Left 4 Dead 2 Achievements

Kill 10 swampy Mudmen while they are in the water.

Kill a pouncing Hunter with a shotgun.

As the Spitter, hit every Survivor with a single acid patch.

Use every melee weapon to kill Common Infected.

Complete "The Sacrifice".

Survive the Swamp Fever campaign.

Survive the Parish campaign.

Survive the Hard Rain campaign.

Ignite 50 Common Infected with incendiary ammo.

Decapitate 200 Infected with a melee weapon.

Kill 100 Common Infected with the chainsaw.

Survive the Dark Carnival campaign.

Survive The Passing Campaign.

Use a bile bomb on a Tank.

Revive an incapacitated teammate while a Tank is nearby.

Kill one of each Uncommon Infected.

Survive the Dead Center campaign.

Deploy an ammo upgrade and have your team use it.

Kill a Jockey within 2 seconds of it jumping on a Survivor.

Kill a Spitter before she is able to spit.