Spend 8 seconds or more in the air

Defeat 1000 enemies.

Defeat at least 200 enemies using interactive objects.

Defeat the Twins simultaneously.

Defeat an enemy by throwing an object at him while he’s already down.

Collect 1,000,000 points over all levels you have played

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

Collect 50% of the prize bubbles on the story levels

Kill 500 enemies with any rifle, repeater, or shotgun in any game mode.

Complete "And the Truth Will Set You Free".

Complete "An Appointed Time".

Complete Episode 1 Chapter 0-A.

Complete "The Assault on Fort Mercer".