Get a Magic Key.

Use bricks or bottles to lure an infected into attacking a human

Win the water gun fight

Play the Jak X game in Left Behind

Survive all of Ellie's jokes

Defeat 100 enemies with Rev Roll.

Clear the Maze Marathon Mode.

Clear all Factory Area Maze Stages.

Get a Gold Crown in every stage.

Collect all Keys.

Play Slots 100 times.

Complete Act 4