This is widely considered by the gaming community to be the definitive way to experience the game. Sonic 3 A.I.R. is a massive fan-made source port built from the ground up for modern hardware.
Play Sonic 3 & Knuckles: Safe and Legal Ways to Enjoy the Classic sonic 3 and knuckles steam rom download best free
It supports modern gamepads, allows for custom mods, fixes bugs, and feels like a modern native PC game while keeping the exact gameplay feel of the 1994 classic. This is widely considered by the gaming community
What are you using? (Windows, Mac, Steam Deck?) Play Sonic 3 & Knuckles: Safe and Legal
However, Sega delisted the standalone classic versions from Steam to clear the way for Sonic Origins . While you can no longer buy the raw Genesis ROM directly on Steam, players who purchased it before the delisting can still access it in their libraries. The Ultimate Modern Way: Sonic Origins