Unlock the Joe Cool Costume

Sleep with another player (group sleep)

Have a second player activate a Woodstock trigger

Complete all Lunar Surface levels

Unlock the Masked Marvel Costume

Hover as normal Snoopy for more than 5 seconds

Jump on three enemies without touching the ground

Complete all Peppermint Jungle levels

Finish a level

Go back to the big city

Leave in the RV

Help Angie by delivering the moviebox

Talk to Andy the detectorist