Cheat Codes Discovered In Sonic Mania Plus - Siliconera

It turns out that Sonic Mania Plus has hidden cheat codes that are usable through the level select menu, including making Sonic have all three special moves, infinite continues, and disabling Super Sonic music.

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Sonic Mania Cheats: how to reach level select and sound test!

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Incredibly Well-Hidden Sonic Mania Cheat Codes Discovered In-Game