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

Win the brick throwing contest

Complete Part 1

Find all Firefly pendants

Find all training manuals

Upgrade and then break one of every melee weapon

Leave Ellie hanging after a job well done

Fully upgrade a weapon

Craft every item

Pick up Frank's note after it's discarded