Sonic-mania-game Guide

: The game’s original working title was Sonic Discovery . Graphics for an early title screen with this name remain hidden within the game’s data.

: Unused text for "Hyper" and sprites for Super Emeralds indicate that Hyper Sonic, Tails, and Knuckles transformations were at one point considered, possibly tied to collecting emeralds in bonus stages. Cut Gameplay & Zones Unused Bosses : sonic-mania-game

: 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. : The game’s original working title was Sonic Discovery