nov 3, 2012 @ 5:12am

The Scene is Zed

Kill 250 Halloween Specimens in Bedlam
Unlocked Nov 3, 2012 @ 5:37am

Zed October

Win a Long Bedlam Match During the Halloween Event on Hard
Unlocked Nov 3, 2012 @ 6:14am

This is No Ordinary Rabbit!

Kill 25 Halloween Scrakes in Bedlam
Unlocked Nov 3, 2012 @ 6:37am

Trick, not Treat

Kill 5 Halloween Specimens with any gun without reloading
Unlocked Nov 3, 2012 @ 5:12am

Rule The Roost

Get all 6 achievements and unlock Commando Chicken
Unlocked Nov 3, 2012 @ 7:08am

Burning Irony

Kill 15 Husks with the Husk Cannon
Unlocked Dec 14, 2012 @ 9:55am

Highlander

Kill a Scrake, a Fleshpound, and the Patriarch with the Claymore Sword within one map
Unlocked Dec 14, 2012 @ 10:16am

Bloody Yanks

Kill 1 specimen ONLY while expending a full M4 Assault Rifle magazine
Unlocked Jan 27, 2012 @ 10:44am

Finish Him

Hit a Scrake with the M203 Rifle grenade to kill him
Unlocked Dec 14, 2012 @ 10:12am

I love ze Healing not ze Hurting

Heal others for 3000 points of health with the MP5 SMG
Unlocked Jan 13, 2012 @ 11:21am

Italian Meat Pasta

Kill 12 zeds with a full magazine from the Combat Shotgun
Unlocked Feb 1, 2012 @ 9:09am

Feeling Lucky?

Kill a specimen with every shot from your Revolver for one magazine
Unlocked Feb 17, 2012 @ 12:33pm

We Have Ourselves a Cowboy

Hold dual 9mm, dual hand cannons and Dual Revolvers
Unlocked Feb 23, 2012 @ 3:38pm

Snow Cone

Beat Ice Cave on Normal Difficulty
Unlocked Feb 4, 2012 @ 3:40pm

Stay Frosty

Beat Ice Cave on Hard Difficulty
Unlocked Feb 6, 2012 @ 2:35am

On the Rocks

Beat Ice Cave on Suicidal Difficulty
Unlocked Feb 20, 2012 @ 4:55am

Anti Freeze

Beat Ice Cave on Hell on Earth Difficulty
Unlocked Feb 24, 2012 @ 4:16pm

A Bloody Christmas Carol

Kill 15 XMas Clots, 5 xmas Stalkers, 5 XMas Crawlers, 1 XMas Siren and 1 XMas Bloat.
Unlocked Jan 5, 2012 @ 4:14am

Spec Ops

Kill 12 clots with one magazine without reloading (MK23)
Unlocked Jul 6, 2012 @ 4:30am

Combat Medic

Kill a zed that has injured a player (M7A3 rifle)
Unlocked Jul 7, 2012 @ 5:32am

Fugly

Kill one of each type of zed in one round (HSG Shotgun)
Unlocked Jul 7, 2012 @ 11:51am

British Superiority

Kill a zed each with both the Bullpup and FN-Fal
Unlocked Jul 7, 2012 @ 5:35am

The Big One

Kill 2 scrakes with one shot (M99)
Unlocked Jul 8, 2012 @ 5:02am

Highway to Heaven

Beat Hellride on Normal Difficulty
Unlocked Jul 7, 2012 @ 5:57am

Stuck in Limbo

Beat Hellride on Hard Difficulty
Unlocked Jul 13, 2012 @ 1:14pm

Demonic Road

Beat Hellride on Suicidal Difficulty
Unlocked Jul 13, 2012 @ 9:47am

Devil's Co-pilot

Beat Hellride on Hell on Earth Difficulty
Unlocked Jul 14, 2012 @ 1:41pm

Historical Remnants

Kill 6 Zeds with one magazine on an MKb42, without reloading
Unlocked Oct 27, 2012 @ 1:56am

Nail'd!

