Complete "The Sacrifice".
Have Bill sacrifice himself for the team.
Kill 53,595 Infected.
Earn a Gold medal in Survival mode on any official level.
Catch a rare strain of infection, then pass it on to someone else.
Kill 1000 Infected with a mounted machine gun.
All Survivors complete a campaign without being vomited on.
Single-handedly kill a Tank.
Heal a fellow Survivor when your own health is below 10.
Heal 25 Survivors with a first aid kit.
Headshot a Hunter while he's leaping.
Save another Survivor from a Special Infected while on the ground.
Revive 50 incapacitated Survivors.
Survive the Dead Air campaign.
Sneak past all Witches in a campaign without disturbing one.
Survive the No Mercy campaign.
Survive a campaign without being incapacitated.
Give pain pills to 10 Survivors.
Complete one round of Survival on The Last Stand.
Survive the Crash Course Campaign.
Restart the generator within 30 seconds of it shutting off.
No Survivors take damage after contacting the rescue vehicle.
Survive the Death Toll campaign.
Earn a Silver medal in Survival mode on any official level.
Kill 10 Smokers as they are pulling helpless Survivors.
Earn a Bronze medal in Survival mode on any official level.
Set 101 Infected on fire.
Protect any Survivor from an attacking Infected 50 times.
You or another Survivor take no damage after being vomited on by a Boomer.
Light a Witch with a Molotov.
Kill an Infected with a single blow from behind.
Rescue a Survivor trapped in a closet.
Shove a Boomer and then kill him without him splashing on anyone.
Make 100 headshot kills.
Beat a campaign with all 4 Survivors.
Punch a Hunter as he is pouncing.
Rescue a Survivor from a Smoker's tongue before he takes damage.
Light a Tank with a Molotov.
Kill a Witch without any Survivor taking damage from her.
Shove a Hunter off of a pinned and helpless Survivor.
Survive the Blood Harvest campaign.
Kill a Tank without it dealing any damage to a Survivor.
Kill a Smoker who has grabbed you with his tongue.
Blow up 20 Infected in a single explosion.
Kill a Witch with a single headshot.
Survive an entire campaign using only pistols.
Play an entire campaign with no Survivors taking friendly fire damage.
Finish a campaign without ever using a first aid kit on yourself.
Leave a safe room to save an incapped teammate and bring them back safely.
Survive any campaign on Expert.
Survive all campaigns on Expert.
Survive a campaign with no Survivors taking damage from Special Infected.
Cover four Survivors with Boomer bile at once.
Drag a Survivor 100 feet with your tongue as a Smoker.
Constrict two Survivors on one life as a Smoker.
Pounce two different Survivors on one life as a Hunter.
Kill all four Survivors on one life as a Tank.
Dole out 5000 total Survivor damage as a Special Infected.
As an Infected, incap a Survivor who has entered and left a safe room.
Earn at least a Bronze medal on every official Survival level.
Earn at least a Silver medal on every official Survival level.
Earn a Gold medal on every official Survival level.
Kill 5,359 Infected in the Crash Course campaign.
Win a Versus campaign of Crash Course.
Your team wipes all Survivors after the escape vehicle has opened in Crash Course.
As A Tank hit 20 Survivors with a car in the Crash Course campaign.
Pounce a Survivor for 25 points of damage in the Crash Course campaign.
Smoker pull a bile-covered Survivor until you hold him during Crash Course.
Stun a Tank with an explosion in the Crash Course campaign.
Your team incapacitates three Survivors within five seconds.
Kill a Special Infected with an exploding barrel.
Have all 3 generators running at once in "The Sacrifice" finale.
As a Special Infected, incap someone who is trying to sacrifice themselves.
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