Charmed Ridge: Defeat a giant

Spike's Arena: Defeat Spike

Bamboo Terrace: Follow the question mark bottles to the end

Enchanted Towers: Destroy all the balloons

Sgt. Byrd's Base: As Sgt. Byrd, bomb all treasure chests

Buzz's Dungeon: Defeat Buzz

Seashell Shore: Defeat Bluto's nuclear shark submarine

Defeat the nine Valkyries

Use treasure maps to find all of the dig spots

Retrieve all treasure from the Workshop’s center chamber

Fully upgrade your Health

Complete all of the Trials of Muspelheim

Spread the ashes