Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.

Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.

Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.

Kill 2 enemies with a single bullet in Single Player or Special Ops.

Help train the local militia.

Complete Mission on any difficulty: Nurse's Office

Kill yourself 5 times.

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with headshots

Defeat 75 enemies in a row without dying

Defeat 20 enemies with hand-to-hand combat

Collect 25% of the journal intelligence found throughout the game.