Kill 4 Stalkers in a game with the Vlad9000 Nailgun
Unlocked Oct 27, 2012 @ 2:13am

Explosion of Love

Heal yourself plus 5 other players with one grenade
Unlocked Oct 27, 2012 @ 1:29pm

Trench Warfare

Set a total of 200 Zeds on fire with the Trench Gun in Hillbilly Horror
Unlocked Oct 29, 2012 @ 11:39am

Third Cousins

Beat Hillbilly Horror on Normal Difficulty
Unlocked Oct 28, 2012 @ 2:52am

Second Cousins

Beat Hillbilly Horror on Hard Difficulty
Unlocked Oct 29, 2012 @ 12:22pm

First Cousins (Once Removed)

Beat Hillbilly Horror on Suicidal Difficulty
Unlocked Oct 27, 2012 @ 1:06pm

First Cousins

Beat Hillbilly Horror on Hell on Earth Difficulty
Unlocked Oct 28, 2012 @ 6:44am

Grim Reaper

Get the 6 Special Halloween Achievements plus 1 Hillbilly Horror Map Achievement to unlock the Grim Reaper
Unlocked Oct 27, 2012 @ 1:07pm

Soul Collector

Free the souls of the 25 Gnomes hidden on Hillbilly Horror in 1 game
Unlocked Oct 26, 2012 @ 3:44pm

Meet Your Maker!

Kill 1000 Hillbilly Zeds
Unlocked Oct 27, 2012 @ 2:25am

Creepy Crawlies

Kill 15 Hillbilly Crawlers in 1 game with the Tommy Gun or MKb42
Unlocked Oct 27, 2012 @ 1:59am

Rippin' It Up

Kill a Hillbilly Husk and another Hillbilly Zed in the same shot with the Buzzsaw Bow or M99
Unlocked Oct 27, 2012 @ 2:15am

I Am Become Death

Kill 5 Hillbilly Zeds in 10 seconds with the Scythe or Axe
Unlocked Oct 27, 2012 @ 2:21am

Fiery Personality

Set 3 Hillbilly Gorefasts on fire with the Flare Pistol or Trench Gun
Unlocked Oct 27, 2012 @ 2:07am

Have my axe

Kill 30 Fleshpounds with the Dwarfs!? axe with back attacks
Unlocked Dec 14, 2012 @ 10:08am

One Small Step for Man

Kill 500 Zeds with the Schneidzekk Medic Gun while you are falling
Unlocked Dec 14, 2012 @ 1:51pm

But It's All Red!

Collect all 16 Z.E.D. Gun pieces
Unlocked Dec 14, 2012 @ 11:45am

Game Over, Man!

Have 20 Zeds you slowed with the Z.E.D. gun killed
Unlocked Dec 14, 2012 @ 10:37am

Here is to us

Beat Moonbase on Normal Difficulty
Unlocked Dec 14, 2012 @ 11:56am

Attempting Re-entry

Beat Moonbase on Hard Difficulty
Unlocked Dec 14, 2012 @ 12:11pm

Amusing Death

Beat Moonbase on Suicidal Difficulty
Unlocked Dec 14, 2012 @ 9:49am

One Giant Leap (Back) for Mankind

Beat Moonbase on Hell on Earth Difficulty
Unlocked Dec 14, 2012 @ 1:07pm

Gimli That Axe!

Get the Not-a-war-hammer Achievement in Dwarfs!?
Unlocked Dec 14, 2012 @ 11:18am

Astro Buffer Afficiando

Beat Steamland on Normal Difficulty
Unlocked Jul 3, 2013 @ 2:03pm

Modified Psychoacceleration Achiever

Beat Steamland on Hard Difficulty
Unlocked Jul 4, 2013 @ 12:53am

Fractional Neutron Activator

Beat Steamland on Suicidal Difficulty
Unlocked Jul 4, 2013 @ 8:41am

Advanced Omega Wave Resonance Explorer

Beat Steamland on Hell on Earth Difficulty
Unlocked Jul 3, 2013 @ 2:38pm

Simplified Force Adhesion Afficianado

Beat Steamland in Objective Mode on Normal Difficulty
Unlocked Jul 3, 2013 @ 10:50am

Oscillating Hydrogen Transition Achiever

Beat Steamland in Objective Mode on Hard Difficulty
Unlocked Jul 4, 2013 @ 1:35am

Alpha Wave Osteooxidation Activator

Beat Steamland in Objective Mode on Suicidal Difficulty
Unlocked Jul 4, 2013 @ 2:20am

Tachyon Cytoneutralization Explorer

Beat Steamland in Objective Mode on Hell on Earth Difficulty
Unlocked Jul 4, 2013 @ 8:09am

Hide and go Puke

[2013 Summer] Destroy all the Pukey the Clown dolls
Unlocked Jul 3, 2013 @ 1:45pm

Arcade Gamer

[2013 Summer] Complete the Pop the Clot, the Strong Man and the Grenade Toss games
Unlocked Jul 3, 2013 @ 12:12pm

