Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)

Kill a Brute without taking damage

Complete the Solar Array Puzzle

Defeat the AI

Win the fight at the School

Survive your first encounter with Stalkers

Stomp 10 Containers

Use Quick Heal ten times (single player only)

Dismember 25 Necromorph Limbs (single player only)

Kill 30 enemies with the Ripper

Kill 30 enemies with the Flamethrower

Kill 30 enemies with the Contact Beam