Clear all seven worlds, collect 120 regular stars and return for all 120 Green Stars. Every galaxy chapter combines the normal missions, its Comet Medal and numbered Green Star routes. Finish both Grandmaster missions to reach 242 stars.
Choose a world below. Green Stars unlock after the full regular-star collection and another Bowser clear; they are included inside each galaxy chapter.
World 1
- Sky Station Galaxy
- Yoshi Star Galaxy
- Spin-Dig Galaxy
- Fluffy Bluff Galaxy
- Flip-Swap Galaxy
- Rightside Down Galaxy
- Bowser Jr.'s Fiery Flotilla
World 2
- Puzzle Plank Galaxy
- Boulder Bowl Galaxy
- Cosmic Cove Galaxy
- Hightail Falls Galaxy
- Honeybloom Galaxy
- Wild Glide Galaxy
- Bowser's Lava Lair
World 3
- Tall Trunk Galaxy
- Cloudy Court Galaxy
- Haunty Halls Galaxy
- Freezy Flake Galaxy
- Rolling Masterpiece Galaxy
- Beat Block Galaxy
- Bowser Jr.'s Fearsome Fleet
World 4
- Supermassive Galaxy
- Flipsville Galaxy
- Starshine Beach Galaxy
- Chompworks Galaxy
- Sweet Mystery Galaxy
- Honeyhop Galaxy
- Bowser's Gravity Gauntlet
World 5
- Space Storm Galaxy
- Slipsand Galaxy
- Shiverburn Galaxy
- Boo Moon Galaxy
- Upside Dizzy Galaxy
- Fleet Glide Galaxy
- Bowser Jr.'s Boom Bunker
World 6
- Melty Monster Galaxy
- Clockwork Ruins Galaxy
- Throwback Galaxy
- Battle Belt Galaxy
- Flash Black Galaxy
- Slimy Spring Galaxy
- Bowser's Galaxy Generator
World S
- Mario Squared Galaxy
- Rolling Coaster Galaxy
- Twisty Trials Galaxy
- Stone Cyclone Galaxy
- Boss Blitz Galaxy
- Flip-Out Galaxy
- Grandmaster Galaxy