Left 4 Dead

DRAG AND DROP

Rescue a Survivor from a Smoker's tongue before he takes damage.

TONGUE TWISTER

Kill a Smoker who has grabbed you with his tongue.

TANKBUSTERS

Kill a Tank without it dealing any damage to a Survivor.

BRAIN SALAD

Make 100 headshot kills.

BLIND LUCK

You or another Survivor take no damage after being vomited on by a Boomer.

PYROTECHNICIAN

Blow up 20 Infected in a single explosion.

TOWERING INFERNO

Light a Tank with a Molotov.

HERO CLOSET

Rescue a Survivor trapped in a closet.

NO-ONE LEFT BEHIND

Beat a campaign with all 4 Survivors.

MY BODYGUARD

Protect any Survivor from an attacking Infected 50 times.

101 CREMATIONS

Set 101 Infected on fire.

HUNTER PUNTER

Shove a Hunter off of a pinned and helpless Survivor.

WITCH HUNTER

Kill a Witch without any Survivor taking damage from her.

NO SMOKING SECTION

Kill 10 Smokers as they are pulling helpless Survivors.

MERCY KILLER

Survive the No Mercy campaign.

SPINAL TAP

Kill an Infected with a single blow from behind.

BURN THE WITCH

Light a Witch with a Molotov.

DEAD STOP

Punch a Hunter as he is pouncing.

JUMP SHOT

Headshot a Hunter while he's leaping.

CRASH-PROOF

Survive the Crash Course Campaign.

GROUND COVER

Save another Survivor from a Special Infected while on the ground.

DEAD BARON

Survive the Dead Air campaign.

TOLL COLLECTOR

Survive the Death Toll campaign.

OUTBREAK

Catch a rare strain of infection, then pass it on to someone else.

CLEAN KILL

Shove a Boomer and then kill him without him splashing on anyone.

GRIM REAPER

Survive the Blood Harvest campaign.

STAND TALL

Survive a campaign without being incapacitated.

DEAD GIVEAWAY

Heal a fellow Survivor when your own health is below 10.

BRONZE METTLE

Earn a Bronze medal in Survival mode on any official level.

DOUBLE JUMP

Pounce two different Survivors on one life as a Hunter.

QUICK POWER

Restart the generator within 30 seconds of it shutting off.

CHAIN SMOKER

Constrict two Survivors on one life as a Smoker.

PHARM-ASSIST

Give pain pills to 10 Survivors.

HELPING HAND

Revive 50 incapacitated Survivors.

BACK 2 HELP

Leave a safe room to save an incapped teammate and bring them back safely.

LAST STAND

Complete one round of Survival on The Last Stand.

DO NOT DISTURB

Sneak past all Witches in a campaign without disturbing one.

FIELD MEDIC

Heal 25 Survivors with a first aid kit.

SILVER BULLETS

Earn a Silver medal in Survival mode on any official level.

CR0WND

Kill a Witch with a single headshot.

BIG DRAG

Drag a Survivor 100 feet with your tongue as a Smoker.

LAMB 2 SLAUGHTER

As an Infected, incap a Survivor who has entered and left a safe room.

DEAD WRECKENING

Dole out 5000 total Survivor damage as a Special Infected.

VIOLENCE IS GOLDEN

Earn a Gold medal in Survival mode on any official level.

Supreme Sacrifice

Complete "The Sacrifice".

BARF BAGGED

Cover four Survivors with Boomer bile at once.

TANK STUMBLE

Stun a Tank with an explosion in the Crash Course campaign.

UNTOUCHABLES

No Survivors take damage after contacting the rescue vehicle.

MAN VS TANK

Single-handedly kill a Tank.

All 4 Dead

Kill all four Survivors on one life as a Tank.

AKIMBO ASSASSIN

Survive an entire campaign using only pistols.

STOMACH UPSET

All Survivors complete a campaign without being vomited on.

ZOMBICIDAL MANIAC

Survive any campaign on Expert.

UNBREAKABLE

Finish a campaign without ever using a first aid kit on yourself.

Kill Bill

Have Bill sacrifice himself for the team.

SMASH HIT

Win a Versus campaign of Crash Course.

RED MIST

Kill 1000 Infected with a mounted machine gun.

ZOMBIE GENOCIDEST

Kill 53,595 Infected.

Chaos Generator

Have all 3 generators running at once in "The Sacrifice" finale.

SAFETY FIRST

Play an entire campaign with no Survivors taking friendly fire damage.

SLIPPERY PULL

Smoker pull a bile-covered Survivor until you hold him during Crash Course.

WIPEFEST

Your team incapacitates three Survivors within five seconds.

WHAT ARE YOU TRYING TO PROVE?

Survive all campaigns on Expert.

THE LITTLEST GENOCIDE

Kill 5,359 Infected in the Crash Course campaign.

DISTINGUISHED SURVIVOR

Earn at least a Bronze medal on every official Survival level.

Barrel Rolled

Kill a Special Infected with an exploding barrel.

JUMPIN' JACK SMASH

Pounce a Survivor for 25 points of damage in the Crash Course campaign.

NOTHING SPECIAL

Survive a campaign with no Survivors taking damage from Special Infected.

HEROIC SURVIVOR

Earn at least a Silver medal on every official Survival level.

LEGENDARY SURVIVOR

Earn a Gold medal on every official Survival level.

TRUCK STOP

Your team wipes all Survivors after the escape vehicle has opened in Crash Course.

20 CAR PILE-UP

As A Tank hit 20 Survivors with a car in the Crash Course campaign.

Sacrifizzle

As a Special Infected, incap someone who is trying to sacrifice themselves.