0 3 Ring CircusWin a Long Game on Abusement Park on Suicidal Difficulty.
0 A Bit BarmyWin a Long Game on Bedlam on Normal Difficulty.
0 Alligator FarmerWin a Long Game on Farm on Suicidal Difficulty.
0 And Back to SchoolComplete a Long Game on all 3 Summer 2009 maps (Bedlam, Foundry, Wyre) on Suicidal Difficulty.
0 Assistant HomicideKill 2 Circus Stalkers with a Melee weapon to the back in one wave.
0 Back to WorkKill 20 Christmas Clots in one wave.
0 Bad SantaUnlock 10 of the 13 Christmas Achievements along with any Christmas Map achievement.
0 Bear King of the Dark ForestWin a Long Game on Wyre on Suicidal Difficulty.
0 Bitter IronyKill 2 Scrakes with a Chainsaw in a Single Wave.
0 Blooper ReelTurn 500 Zeds into Giblets using the M79.
0 Boss from HellWin a Long Game on Offices on Hell on Earth Difficulty.
0 Burning up the MidwayKill 10 Circus Clots with a Fire-based weapon.
0 Burst PipeWin a Long Game on Waterworks on Hard Difficulty.
0 Can't Catch Me!Kill 2 Christmas Gorefasts with a Melee weapon from behind in one wave.
0 Careful SpenderKill 4 Specimens with a Single Shot from a Hunting Shotgun.
0 Cattle FarmerWin a Long Game on Farm on Hard Difficulty.
0 Chicken FarmerWin a Long Game on Farm on Normal Difficulty.
0 Clearing Clown AlleyKill 5 Circus Bloats in one game.
0 CometWin a Long Game on Icebreaker on Hell on Earth Difficulty.
0 Commit-ed for lifeWin a Long Game on Bedlam on Hell on Earth Difficulty.
0 Complete BarkingWin a Long Game on Bedlam on Suicidal Difficulty.
0 Cracked the Nutcracker!Land the killing blow on a Christmas Fleshpound with a Knife.
0 Crushed IceWin a Long Game on Icebreaker on Hard Difficulty.
0 DaytripWin a Long Game on Mountain Pass on Normal Difficulty.
0 Dear DepartedWin a Long Game on Departed on Hell on Earth Difficulty.
0 Death To The Mad ScientistDefeat the Patriarch on Suicidal.
0 Deck the Halls with Buckets o' BloodKill 3 Christmas Zeds in 1 ZED time chain with a Melee weapon.
0 Demon FarmerWin a Long Game on Farm on Hell on Earth Difficulty.
0 Demonic King of the ManorWin a Long Game on Manor on Hell on Earth Difficulty.
0 Departure GalleryWin a Long Game on Departed on Normal Difficulty.
0 Departure GateWin a Long Game on Departed on Suicidal Difficulty.
0 Departure LoungeWin a Long Game on Departed on Hard Difficulty.
0 Devil CakeComplete all new map achievements on Hell On Earth Difficulty.
0 Diablo Steel ManWin a Long Game on Foundry on Hell on Earth Difficulty.
0 Dignity for the DeadKill 10 Specimens Feeding on Dead Teammates Corpses.
0 Dog and Pony ShowWin a Long Game on Abusement Park on Hard Difficulty.
0 Dot of DoomGet 25 headshots in a row with the EBR while using the Laser Sight.
0 Duke of the ManorWin a Long Game on Manor on Hard Difficulty.
0 Eggnog Anyone?Get covered in Christmas Bloat Bile and live for 10 seconds on Hard, Suicidal, or Hell on Earth.
0 Elephant GunLand the killing blow on a Circus Fleshpound with a Pistol.
0 Emperor of the ManorWin a Long Game on Manor on Suicidal Difficulty.
0 ExperimenticenticideKill 100 Specimens.
0 ExperimentilottacideKill 10,000 Specimens.
0 ExperimentimillicideKill 1,000 Specimens.
0 Explosive PersonalityAs Demolitions, kill 1000 Specimens with the Pipebomb.
0 Fascist DietitianKill 200 Bloats.
0 Fending off Mrs. ClawsKill 3 Christmas Stalkers with a Lever Action Rifle without reloading.
0 Flaming Hell, That Was CloseAs Firebug, kill the Husk with the Flamethrower
0 Flea CircusWin a Long Game on Abusement Park on Normal Difficulty.
0 Floodgate to HellWin a Long Game on Waterworks on Hell on Earth Difficulty.
0 Fruit CakeComplete all new map achievements on Suicidal Difficulty.
0 Getting ChunkyObliterate 10 Zeds at once with the Pipe Bomb.
