New Sonic the Hedgehog (1991) prototype uncovered by preservation

A prototype of Sonic the Hedgehog (1991) was showcased by a video game preservation group in a New Year's Eve livestream.

7 Sonic The Hedgehog Prototypes You Were Never Meant To Play

Speedin' Through — New Sonic 1 prototype uncovered by preservation

Sonic The Hedgehog Prototype Finally Discovered - Gameranx

Custom / Edited - Sonic the Hedgehog Customs - Sonic 1 (Tokyo Toy

Prototype » SEGAbits - #1 Source for SEGA News

Sonic the Hedgehog Movie

Sonic the Hedgehog (lost Tokyo Toy Show prototype build of Sega

Origins of the Sonic 1 water effect revealed

Sonic 3 Prototype With Lost Content Discovered

7 Sonic The Hedgehog Prototypes You Were Never Meant To Play