Left 4 Dead
Harris's Progress
DEAD STOP
Punch a Hunter as he is pouncing.
DRAG AND DROP
Rescue a Survivor from a Smoker's tongue before he takes damage.
CR0WND
Kill a Witch with a single headshot.
UNTOUCHABLES
No Survivors take damage after contacting the rescue vehicle.
BLIND LUCK
You or another Survivor take no damage after being vomited on by a Boomer.
MY BODYGUARD
Protect any Survivor from an attacking Infected 50 times.
AKIMBO ASSASSIN
Survive an entire campaign using only pistols.
FIELD MEDIC
Heal 25 Survivors with a first aid kit.
PHARM-ASSIST
Give pain pills to 10 Survivors.
HELPING HAND
Revive 50 incapacitated Survivors.
HERO CLOSET
Rescue a Survivor trapped in a closet.
HUNTER PUNTER
Shove a Hunter off of a pinned and helpless Survivor.
TONGUE TWISTER
Kill a Smoker who has grabbed you with his tongue.
NO SMOKING SECTION
Kill 10 Smokers as they are pulling helpless Survivors.
101 CREMATIONS
Set 101 Infected on fire.
DO NOT DISTURB
Sneak past all Witches in a campaign without disturbing one.
MAN VS TANK
Single-handedly kill a Tank.
TANKBUSTERS
Kill a Tank without it dealing any damage to a Survivor.
SAFETY FIRST
Play an entire campaign with no Survivors taking friendly fire damage.
NO-ONE LEFT BEHIND
Beat a campaign with all 4 Survivors.
UNBREAKABLE
Finish a campaign without ever using a first aid kit on yourself.
WITCH HUNTER
Kill a Witch without any Survivor taking damage from her.
RED MIST
Kill 1000 Infected with a mounted machine gun.
PYROTECHNICIAN
Blow up 20 Infected in a single explosion.
ZOMBIE GENOCIDEST
Kill 53,595 Infected.
DEAD GIVEAWAY
Heal a fellow Survivor when your own health is below 10.
GROUND COVER
Save another Survivor from a Special Infected while on the ground.
CLEAN KILL
Shove a Boomer and then kill him without him splashing on anyone.
STAND TALL
Survive a campaign without being incapacitated.
BACK 2 HELP
Leave a safe room to save an incapped teammate and bring them back safely.
ZOMBICIDAL MANIAC
Survive any campaign on Expert.
WHAT ARE YOU TRYING TO PROVE?
Survive all campaigns on Expert.
NOTHING SPECIAL
Survive a campaign with no Survivors taking damage from Special Infected.
BURN THE WITCH
Light a Witch with a Molotov.
TOWERING INFERNO
Light a Tank with a Molotov.
SPINAL TAP
Kill an Infected with a single blow from behind.
STOMACH UPSET
All Survivors complete a campaign without being vomited on.
BRAIN SALAD
Make 100 headshot kills.
JUMP SHOT
Headshot a Hunter while he's leaping.
MERCY KILLER
Survive the No Mercy campaign.
TOLL COLLECTOR
Survive the Death Toll campaign.
DEAD BARON
Survive the Dead Air campaign.
GRIM REAPER
Survive the Blood Harvest campaign.
BARF BAGGED
Cover four Survivors with Boomer bile at once.
BIG DRAG
Drag a Survivor 100 feet with your tongue as a Smoker.
CHAIN SMOKER
Constrict two Survivors on one life as a Smoker.
DOUBLE JUMP
Pounce two different Survivors on one life as a Hunter.
All 4 Dead
Kill all four Survivors on one life as a Tank.
DEAD WRECKENING
Dole out 5000 total Survivor damage as a Special Infected.
LAMB 2 SLAUGHTER
As an Infected, incap a Survivor who has entered and left a safe room.
OUTBREAK
Catch a rare strain of infection, then pass it on to someone else.
LAST STAND
Complete one round of Survival on The Last Stand.
BRONZE METTLE
Earn a Bronze medal in Survival mode on any official level.
SILVER BULLETS
Earn a Silver medal in Survival mode on any official level.
VIOLENCE IS GOLDEN
Earn a Gold medal in Survival mode on any official level.
DISTINGUISHED SURVIVOR
Earn at least a Bronze medal on every official Survival level.
HEROIC SURVIVOR
Earn at least a Silver medal on every official Survival level.
LEGENDARY SURVIVOR
Earn a Gold medal on every official Survival level.
CRASH-PROOF
Survive the Crash Course Campaign.
QUICK POWER
Restart the generator within 30 seconds of it shutting off.
THE LITTLEST GENOCIDE
Kill 5,359 Infected in the Crash Course campaign.
SMASH HIT
Win a Versus campaign of Crash Course.
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.
JUMPIN' JACK SMASH
Pounce a Survivor for 25 points of damage in the Crash Course campaign.
SLIPPERY PULL
Smoker pull a bile-covered Survivor until you hold him during Crash Course.
TANK STUMBLE
Stun a Tank with an explosion in the Crash Course campaign.
WIPEFEST
Your team incapacitates three Survivors within five seconds.
Supreme Sacrifice
Complete "The Sacrifice".
Kill Bill
Have Bill sacrifice himself for the team.
Barrel Rolled
Kill a Special Infected with an exploding barrel.
Chaos Generator
Have all 3 generators running at once in "The Sacrifice" finale.
Sacrifizzle
As a Special Infected, incap someone who is trying to sacrifice themselves.