Complete the game in Hard or Realistic difficulty.

Kill the Traitor with a melee attack.

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

Complete Swamp Mission.

Complete a mission using only melee attacks

While in Guerrilla mode, complete an infiltration sequence without being detected

Complete Level 3 in any difficulty mode

Complete any Level, in any difficulty, in a 4-player co-op game

Kill Crowe with a headshot.

Complete the game on Regular difficulty

Finish Rocket

Complete the Russian Missions

Complete Oder River Country (Day)