"The Sacrifice” is the new add-on for Left 4 Dead.
JUMP SHOT
Not unlocked yetHeadshot a Hunter while he's leaping.
FIELD MEDIC
Not unlocked yetHeal 25 Survivors with a first aid kit.
DEAD GIVEAWAY
Not unlocked yetHeal a fellow Survivor when your own health is below 10.
20 CAR PILE-UP
Not unlocked yetAs A Tank hit 20 Survivors with a car in the Crash Course campaign.
WIPEFEST
Not unlocked yetYour team incapacitates three Survivors within five seconds.
LAMB 2 SLAUGHTER
Not unlocked yetAs an Infected, incap a Survivor who has entered and left a safe room.
OUTBREAK
Not unlocked yetCatch a rare strain of infection, then pass it on to someone else.
SPINAL TAP
Not unlocked yetKill an Infected with a single blow from behind.
All 4 Dead
Not unlocked yetKill all four Survivors on one life as a Tank.
Barrel Rolled
Not unlocked yetKill a Special Infected with an exploding barrel.
TANKBUSTERS
Not unlocked yetKill a Tank without it dealing any damage to a Survivor.
MAN VS TANK
Not unlocked yetSingle-handedly kill a Tank.
RED MIST
Not unlocked yetKill 1000 Infected with a mounted machine gun.
BACK 2 HELP
Not unlocked yetLeave a safe room to save an incapped teammate and bring them back safely.
BRAIN SALAD
Not unlocked yetMake 100 headshot kills.
BLIND LUCK
Not unlocked yetYou or another Survivor take no damage after being vomited on by a Boomer.
SAFETY FIRST
Not unlocked yetPlay an entire campaign with no Survivors taking friendly fire damage.
UNBREAKABLE
Not unlocked yetFinish a campaign without ever using a first aid kit on yourself.
UNTOUCHABLES
Not unlocked yetNo Survivors take damage after contacting the rescue vehicle.
CR0WND
Not unlocked yetKill a Witch with a single headshot.
LAST STAND
Not unlocked yetComplete one round of Survival on The Last Stand.
DOUBLE JUMP
Not unlocked yetPounce two different Survivors on one life as a Hunter.
MY BODYGUARD
Not unlocked yetProtect any Survivor from an attacking Infected 50 times.
DEAD STOP
Not unlocked yetPunch a Hunter as he is pouncing.