0 Gimme a Plaster!Win a Long Game on Hospital Horrors on Normal Difficulty.
0 Golden PotatoGet into GLaDOS' core on Aperture.
0 Gone CampingWin a Long Game on Mountain Pass on Hard Difficulty.
0 Gone MentalWin a Long Game on Bedlam on Hard Difficulty.
0 Grandma got Eaten by a ReindeerWin a Long Game on Santa's Evil Lair on Hell
0 Hard BossWin a Long Game on Offices on Hard Difficulty.
0 Hard Pub CrawlWin a Long Game on West London on Hard Difficulty.
0 Healing TouchHeal 200 teammates with the MP7's medication dart.
0 Hellish Pub CrawlWin a Long Game on West London on Hell on Earth Difficulty.
0 Homer's HeroesKill 100 Sirens.
0 Hot Cross FunKill 25 Burning Specimens with a Crossbow.
0 I Like To WatchAquire 5 Minutes of 'Zed-Time'.
0 I'm Dreaming of a Red ChristmasWin a Long Game on Santa's Evil Lair on Suicidal Difficulty.
0 I'm Dying Here!Win a Long Game on Hospital Horrors on Suicidal Difficulty.
0 I'm Making a Note Here, Huge SuccessWin a Long Game on Aperture on Hell on Earth Difficulty.
0 Ice CubeWin a Long Game on Icebreaker on Normal Difficulty.
0 IcebergWin a Long Game on Icebreaker on Suicidal Difficulty.
0 It's Not Easy Being GreasyCause a Specimen to Die by Luring them into Bloat Acid.
0 It's What's Inside That CountsTurn 500 Specimens into Giblets.
0 Juggling ActDrop 5 different Tier 2 weapons in one wave.
0 Keep Those Sneakers Off the Floor!Kill 20 Stalkers with Explosives.
0 Killer JuniorKill 20 crawlers in mid-air with the M79.
0 Lab AssistantWin a Long Game on Biotics Lab on Hard Difficulty.
0 Lab CleanerWin a Long Game on Biotics Lab on Normal Difficulty.
0 Lab ProfessorWin a Long Game on Biotics Lab on Suicidal Difficulty.
0 Let Them BurnGet 1000 points of burn damage with the MAC-10.
0 Lifting a DumbellKill a Circus Husk with a LAW.
0 Long, Hot SummerComplete a Long Game on all 3 Summer 2009 maps (Bedlam, Foundry, Wyre) on Normal Difficulty.
0 Lord of the ManorWin a Long Game on Manor on Normal Difficulty.
0 Mad BossWin a Long Game on Offices on Suicidal Difficulty.
0 Man of SteelWin a Long Game on Foundry on Suicidal Difficulty.
0 Master SurgeonAs a Medic, Kill 8 Specimens using a Knife in a Single Wave.
0 Merry Friggin ChristmasKill the Christmas Patriarch.
0 Merry MenKill the Patriarch when everyone is ONLY using Crossbows.
0 Missed ConnectionWin a Long Game on Filth's Cross on Hard Difficulty.
0 MountaineerWin a Long Game on Mountain Pass on Suicidal Difficulty.
0 Mr. PerkyGet All of your Perks up to Level 5.
0 Neighborhood WatchWin a Long Game on Suburbia on Normal Difficulty.
0 Not Dead Yet!Win a Long Game on Hospital Horrors on Hell on Earth Difficulty.
0 Not So Silent NightKill a Christmas Siren with an undetonated LAW rocket.
0 On Top of the Big TopWin a Long Game on Abusement Park on Hell on Earth Difficulty.
0 Park RangerWin a Long Game on Mountain Pass on Hell on Earth Difficulty.
0 PhilanthropistGive 1,000 Pounds to Teammates who have 50% of Your Cash or Less.
0 Piece of CakeComplete all new map achievements on Normal Difficulty.
0 Pile UpWin a Long Game on Filth's Cross on Hell on Earth Difficulty.
0 Pound CakeComplete all new map achievements on Hard Difficulty.
0 Pound ThisKill 100 Fleshpounds with the AA12.
0 Pressure FailureWin a Long Game on Waterworks on Suicidal Difficulty.
0 Private SecurityWin a Long Game on Suburbia on Hard Difficulty.
0 Pub CrawlWin a Long Game on West London on Normal Difficulty.
0 Punk'dUnlock 10 of the 13 Circus Achievements along with any Abusement Park achievement.
0 Quarter Pounder With EaseTurn 5 Fleshpounds into Giblets.
0 Raccoon King of the Dark ForestWin a Long Game on Wyre on Hard Difficulty.
0 Random Axe of KindnessKill 15 Specimens with a Fire Axe in a Single Wave.
