Collect all trophies

Find all notes and artifacts

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

Play the Jak X game in Left Behind

Survive all of Ellie's jokes

Find all Firefly pendants

Break into every locked door using shivs

Pet Buckley the dog

Find all workbenches

Upgrade and then break one of every melee weapon

Open all safes

Ride the sewer contraption with Henry and Sam

Craft every item