ACID REFLEX
Kill a Spitter before she is able to spit.
73.3%
A RIDE DENIED
Kill a Jockey within 2 seconds of it jumping on a Survivor.
68.6%
ARMORY OF ONE
Deploy an ammo upgrade and have your team use it.
63.5%
CRASS MENAGERIE
Kill one of each Uncommon Infected.
51.0%
PRICE CHOPPER
Survive the Dead Center campaign.
46.3%
SEPTIC TANK
Use a bile bomb on a Tank.
44.4%
BURNING SENSATION
Ignite 50 Common Infected with incendiary ammo.
36.3%
CHAIN OF COMMAND
Kill 100 Common Infected with the chainsaw.
36.2%
TORCH BEARER
Survive The Passing Campaign.
34.4%
HEAD HONCHO
Decapitate 200 Infected with a melee weapon.
34.1%
MIDNIGHT RIDER
Survive the Dark Carnival campaign.
33.8%
GREAT EXPECTORATIONS
As the Spitter, hit every Survivor with a single acid patch.
31.9%
QUALIFIED RIDE
As the Jockey, ride a Survivor for more than 12 seconds.
30.8%
WEATHERMAN
Survive the Hard Rain campaign.
29.8%
CLUB DEAD
Use every melee weapon to kill Common Infected.
29.7%
BACK IN THE SADDLE
As the Jockey, ride the Survivors twice in a single life.
29.3%
BRIDGE BURNER
Survive the Parish campaign.
26.7%
RAGIN' CAJUN
Survive the Swamp Fever campaign.
26.7%
MEAT TENDERIZER
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
25.4%
RODE HARD, PUT AWAY WET
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
24.9%
SUPREME SACRIFICE
Complete "The Sacrifice".
23.6%
DEAD IN THE WATER
Kill 10 swampy Mudmen while they are in the water.
23.4%
KILLING THEM SWIFTLY TO THIS SONG
Play the new Midnight Riders song on a jukebox.
23.3%
ROBBED ZOMBIE
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
22.6%
FRIED PIPER
Using a Molotov, burn a Clown leading at least 10 Common Infected.
22.5%
A SPITTLE HELP FROM MY FRIENDS
As the Spitter, spit on a Survivor being choked by a Smoker.
20.2%
CL0WND
Honk the noses of 10 Clowns.
19.3%
DISMEMBERMENT PLAN
Kill 15 Infected with a single grenade launcher blast.
18.9%
KILL BILL
Have Bill sacrifice himself for the team.
18.7%
LONG DISTANCE CARRIER
As the Charger, grab a Survivor and carry them over 80 feet.
18.2%
VIOLENCE IN SILENCE
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
16.3%
GRAVE ROBBER
Collect 10 items dropped by a Fallen Survivor.
16.3%
CACHE GRAB
Open 5 foot lockers.
16.1%
KITE LIKE A MAN
Kill a Tank only with damage from the original Survivors.
15.7%
FORE!
Knock off the heads of 18 infected with the golf club.
15.4%
STREAM CROSSER
Survive the Cold Stream campaign on any difficulty.
14.4%
HUNTING PARTY
Win a game of Scavenge.
14.0%
STACHE WHACKER
Prove you are faster than Moustachio.
13.3%
GUARDIN' GNOME
Rescue Gnome Chompski from the Carnival.
12.4%
SCAVENGE HUNT
Stop the enemy team from collecting any gas cans during a Scavenge round.
12.3%
LEVEL A CHARGE
Kill a Charger with a melee weapon while they are charging.
11.4%
GONG SHOW
Prove you are stronger than Moustachio.
11.2%
CACHE AND CARRY
Collect 15 gas cans in a single Scavenge round.
11.0%
SCATTERING RAM
As the Charger, bowl through the entire enemy team in a single charge.
10.9%
TANK BURGER
Kill a Tank with melee weapons.
10.9%
TIL IT GOES CLICK
Using the M60, kill 25 infected without letting go of the trigger.
10.3%
SOB STORY
Navigate the sugar mill and reach the safe room without killing any Witches.
10.3%
CHAOS GENERATOR
Have all 3 generators running at once in "The Sacrifice" finale.
9.2%
FUEL CRISIS
Make a Survivor drop a gas can during overtime.
8.8%
Valve Gift Grab 2011 – L4D2
Collect three gifts dropped by Special Infected in Versus Mode.
8.8%
BARREL ROLLED
Kill a Special Infected with an exploding barrel.
8.3%
SHOCK JOCK
Revive 10 dead Survivors with the defibrillator.
7.7%
MUTANT OVERLORD
Play 6 Mutations.
7.2%
BRIDGE OVER TREBLED SLAUGHTER
Cross the bridge finale in less than three minutes.
7.2%
CONFEDERACY OF CRUNCHES
Finish a campaign using only melee weapons.
7.1%
WING AND A PRAYER
Defend yourself at the crashed airliner without taking damage.
6.4%
THE QUICK AND THE DEAD
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
5.7%
CONNECTING FIGHTS
Play a Versus game on Dead Air from start to finish.
4.8%
BEAT THE RUSH
In a Survival round, get a medal only using melee weapons.
3.6%
GAS GUZZLER
Collect 100 gas cans in Scavenge.
3.5%
GAS SHORTAGE
Cause 25 gas can drops as a Special Infected.
3.2%
THE REAL DEAL
Survive a campaign on Expert skill with Realism mode enabled.
2.5%
STILL SOMETHING TO PROVE
Survive all campaigns on Expert.
2.2%
STRENGTH IN NUMBERS
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
2.0%
PORT OF SCAVENGE
Play 5 full games of Scavenge on The Port.
1.8%
HEARTWARMER
In a Versus round, leave the saferoom to defibrillate a dead teammate.
1.7%
GOOD GUY NICK
Plays games with free weekend players and helps them survive a campaign.
1.5%
SACRIFIZZLE
As a Special Infected, incap someone who is trying to sacrifice themselves.
1.3%
WEDDING CRASHER
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
1.1%
