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

Steam Community :: Sonic CD

Sonic Generations Collection on Steam

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

Sonic Origins is a masterclass in messing up a classic

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

Sonic Origins Download and Buy Today - Epic Games Store

Sonic the Hedgehog CD, Sonic Wiki Zone

Sonic the Hedgehog CD (Video Game) - TV Tropes

Reviews: Sonic Mania - IMDb

Sonic the Hedgehog 2 - Wikipedia

Sonic 3D Blast - PC : Video Games