Sonic Retro - Second only to Sega

DF Retro: Sonic CD - under-appreciated but still brilliant today

Every Sonic The Hedgehog game ever and in what order to play them - Meristation

Sonic the Hedgehog (Sega Genesis, 1991) for sale online

Sonic Superstars - Wikipedia

Sonic Retro

Sonic Hacking Contest :: The SHC2022 Contest :: Sonic the Hedgehog Vintage - 2022 Demonstration :: By ZachmanAwesomeness

Sonic Superstars

Sonic the Hedgehog : Unknown: Video Games

Sonic the Hedgehog CD (Mega-CD prototype; 1993-05-10) - Sonic Retro

All Sonic The Hedgehog 2 (16-bit) Sega Vintage Collection Xbox Live Arcade Achievements/PSN Trophies

Sonic 2 Retro Remix - Sonic Retro