Play Super Boss Collection Online

Summary

Super Boss Collection is a fan‑made ROM hack that lets you square off against a staggering roster of 77 bosses. Every classic Super Mario World foe makes an appearance, and the lineup is padded with enemies ripped from other franchises as well as original creations contributed by the community. The result feels like a crossover arena where you can test your platforming chops against familiar faces and totally unexpected adversaries, all in one continuous run. The project was put together by Brazilian hacker @greenjerry, who stitched together assets from multiple games and encouraged other users to add their own boss designs. It’s a love letter to retro boss battles, offering endless replay value for anyone who enjoys a good challenge.