Completed the sniping section in Shore Leave without missing a shot

Killed 25 enemies while using peek and lean during the Campaign

Completed Through the Eyes of Evil

Requested ammo from an Ally in the Campaign

Knock off every Tripod during the Elevator Sequence

Knock down an enemy with Contact Beam Alt-Fire then kill it with Primary Fire before it stands up

Kill 20 enemies with Detonator Mines in a deployed state

Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)

Complete the game on Zealot setting

Dismember 2,500 Necromorph Limbs (single player only)

Kill a Stalker with the Seeker Rifle while in Zoom Mode

Decompress 20 Necromorphs without getting sucked out yourself