Complete Dam level without equipping a weapon on person (mounted weapons are allowed).

Complete Treehouse without dying.

Complete the game in Hard or Realistic difficulty.

Defeat Krieger.

Complete a level with full health and armor.

Complete Training mission.

Complete Steam Mission.

Complete Swamp Mission.

Run over 5 enemies while driving a vehicle.

Get a headshot kill from 500m.

In Bunker, make the Mercs and the caged Trigens mingle with each other