Find all notes and artifacts

Find all Firefly pendants

While in stealth, turn off the spotlight generator in Pittsburgh

Upgrade and then break one of every melee weapon

Leave Ellie hanging after a job well done

Play the Jak X game in Left Behind

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

Win the brick throwing contest

Collect all comics

Find all workbench tools

Find all training manuals

Open all safes

Craft every item