Cheat Codes discovered in Sonic Mania Plus : r/SonicTheHedgehog

Sonic Mania

Steam Community :: Guide :: Sonic Mania Plus Secrets & Cheat Codes

Sonic Mania, A Gamer's Cheat Codes Wiki

Steam Community :: Guide :: Sonic Mania Plus Secrets & Cheat Codes

Sonic Mania, Sonic Wiki Zone

Sonic Mania Plus Reviews, Cheats, Tips, and Tricks - Cheat Code Central

Proto:Sonic the Hedgehog 3 - The Cutting Room Floor

The 12 new Game Gear games in Sonic Origins Plus expansion sound weird, according to early reports

Sonic Mania & Sonic Mania Plus, Switch