Obiettivi di Left 4 Dead

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

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

Earn a Gold medal on every official Survival level.

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

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

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

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

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

Kill a Special Infected with an exploding barrel.

Kill 5,359 Infected in the Crash Course campaign.

Survive all campaigns on Expert.

Your team incapacitates three Survivors within five seconds.

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

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

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

Kill 53,595 Infected.

Kill 1000 Infected with a mounted machine gun.

Win a Versus campaign of Crash Course.

Have Bill sacrifice himself for the team.

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

Survive any campaign on Expert.

All Survivors complete a campaign without being vomited on.

Survive an entire campaign using only pistols.

Kill all four Survivors on one life as a Tank.

Single-handedly kill a Tank.

No Survivors take damage after contacting the rescue vehicle.

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

Cover four Survivors with Boomer bile at once.

Complete "The Sacrifice".

Dole out 5000 total Survivor damage as a Special Infected.

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

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

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

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

Kill a Witch with a single headshot.

Heal 25 Survivors with a first aid kit.

Sneak past all Witches in a campaign without disturbing one.

Complete one round of Survival on The Last Stand.

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

Revive 50 incapacitated Survivors.

Give pain pills to 10 Survivors.

Constrict two Survivors on one life as a Smoker.

Restart the generator within 30 seconds of it shutting off.

Pounce two different Survivors on one life as a Hunter.

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

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

Survive a campaign without being incapacitated.

Survive the Blood Harvest campaign.

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

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

Survive the Death Toll campaign.

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

Survive the Dead Air campaign.

Survive the Crash Course Campaign.

Headshot a Hunter while he's leaping.

Punch a Hunter as he is pouncing.

Light a Witch with a Molotov.

Kill an Infected with a single blow from behind.

Kill 10 Smokers as they are pulling helpless Survivors.

Survive the No Mercy campaign.