Complete Story Mode on any difficulty level.

Complete 'Air Strike' on any difficulty.

Kill 5 enemies while downed before successfully recovering.

Complete 'A Thousand Cuts' on any difficulty.

Get 5 headshots in a row using the same clip.

Complete 'Laying Low' on any difficulty.

Kill 6 enemies in a row with a shotgun - all of them as one shot kills.

Kill 10 enemies with exploding canisters.

Complete a match in Competitive Co-Op mode. (Online co-op only)

Open all doors in the map. (Map Pack 3 only)

Use the Monkey Bomb. (Map Pack 3 only)

Complete a Co-Op mission without dying.

Complete a Co-Op mission.