Defeat 50 enemies with the M32 - Hammer

Defeat 70 enemies with the M4

Defeat 50 enemies with stealth attacks

Defeat 20 enemies with gunfire by aiming while hanging

Find ten treasures

Defeat 50 enemies with hand-to-hand combat

Defeat three enemies with one explosion

Defeat 20 enemies with headshots

Complete one Cooperative Multiplayer game

Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

Activate the Fly Trap. (Map Pack 3 only)

Upgrade any weapon in Pack A Punch. (Map Pack 3 only)