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

Sonic Mania Cheats & Cheat Codes for PC, PS4, Xbox One, and Nintendo Switch - Cheat Code Central

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

I dunno if you guys noticed, but Sonic CD's depot was silently updated and now it shows Linux support : r/linux_gaming

Sonic the Hedgehog 2 - Wikipedia

Steam Community :: Sonic CD

Sonic the Hedgehog CD (2011)

Sonic Origins (for PC) Review

Why is nobody talking about Knuckles now (officially) being able to be played in Sonic CD? (Sonic Origins Plus) : r/SonicTheHedgehog

Sonic Compilations and the Origins of Sonic Origins