Pick up 30 things that don't belong to you

Try to wash the dirty car with the brush

Get all six novelty items

Try to mix the decaf and caffeinated coffees

Cook the hamster in Maniac Mansion (Don't try this at home, kids!)

Try to swap the textbook with the stamp album

Try to mix the disappearing ink with Booboo-B-Gone

Close a door

Find Fred's basement workshop

Reach Assault Rank 2 in multiplayer

Complete all challenges in the campaign

Unlock all Codex Entries in Friends in High Places