I recorded it on Ubuntu, but the steps on Windows should be almost the same.
A note for Linux users: you can use either Wine or Mono to run Mod Loader and other its components, but you'll still have to run it through Wine/Proton to play the game.
Download: https://github.com/OSA413/Sonic4_ModL...
Sonic 4 Modding Discord server: / discord
Want to run Sonic 4: 1 on Linux? Read this guide: https://steamcommunity.com/sharedfile...