ACID REFLEX
Kill a Spitter before she is able to spit.
A RIDE DENIED
Kill a Jockey within 2 seconds of it jumping on a Survivor.
ARMORY OF ONE
Deploy an ammo upgrade and have your team use it.
CRASS MENAGERIE
Kill one of each Uncommon Infected.
PRICE CHOPPER
Survive the Dead Center campaign.
SEPTIC TANK
Use a bile bomb on a Tank.
BURNING SENSATION
Ignite 50 Common Infected with incendiary ammo.
CHAIN OF COMMAND
Kill 100 Common Infected with the chainsaw.
HEAD HONCHO
Decapitate 200 Infected with a melee weapon.
TORCH BEARER
Survive The Passing Campaign.
MIDNIGHT RIDER
Survive the Dark Carnival campaign.
GREAT EXPECTORATIONS
As the Spitter, hit every Survivor with a single acid patch.
WEATHERMAN
Survive the Hard Rain campaign.
QUALIFIED RIDE
As the Jockey, ride a Survivor for more than 12 seconds.
CLUB DEAD
Use every melee weapon to kill Common Infected.
BACK IN THE SADDLE
As the Jockey, ride the Survivors twice in a single life.
RAGIN' CAJUN
Survive the Swamp Fever campaign.
BRIDGE BURNER
Survive the Parish campaign.
MEAT TENDERIZER
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
RODE HARD, PUT AWAY WET
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
DEAD IN THE WATER
Kill 10 swampy Mudmen while they are in the water.
KILLING THEM SWIFTLY TO THIS SONG
Play the new Midnight Riders song on a jukebox.
SUPREME SACRIFICE
Complete "The Sacrifice".
ROBBED ZOMBIE
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
FRIED PIPER
Using a Molotov, burn a Clown leading at least 10 Common Infected.
CL0WND
Honk the noses of 10 Clowns.
A SPITTLE HELP FROM MY FRIENDS
As the Spitter, spit on a Survivor being choked by a Smoker. 2
DISMEMBERMENT PLAN
Kill 15 Infected with a single grenade launcher blast.
KILL BILL
Have Bill sacrifice himself for the team.
LONG DISTANCE CARRIER
As the Charger, grab a Survivor and carry them over 80 feet.
VIOLENCE IN SILENCE
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
CACHE GRAB
Open 5 foot lockers.
GRAVE ROBBER
Collect 10 items dropped by a Fallen Survivor.
FORE!
Knock off the heads of 18 infected with the golf club.
KITE LIKE A MAN
Kill a Tank only with damage from the original Survivors.
STACHE WHACKER
Prove you are faster than Moustachio.
HUNTING PARTY
Win a game of Scavenge.
GUARDIN' GNOME
Rescue Gnome Chompski from the Carnival.
STREAM CROSSER
Survive the Cold Stream campaign on any difficulty.
GONG SHOW
Prove you are stronger than Moustachio.
LEVEL A CHARGE
Kill a Charger with a melee weapon while they are charging.
TANK BURGER
Kill a Tank with melee weapons.
SCAVENGE HUNT
Stop the enemy team from collecting any gas cans during a Scavenge round.
CACHE AND CARRY
Collect 15 gas cans in a single Scavenge round.
SCATTERING RAM
As the Charger, bowl through the entire enemy team in a single charge.
TIL IT GOES CLICK
Using the M60, kill 25 infected without letting go of the trigger.
SOB STORY
Navigate the sugar mill and reach the safe room without killing any Witches.
FUEL CRISIS
Make a Survivor drop a gas can during overtime.
CHAOS GENERATOR
Have all 3 generators running at once in "The Sacrifice" finale.
BARREL ROLLED
Kill a Special Infected with an exploding barrel.
SHOCK JOCK
Revive 10 dead Survivors with the defibrillator.
BRIDGE OVER TREBLED SLAUGHTER
Cross the bridge finale in less than three minutes.
MUTANT OVERLORD
Play 6 Mutations.
CONFEDERACY OF CRUNCHES
Finish a campaign using only melee weapons.
WING AND A PRAYER
Defend yourself at the crashed airliner without taking damage.
Valve Gift Grab 2011 – L4D2
Collect three gifts dropped by Special Infected in Versus Mode.
THE QUICK AND THE DEAD
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
CONNECTING FIGHTS
Play a Versus game on Dead Air from start to finish.
BEAT THE RUSH
In a Survival round, get a medal only using melee weapons.
GAS GUZZLER
Collect 100 gas cans in Scavenge.
GAS SHORTAGE
Cause 25 gas can drops as a Special Infected.
THE REAL DEAL
Survive a campaign on Expert skill with Realism mode enabled.
STILL SOMETHING TO PROVE
Survive all campaigns on Expert.
STRENGTH IN NUMBERS
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
PORT OF SCAVENGE
Play 5 full games of Scavenge on The Port.
HEARTWARMER
In a Versus round, leave the saferoom to defibrillate a dead teammate.
SACRIFIZZLE
As a Special Infected, incap someone who is trying to sacrifice themselves.
WEDDING CRASHER
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
