ACID REFLEX
Kill a Spitter before she is able to spit.
59.2%
A RIDE DENIED
Kill a Jockey within 2 seconds of it jumping on a Survivor.
55.3%
ARMORY OF ONE
Deploy an ammo upgrade and have your team use it.
51.3%
CRASS MENAGERIE
Kill one of each Uncommon Infected.
41.2%
PRICE CHOPPER
Survive the Dead Center campaign.
37.4%
SEPTIC TANK
Use a bile bomb on a Tank.
35.8%
BURNING SENSATION
Ignite 50 Common Infected with incendiary ammo.
29.3%
CHAIN OF COMMAND
Kill 100 Common Infected with the chainsaw.
29.3%
TORCH BEARER
Survive The Passing Campaign.
27.8%
HEAD HONCHO
Decapitate 200 Infected with a melee weapon.
27.6%
MIDNIGHT RIDER
Survive the Dark Carnival campaign.
27.3%
GREAT EXPECTORATIONS
As the Spitter, hit every Survivor with a single acid patch.
25.8%
QUALIFIED RIDE
As the Jockey, ride a Survivor for more than 12 seconds.
24.9%
WEATHERMAN
Survive the Hard Rain campaign.
24.1%
CLUB DEAD
Use every melee weapon to kill Common Infected.
24.0%
BACK IN THE SADDLE
As the Jockey, ride the Survivors twice in a single life.
23.7%
BRIDGE BURNER
Survive the Parish campaign.
21.6%
RAGIN' CAJUN
Survive the Swamp Fever campaign.
21.6%
MEAT TENDERIZER
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
20.6%
RODE HARD, PUT AWAY WET
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
20.1%
SUPREME SACRIFICE
Complete "The Sacrifice".
19.1%
DEAD IN THE WATER
Kill 10 swampy Mudmen while they are in the water.
18.9%
KILLING THEM SWIFTLY TO THIS SONG
Play the new Midnight Riders song on a jukebox.
18.8%
ROBBED ZOMBIE
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
18.3%
FRIED PIPER
Using a Molotov, burn a Clown leading at least 10 Common Infected.
18.2%
A SPITTLE HELP FROM MY FRIENDS
As the Spitter, spit on a Survivor being choked by a Smoker.
16.3%
CL0WND
Honk the noses of 10 Clowns.
15.6%
DISMEMBERMENT PLAN
Kill 15 Infected with a single grenade launcher blast.
15.3%
KILL BILL
Have Bill sacrifice himself for the team.
15.1%
LONG DISTANCE CARRIER
As the Charger, grab a Survivor and carry them over 80 feet.
14.7%
VIOLENCE IN SILENCE
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
13.2%
GRAVE ROBBER
Collect 10 items dropped by a Fallen Survivor.
13.2%
CACHE GRAB
Open 5 foot lockers.
13.0%
KITE LIKE A MAN
Kill a Tank only with damage from the original Survivors.
12.7%
FORE!
Knock off the heads of 18 infected with the golf club.
12.4%
STREAM CROSSER
Survive the Cold Stream campaign on any difficulty.
11.8%
HUNTING PARTY
Win a game of Scavenge.
11.3%
STACHE WHACKER
Prove you are faster than Moustachio.
10.7%
SCAVENGE HUNT
Stop the enemy team from collecting any gas cans during a Scavenge round.
10.0%
GUARDIN' GNOME
Rescue Gnome Chompski from the Carnival.
10.0%
LEVEL A CHARGE
Kill a Charger with a melee weapon while they are charging.
9.2%
GONG SHOW
Prove you are stronger than Moustachio.
9.0%
TANK BURGER
Kill a Tank with melee weapons.
8.9%
CACHE AND CARRY
Collect 15 gas cans in a single Scavenge round.
8.9%
SCATTERING RAM
As the Charger, bowl through the entire enemy team in a single charge.
8.8%
SOB STORY
Navigate the sugar mill and reach the safe room without killing any Witches.
8.4%
TIL IT GOES CLICK
Using the M60, kill 25 infected without letting go of the trigger.
8.3%
CHAOS GENERATOR
Have all 3 generators running at once in "The Sacrifice" finale.
7.5%
FUEL CRISIS
Make a Survivor drop a gas can during overtime.
7.1%
Valve Gift Grab 2011 – L4D2
Collect three gifts dropped by Special Infected in Versus Mode.
7.0%
BARREL ROLLED
Kill a Special Infected with an exploding barrel.
6.7%
SHOCK JOCK
Revive 10 dead Survivors with the defibrillator.
6.3%
BRIDGE OVER TREBLED SLAUGHTER
Cross the bridge finale in less than three minutes.
5.9%
MUTANT OVERLORD
Play 6 Mutations.
5.8%
CONFEDERACY OF CRUNCHES
Finish a campaign using only melee weapons.
5.7%
WING AND A PRAYER
Defend yourself at the crashed airliner without taking damage.
5.1%
THE QUICK AND THE DEAD
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
4.6%
CONNECTING FIGHTS
Play a Versus game on Dead Air from start to finish.
3.9%
BEAT THE RUSH
In a Survival round, get a medal only using melee weapons.
3.0%
GAS GUZZLER
Collect 100 gas cans in Scavenge.
2.9%
GAS SHORTAGE
Cause 25 gas can drops as a Special Infected.
2.6%
THE REAL DEAL
Survive a campaign on Expert skill with Realism mode enabled.
2.1%
STILL SOMETHING TO PROVE
Survive all campaigns on Expert.
1.8%
STRENGTH IN NUMBERS
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
1.6%
PORT OF SCAVENGE
Play 5 full games of Scavenge on The Port.
1.5%
HEARTWARMER
In a Versus round, leave the saferoom to defibrillate a dead teammate.
1.4%
GOOD GUY NICK
Plays games with free weekend players and helps them survive a campaign.
1.2%
SACRIFIZZLE
As a Special Infected, incap someone who is trying to sacrifice themselves.
1.0%
WEDDING CRASHER
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
0.9%
