Sonic 1 Steam ROM + Sonic 2 Steam ROM + Sonic CD 2011 + Sonic 3

Since Sega decided to delist all versions of Sonic 1, 2, CD, 3 and Sonic & Knuckles from every digital store because of the upcoming release of Sonic

Review: Sonic Origins is a tragic example of good classics ruined by greed

Sonic CD Restored - 30th Anniversary Edition [Sonic CD (2011)] [Mods]

Sonic Spinball - Wikipedia

Sonic's Ultimate Genesis Collection - Wikipedia

Sonic the Hedgehog CD (Video Game) - TV Tropes

Sonic Goes To Hell In This Devilish New Hack For Sonic 3 & Knuckles

Sonic the Hedgehog 2, Sonic Wiki Zone

Sonic Generations (Video Game) - TV Tropes

Switch Versions Of Sonic 1 And 2 Are Safe As SEGA Plans To Delist Classic Games