Sonic Chaos (Master System prototype; 1993-06-30) - Sonic Retro

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

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

Sonic Chaos (Master System prototype; 1993-06-30)/Comparisons/Turquoise Hill Zone - Sonic Retro

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

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

Sonic Chaos (Prototype) : Free Borrow & Streaming : Internet Archive

Sonic Chaos (Master System prototype; 1993-06-30)/Comparisons/Special Stage - Sonic Retro

Game Gear - Sonic Chaos - Sonic (May 17, 1993 prototype) - The Spriters Resource

Electric Egg Zone - Sonic Retro

US20150204559A1 - Adaptive pattern recognition based controller apparatus and method and human-interface therefore - Google Patents

Sonic Chaos (1993), Master System Game

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

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