: Ensure the file is uncompressed. If it is inside a .zip or .7z file, you must extract the .bin file first. Fan Game - Sonic 3 A.I.R. | Page 2

: You must own the original game (e.g., via the Steam store) to legally obtain and use this ROM file.

Do you have any specific questions about the wsonic3bin file or Sonic & Knuckles in general? I'm here to help!

Alternatively, if your question was about , let me know and I'll write that guide instead.