You cannot download the full game here. You must own Sonic Mania (preferably on Steam) to patch it.
: Features gameplay with characters including Shadow, Silver, Metal Sonic, and classic series stars. Updated Content sonic mania super plus hyper edition updated download
Since "Sonic Mania: Super Plus Hyper Edition" is a fan project, you won't find it on official storefronts. It's distributed through the community modding scene. Here’s how to get it and install it. You cannot download the full game here
The Mod Loader sometimes overrides Steam Input settings. Updated Content Since "Sonic Mania: Super Plus Hyper
Place downloaded mods into the "mods" folder created by the Mod Loader, select them, and run the game. Unlocking Official "Super" Content (Plus Edition)
Modding can sometimes cause technical hiccups. Use these quick fixes if you encounter problems. Game Crashes on Startup Outdated Mod Loader or conflicting mods.
Playable Mighty , Ray , Amy Rose , and Metal Sonic are now fully integrated into the main campaign with custom animated ending sequences.