Beat the tenth level

Beat the ninth level

Beat the seventh level

Beat the fifth level

Beat the third level

Beat the first level

Kill three zombies with one sniper rifle shot

Destroy 5 cars at the Overseer's Fume Pit without dying

Get hit by Nadja Drago's hockey stick and land in the goal

Press the retry button after completing a level

Kill a dog by making it fetch a grenade

Kick and shoot 10 enemies with a Shotgun before they hit the ground on one level