Sonic 3 A.I.R.

Sonic 3 A.I.R. (Angel Island Revisited) is a fan‑made widescreen remaster of the original Sonic 3 & Knuckles game. It runs the original ROM supplied by the user—such as the version available on Steam—and provides an open‑source codebase that reproduces the gameplay with modern display support. The project distributes the game executable together with its scripts, while the remastered soundtrack must be downloaded from the in‑game options menu.

The remaster is available for Windows, Linux, macOS, Android, iOS and Web, each requiring the user to supply a compatible Sonic 3 & Knuckles ROM. The macOS port is maintained by Sappharad, and the Android and iOS builds follow a similar process of transferring the ROM to the device. All releases are tagged as stable, with the latest update dated March 2026.

Developers and fans who own the original game can use Sonic 3 A.I.R. to experience the title in widescreen format and explore the open‑source implementation. The project’s source code, documentation, and community support are hosted on GitHub and a Discord server.