Grumble Comet’s Revenge — free boss rush game starring Grumble Comet

Grumble Comet’s Revenge

Join Grumble Comet in a vibrant boss rush adventure built for quick HTML5 sessions, collectible characters, playful VFX and merch-ready storytelling.

🚧 Coming Soon

About Grumble Comet’s Revenge

Grumble Comet’s Revenge is a free, instant-play HTML5 boss rush game starring Grumble Comet from the The AstroMochi Crew. Play it right in your browser on mobile or desktop — no download, no sign-up, 100% free.

  • Genre: Boss Rush
  • Character: Grumble Comet
  • Universe: The AstroMochi Crew
  • Price: Free to play
  • Platform: Web browser (mobile & desktop)
  • Players: Single player

Merch

Grumble Comet plush, sticker pack, tee, enamel pin and collector card. Shop official Grumble Comet merch.

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