Use 6 or more Healing fountains in a single run

Reach Chapter 3

Select an Ultimate ability during a game

Complete Left Behind

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

Collect all comics

Break into every locked door using shivs

Find all workbenches

Ride the sewer contraption with Henry and Sam