Master System - Sonic Chaos - Sans notice - EUR

CryptoPunkets #573 - CryptoPunkets

Alex plays (almost) every Sonic the Hedgehog game - #4: Sonic the Hedgehog 2 (SEGA Master System, 1992) - General Gaming - Serenes Forest Forums

Who would win, Sonic.exe or Sonic? - Quora

EURO-FESTIVAL Project Arts Festivals and European Public Culture

Sonic the Hedgehog 2 (1992)

CryptoPunkets #13 - CryptoPunkets

Sonic the Hedgehog 2, Sonic Wiki Zone

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

Dr. Robotnik – Wizard Dojo

Sonic Chaos Intro Theme (SEGA Master System) ✓

References - Granular Media

Alex plays (almost) every Sonic the Hedgehog game - #4: Sonic the Hedgehog 2 (SEGA Master System, 1992) - General Gaming - Serenes Forest Forums