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

Get hand picked for Shepherd's elite squad.

Finish the game in Normal Mode

Help train the local militia.

Defeat 100 enemies with headshots

Defeat 70 enemies with the FAL

Defeat 50 enemies with the 92FS - 9mm

Defeat 50 enemies with hand-to-hand combat

Defeat 30 enemies with Mk-NDI grenades

Defeat 20 enemies with hand-to-hand combat

You killed 5 opposing team members.

You killed a Rockstar in multiplayer.