Sonic Chaos (May 17, 1993 prototype) - Hidden Palace

A prototype of Sonic Chaos (also known as Sonic & Tails in Japan) for the Sega Game Gear.

Sonic Chaos (Jun 30, 1993 prototype) - Hidden Palace

Proto:Sonic Chaos (Game Gear)/May 17, 1993 - The Cutting Room Floor

Sonic the Hedgehog/History and appearances (1991 - 2006)

Sonic Chaos (Jun 30, 1993 prototype)

Proto:Sonic Chaos (Game Gear)/May 17, 1993 - The Cutting Room Floor

Sonic Chaos (June 30, 1993 Prototype) :: First Look Gameplay (720p

Sonic 3 Prototype Uncovered by Hidden Palace

Proto:Sonic Chaos (Game Gear)/May 17, 1993 - The Cutting Room Floor

sonic the hedgehog 2 « SEGADriven

Sonic the Hedgehog CD (May 12, 1993 prototype) - Hidden Palace

Doctor Eggman, Sonic Wiki Zone

Sonic Prototypes (released by Hidden Palace)

Proto:Sonic Chaos (Game Gear)/May 17, 1993 - The Cutting Room Floor

Sonic CD - Wikipedia