Find all the hidden Golden Spatulas in Bikini Bottom.

Clear all the Ski slopes in Sand Mountain

Engage in all optional conversations

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

Pick up Frank's note after it's discarded

Find all Firefly pendants

Fully upgrade a weapon

Pet Buckley the dog

While in stealth, turn off the spotlight generator in Pittsburgh

Craft every item