We strongly recommend that you buy the game so you can support the developershttps://store.steampowered.com/app/584400/Sonic_Mania/
WHAT IS SONIC MANIA
Sonic Mania is an all-new adventure with Sonic, Tails, and Knuckles full of unique bosses, rolling 2D landscapes, and fun classic gameplay.
HOW DO I INSTALL SONIC MANIA ?
1. Click the green UploadHub button and you should be redirected to the Download.
2. Once SONIC MANIA is finished downloading, extract the .rar file. (You will need WinRar, you can get it here
3. Once its extracted, go into the games folder and right click the game and run it as administrator and Enjoy!