Use the Grim Reaper to destroy the MG emplacement.

Escape the Past.

Retrieve the dossier and the defector from Hue City.

Break the siege in the battle of Khe Sanh.

Defeat 100 enemies with headshots

Defeat 50 enemies with hand-to-hand combat

Defeat three enemies with one explosion

Defeat 20 enemies with hand-to-hand combat

Break free from the torture chair.

Receive orders from Lancer.

Destroy all enemies on vehicles during the prison break.

Kill a Juggernaut in Special Ops.

Kill 10 enemies in a row using akimbo weapons in Single Player or Special Ops.