Leave Ellie hanging after a job well done

Find all Firefly pendants

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

Complete Part 1

Break into every locked door using shivs

Find all training manuals

Upgrade and then break one of every melee weapon

Open all safes

Ride the sewer contraption with Henry and Sam

Create a new mission using the UGC level editor.