Zombie Panic! Source achievements

Complete Keretti as a Survivor once.

Survive Haunted as a Survivor once.

As a Zombie, steal the documents before the survivors obtain them on Aquatica.

As the Carrier, infect three survivors in the same round.

Win any round using only melee weapons (requires at least one melee kill).

Complete Subway as a Survivor once.

As the Carrier, use 'Roar' ability 250 times.

As a Survivor, barricade 150 times.

Complete Shreddingfield as a Survivor once.

As a Zombie, do a total of 800 damage on Thrillville.

Kill 3 zombies in a row through headshots with the baseball bat.

Survive Sapidcerebrum as a Survivor once.