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

Finish the game in Easy Mode

Defeat 70 enemies with the M4

Defeat 30 enemies with Mk-NDI grenades

Defeat 20 enemies with the Pistole

Defeat 20 enemies with gunfire by aiming while hanging

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with hand-to-hand combat

Find one treasure

Use the Monkey Bomb. (Map Pack 3 only)

Score from a corner

Repair 200 window boards in a single game. (Map Pack 2 only)

Destroy 10 Military Bases or Infected Hives in New York City.