Left 4 Dead achievements

8.20%

Wipefest

Your team incapacitates three Survivors within five seconds in the Crash Course campaign.

8.26%

Chaos Generator

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

8.31%

What Are You Trying to Prove?

Survive all campaigns on Expert.

11.00%

Safety First

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

11.08%

Red Mist

Kill 1000 Infected with a mounted machine gun.

11.14%

Smash Hit

Win a Versus campaign of Crash Course.

11.17%

Kill Bill

Have Bill sacrifice himself for the team.

13.40%

Untouchables

No Survivors take damage after contacting the rescue vehicle.

14.25%

Zombicidal Maniac

Survive any campaign on Expert.

14.59%

Supreme Sacrifice

Complete "The Sacrifice".

14.81%

Stomach Upset

All Survivors complete a campaign without being vomited on.

15.24%

Tank Stumble

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

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