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 1 and 2 Mobile Remasters Are Now on PC

Sonic 1 Steam ROM + Sonic 2 Steam ROM + Sonic CD 2011 + Sonic 3 & Knuckles Steam ROM : SEGA : Free Download, Borrow, and Streaming : Internet Archive

Release][N3DS] Sonic 1 & 2 (2013) Decompilation port

Sonic the Hedgehog 3 - Wikiwand

Sonic CD's Japanese Soundtrack Fuels Style and Substance, by Brandon Johnson, SUPERJUMP

The 10 Best Sonic Games - IGN

What's your favorite versions of Sonic 1, 2, 3, K, and CD? And yes, ROM hacks can count as your favorite versions. - Games - Sonic Stadium

Reviews: Sonic Mania - IMDb

What's your favorite versions of Sonic 1, 2, 3, K, and CD? And yes, ROM hacks can count as your favorite versions. - Games - Sonic Stadium

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

Review: Sonic CD – Destructoid

Sonic Frontiers (Video Game) - TV Tropes

Sonic Origins Spin Dashes To The Latest Platforms Next Year

Sega confirms Sonic 3 won't have its original music in Sonic Origins. Here's what will be missing, and why

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