Full Charge

Have 5 Breaker Boxes 100% repaired at the same time
Unlocked Jul 3, 2013 @ 11:12am

Extended Motion Protector

[2013 Summer] Protect the Ringmaster during the escort mission so that he does not get hit more than 15 times
Unlocked Jul 4, 2013 @ 1:04am

Guardian Assault Protector

Protect the ringmaster during the defense mission so that he does not get hit more than 15 times
Unlocked Jul 3, 2013 @ 10:43am

Golden 3 Crown Note

Get all 3 gold bars without the carriers taking damage while they have them
Unlocked Jul 3, 2013 @ 10:48am

Single-shot Equalizer

Kill 4 different types of Zeds with headshots with 4 shots from the Long Musket or the M14 without reloading
Unlocked Jul 3, 2013 @ 1:59pm

Assault Flayer Ordinance

Push a scrake back with the direct fire from a Hunting Shotgun or alt fire from the Multi-Chamber ZED Thrower
Unlocked Jul 3, 2013 @ 10:46am

Single-Load Doom Bombardier

Kill a ZED with a direct (unexploded) shot from the Orca Bomb Propeller or the M-79/M32
Unlocked Jul 4, 2013 @ 1:07am

Turbo Executioner

Kill 5 zeds in ZED time without reloading with Dr. T's LDS or Bullpup
Unlocked Jul 4, 2013 @ 12:39am

Mrs. Punkd

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
Unlocked Jul 4, 2013 @ 12:49am

Longshoreman

Beat Fright Yard on Normal Difficulty
Unlocked Oct 24, 2013 @ 4:08am

Gang Crew

Beat Fright Yard on Hard Difficulty
Unlocked Oct 24, 2013 @ 9:39am

Stevedore

Beat Fright Yard on Suicidal Difficulty
Unlocked Oct 27, 2013 @ 4:48am

Wharfinger

Beat Fright Yard on Hell on Earth Difficulty
Unlocked Oct 26, 2013 @ 1:56pm

Fork Lift Operator

Beat Fright Yard in Objective Mode on Normal Difficulty
Unlocked Oct 24, 2013 @ 7:53pm

Truck Driver

Beat Fright Yard in Objective Mode on Hard Difficulty
Unlocked Oct 24, 2013 @ 2:21pm

Crane Operator

Beat Fright Yard in Objective Mode on Suicidal Difficulty
Unlocked Oct 26, 2013 @ 7:34am

Shipping Magnate

Beat Fright Yard in Objective Mode on Hell on Earth Difficulty
Unlocked Oct 26, 2013 @ 1:10pm

Claw Machine Master

Attach the crane hook within 125 seconds
Unlocked Oct 26, 2013 @ 10:04am

Ex-scientist

Collect all the bile without a contamination
Unlocked Oct 24, 2013 @ 8:05am

777

Win Fuel on the first try
Unlocked Oct 27, 2013 @ 5:42am

Blinding Big Brother

Destroy all 30 Cameras
Unlocked Oct 24, 2013 @ 10:18am

Fire and Forget

Kill a Halloween Fleshpound and Scrake in the same explosion with the Seal Squeal Harpoon Bomber or the LAW
Unlocked Oct 24, 2013 @ 9:41am

Under The Weather

Use Bile or the Flamethrower to kill one of each Halloween Zed
Unlocked Oct 24, 2013 @ 4:19am

Most Bang for the Buck

Kill 10 Halloween zeds in explosions using the Seeker 6 or the M32 within 5 seconds
Unlocked Oct 24, 2013 @ 3:53am

Death

Beat Hell on Normal Difficulty
Unlocked Dec 18, 2013 @ 5:11am

King Minos

Beat Hell on Hard Difficulty
Unlocked Dec 18, 2013 @ 4:55am

Cerberus

Beat Hell on Suicidal Difficulty
Unlocked Dec 8, 2013 @ 1:10pm

Lucifer

Beat Hell on Hell on Earth Difficulty
Unlocked Dec 7, 2013 @ 6:15am

Brain Fart

Beat Forgotten on Normal Difficulty
Unlocked Dec 18, 2013 @ 5:23am

Agnosia

Beat Forgotten on Hard Difficulty
Unlocked Dec 18, 2013 @ 7:53am

Amnesia

Beat Forgotten on Suicidal Difficulty
Unlocked Dec 18, 2013 @ 7:40am

Dementia

Beat Forgotten on Hell on Earth Difficulty
Unlocked Dec 7, 2013 @ 7:12am

No Time for Love, Dr. Jones

Win a short round on KF-Hell playing as or with Harchier Spebbington
Unlocked Dec 8, 2013 @ 1:10pm

