Win the Silver Tourament.

Get hand picked for Shepherd's elite squad.

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

Won an AI stage battle - any difficulty

Completed "Welcome to the Age of Metal"

Defeat ten enemies with grenades by aiming while hanging

Defeat 50 enemies with the M32 - Hammer

Defeat 70 enemies with the FAL

Defeat 30 enemies with the Desert - 5

Finish the game in Normal Mode

Defeat 50 enemies with the 92FS - 9mm

Defeat 30 enemies with Mk-NDI grenades

Defeat 70 enemies with the M4