The secrets never stop in Sonic Mania Plus. Access Sound Test Mode, and you can actually activate some crazy, cool cheat codes. Here’s how it works. Sonic Mania Plus is just full of mysteries, and now ...

This page contains a list of cheats, codes, Easter eggs, tips, and other secrets for Sonic CD for Sega CD. If you've discovered a cheat you'd like to add to the page, or have a correction, please ...

This page contains a list of cheats, codes, Easter eggs, tips, and other secrets for Sonic CD for PlayStation 3. If you've discovered a cheat you'd like to add to the page, or have a correction, ...