Complete 'Semper Fi' on any difficulty. (Solo only)

Defeat 50 enemies with the Dragon Sniper

Defeat 50 enemies with hand-to-hand combat

Finish the game in Easy Mode

Defeat 20 enemies with a single punch, after softening them up with gunfire

Defeat three enemies with one explosion

Defeat 30 enemies with Mk-NDI grenades

Defeat 70 enemies with the FAL

Defeat 20 enemies with headshots

Defeat 20 enemies with the Pistole