: Using emulators like RetroArch or Kega Fusion , players can use "Netplay" features to play together or compete in speedruns over the internet.
The developer, Tweaker, has hinted that version is in the works. Leaks from the Sonic Retro forum suggest: sonic megamix 5.0 online
For those who want to experience the game without setting up complex hardware or emulators, several "online" browser-based versions exist. These platforms use web-based emulators to run the Sega CD ISO directly in your browser: : Using emulators like RetroArch or Kega Fusion