Home Brewer

Beat Siren's Belch on Normal Difficulty
Unlocked Jul 2, 2014 @ 11:07pm

Micro Brewer

Beat Siren's Belch on Hard Difficulty
Unlocked Jul 2, 2014 @ 11:21pm

Master Brewer

Beat Siren's Belch on Suicidal Difficulty
Unlocked Jul 2, 2014 @ 11:42pm

Trappist Monk

Beat Siren's Belch on Hell on Earth Difficulty
Unlocked Jul 3, 2014 @ 1:48pm

Oktoberfest Master

Collect all the Beer Steins
Unlocked Jul 3, 2014 @ 1:13am

Peasant

Beat Stronghold on Normal Difficulty
Unlocked Jul 3, 2014 @ 12:06am

Squire

Beat Stronghold on Hard Difficulty
Unlocked Jul 3, 2014 @ 12:33am

Prince

Beat Stronghold on Suicidal Difficulty
Unlocked Jul 5, 2014 @ 4:06am

King

Beat Stronghold on Hell on Earth Difficulty
Unlocked Jul 5, 2014 @ 10:33am

Rich Evil Uncle

Collect all the Treasure Bags
Unlocked Jul 3, 2014 @ 12:43pm

Cattle Class

Beat Transit on Normal Difficulty
Unlocked Jul 3, 2014 @ 4:08am

Economy Comfort

Beat Transit on Hard Difficulty
Unlocked Jul 3, 2014 @ 8:22am

Business Class

Beat Transit on Suicidal Difficulty
Unlocked Jul 3, 2014 @ 8:34am

First Class

Beat Transit on Hell on Earth Difficulty
Unlocked Jul 3, 2014 @ 8:55am

Day-trip

Beat Transit in Objective Mode on Normal Difficulty
Unlocked Jul 3, 2014 @ 9:41am

Long weekend

Beat Transit in Objective Mode on Hard Difficulty
Unlocked Jul 3, 2014 @ 2:15pm

Serious vacation

Beat Transit in Objective Mode on Suicidal Difficulty
Unlocked Jul 4, 2014 @ 1:51pm

Moved to Paris!

Beat Transit in Objective Mode on Hell on Earth Difficulty
Unlocked Jul 6, 2014 @ 3:15am

Nitro Boost!

Transit - Get the Nitro to the Objective in 135 seconds or less
Unlocked Jul 4, 2014 @ 1:32pm

Totally Metal

Transit - Kill 250 Zeds before completing the welding objective
Unlocked Jul 3, 2014 @ 9:26am

Multi-pass

Transit - Pick up the door key
Unlocked Jul 3, 2014 @ 9:06am

Science Hater

Transit - Destroy all the DNA vials
Unlocked Jul 3, 2014 @ 3:46am

Doctor WHO??

Transit - Get all Objective achievements AND beat KFO Transit on Hard or above to unlock Dr Rachel Clamely.
Unlocked Jul 3, 2014 @ 2:15pm

Gone clubbing

Beat Clandestine on Normal Difficulty
Unlocked Oct 17, 2014 @ 12:17pm

Rack 'em up

Beat Clandestine on Hard Difficulty
Unlocked Oct 20, 2014 @ 4:39am

Burned out

Beat Clandestine on Suicidal Difficulty
Unlocked Dec 7, 2014 @ 11:55pm

Hangover from Hell

Beat Clandestine on Hell Difficulty
Unlocked Dec 8, 2014 @ 12:53am

Skull Cracker

Clandestine - Destroy 30 skulls
Unlocked Oct 17, 2014 @ 12:05pm

Cave of Wonder

Beat ThrillsChills on Normal Difficulty
Unlocked Dec 6, 2014 @ 10:23am

Cavern of Pain

Beat ThrillsChills on Hard Difficulty
Unlocked Dec 6, 2014 @ 12:31pm

Grotto of Terror

Beat ThrillsChills on Suicidal Difficulty
Unlocked Dec 6, 2014 @ 1:20pm

Hollow of Horror

Beat ThrillsChills on Hell Difficulty
Unlocked Dec 6, 2014 @ 1:54pm

All shook up

Destroy all (15) Snow Globes
Unlocked Dec 6, 2014 @ 10:15am