Sonic Chaos (Master System prototype; 1993-07-13)/Hidden content - Sonic Retro

Sonic the Hedgehog 3 (prototype; 1993-11-03)/Hidden content - Sonic Retro

Sonic Chaos (May 17, 1993 prototype)

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

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

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

Sonic Chaos (Master System prototype; 1993-07-13)/Comparisons - Sonic Retro

Sonic Retro:Anniversaries/July - Sonic Retro

Sonic Chaos/Hidden content - Sonic Retro

Sonic Chaos (Master System prototype; 1993-07-13)/Comparisons - Sonic Retro

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

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

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

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

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

Unreleased Prototypes of Sonic 2 and Sonic Chaos Dumped by Hidden Palace « SEGADriven