0 RingmasterKill the 'Ring Leader' (Circus Patriarch)
0 Rudolph, the Bloody Nosed ReindeerKill a Christmas Crawler with a Crossbow.
0 Running LateWin a Long Game on Filth's Cross on Normal Difficulty.
0 Scar'dKill 1,000 Specimens with the SCAR.
0 Science Got DoneWin a Long Game on Aperture on Normal Difficulty.
0 Scientist from HellWin a Long Game on Biotics Lab on Hell on Earth Difficulty.
0 Seeing DoubleKill 5 Circus Crawlers with a Bullpup in one wave.
0 Self MedicatorIn Co-op Mode, Use Syringe on Yourself 100 Times.
0 Silent Night, Evil NightWin a Long Game on Santa's Evil Lair on Hard Difficulty.
0 Slight DripWin a Long Game on Waterworks on Normal Difficulty.
0 Small HandsKill 3 Circus Clots in a wave with the Lever Action Rifle.
0 Social OutburstKill 8 Specimens with One Grenade.
0 Sparing with a MasterKill a Circus Gorefast with a Melee weapon.
0 Squirrel King of the Dark ForestWin a Long Game on Wyre on Normal Difficulty.
0 Steel WorkerWin a Long Game on Foundry on Hard Difficulty.
0 Still AliveWin a Long Game on Aperture on Hard Difficulty.
0 Straight RushKill the Patriarch Before he has a Chance to Heal.
0 Suicidal Pub CrawlWin a Long Game on West London on Suicidal Difficulty.
0 Summer of 2009Complete a Long Game on all 3 Summer 2009 maps (Bedlam, Foundry, Wyre) on Hard Difficulty.
0 SWATWin a Long Game on Suburbia on Hell on Earth Difficulty.
0 Taking Down the Big TopKill 4 Circus Zeds in 1 ZED time chain with a Melee weapon.
0 That Bloody Well Hurts!Win a Long Game on Hospital Horrors on Hard Difficulty.
0 That's not Santa!Kill 3 Christmas Bloats with the Bullpup in one wave.
0 The Big HuntKill a Circus Scrake with a Crossbow.
0 The BossWin a Long Game on Offices on Normal Difficulty.
0 The Completely Suicidal WarComplete a Long Game on all 5 Core Maps on Suicidal Difficulty.
0 The Hard WarComplete a Long Game on all 5 Core Maps on Hard Difficulty.
0 The L.A.W. That Broke The Camel's BackDeliver the Killing Blow to the Patriarch with a L.A.W. Rocket.
0 The Long WarComplete a Long Game on all 5 Core Maps on Normal Difficulty.
0 Thin-Ice PirouetteComplete 10 Waves when the Rest of your Team has Died.
0 This is a TriumphWin a Long Game on Aperture on Suicidal Difficulty.
0 Tin ManWin a Long Game on Foundry on Normal Difficulty.
0 Tis Better to Give than to ReceiveDrop 3 Tier 3 weapons for others (with which they kill at least one Christmas Zed).
0 Toasted Jack FrostKill the Christmas Scrake with a Fire-based weapon.
0 Too Close For ComfortFinish off a Fleshpound using a Melee Attack.
0 Train WreckWin a Long Game on Filth's Cross on Suicidal Difficulty.
0 Uber TuberExpensive but delicious! Brought to you by Dr. Dougley and Lord Ned.
0 VigilanteWin a Long Game on Suburbia on Suicidal Difficulty.
0 Walking in A Winter Horror LandWin a Long Game on Santa's Evil Lair on Normal Difficulty.
0 Warehouse ForemanWin a Long Game on Crash on Suicidal Difficulty.
0 Warehouse Forklift OperatorWin a Long Game on Crash on Hard Difficulty.
0 Warehouse JanitorWin a Long Game on Crash on Normal Difficulty.
0 Warehouse ManagerWin a Long Game on Crash on Hell on Earth Difficulty.
0 Waste DisposalWin a Long Game on Biohazard on Normal Difficulty.
0 Waste LandWin a Long Game on Biohazard on Hard Difficulty.
0 Waste of SpaceWin a Long Game on Biohazard on Suicidal Difficulty.
0 WastedWin a Long Game on Biohazard on Hell on Earth Difficulty.
0 Who Brings a Gun to a Snow Ball Fight?Kill a Christmas Husk with any Pistol.
0 Windjammer EnthusiastSurvive 10 seconds after being screamed at by a Circus Siren on Hard or above.
0 Wolf King of the Dark ForestWin a Long Game on Wyre on Hell on Earth Difficulty.