Sonic-mania-game | 2026 Update |

: Internally, the Lava Reef Zone boss area is referred to as "Act 3," and a corresponding title card sprite exists, suggesting some zones were originally planned to have more than two acts. Unused Objects :

: An early draft suggested a different start for Dr. Eggman. Instead of his active pursuit of the Phantom Ruby, he would have begun the game depressed in his bedroom until the Hard Boiled Heavies went rogue, angering him enough to return to villainy. sonic-mania-game

: A matchmaking roulette game cut from Studiopolis. : Internally, the Lava Reef Zone boss area

contains several unused assets, including bouncing newspaper stacks and printing machines labeled "Sega SP500" as a potential nod to the SG-1000. sonic-mania-game