If you use an emulation frontend like RetroBat, Batocera, or EmulationStation, you may need to place the ROM in a specific directory for Sonic 3 A.I.R. to appear as a game.

Purchase or SEGA Mega Drive and Genesis Classics on Steam.

Place your legally acquired Sonic .bin files into that folder.

I can provide the exact step-by-step setup instructions for your specific program.

The Wsonic3.bin file is the digital ROM extract of the Sega Genesis cartridge. In the 1990s, Sega revolutionized gaming by creating a physical cartridge with a "Lock-On" slot on top. Passing data from an underlying game through this slot altered the gameplay entirely.

You can use hardware tools like the Retrode 2 to plug your physical Genesis cartridges into a PC via USB and copy the binary data straight to your drive. Avoiding Malware