Cheat Codes discovered in Sonic Mania Plus : r/SonicTheHedgehog

How to get Super Sonic - The classic Sonic the Hedgehog 2 cheat

All Sonic Origins Cheat Codes

Sonic the Hedgehog 3/Hidden content - Sonic Retro

Tails' Channel, celebrating 15 years on X: A number of Sonic 3 & Knuckles soundtest features were added in the latest update. @TheOcelot01 recapped all the codes in the list below. #SonicNews

Sonic 3 & Knuckles - The Cutting Room Floor

Sonic 3 Complete - The Independent Video Game Community

15 Best Video Game Cheat Codes of All-Time

Sonic Origins - How to Enter Level Select, Sound Test, Debug

Sonic the Hedgehog (Prototype) - Hidden Palace

Sonic Mania Cheats: Level Select Code, How to Collect Chaos