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.

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

Early Sonic 3 prototype found, features major differences to the

Sonic the Hedgehog (1991) prototype discovered

Sonic 3 Prototype With Lost Content Discovered - SEGA Online Emulator

sonic the hedgehog 2 « SEGADriven

Sonic Origins, Sonic Wiki Zone

Sonic the Hedgehog (1991) prototype discovered

Sonic The Hedgehog Prototype Finally Discovered - Gameranx

A Sonic 1 Prototype for the Sega Mega Drive Has Been Found After

GG) Sonic 2 Auto Demo Prototype (1991-12-05) - Info & Download

7 Sonic The Hedgehog Prototypes You Were Never Meant To Play

21 Crazy Facts About Sonic and the Console War He Started - IGN

Sonic the Hedgehog (Prototype), Page 13

Prototype » SEGAbits - #1 Source for SEGA News

sega genesis RetroRGB - Part 2