Zone: 0 > Sonic 1 > Background Information

Sonic 1 levels [Sonic 3 A.I.R.] [Projects]

Sonic The Hedgehog Classic on the App Store

Proto:Sonic the Hedgehog (Genesis)/Green Hill Zone - The Cutting Room Floor

Green Hill Zone (Sonic the Hedgehog), Sonic Wiki Zone

Sonic the Hedgehog [1991] - IGN

Sonic Superstars recaptures the magic of 16-bit Sonic - but it's not a perfect return to form

Sonic Frontiers has traditional 2D and 3D Sonic levels, too - Polygon

Sonic The Hedgehog Box Shot for Linux - GameFAQs

Sonic The Hedgeblog on X: 'Sonic 1 Reverse Curse' (S1 Decomp Mod) by campbellsonic Sonic has been cursed! Now, when he collects rings, his counter counts DOWN instead of up! And if

Sonic 1 Story/Walkthough

Zone: 0 > Sonic 1 > Downloads

Sonic for the Master System - An Oddball Retrospective! - Indie Hive

Sonic The Hedgeblog on X: Early screenshots of Labyrinth Zone in 'Sonic 1′ had a very different background. With the prototype, we can now see that design in its entirely! Via the @