S1MD Green Hill Zone tilesets in S1MDMS style by HidroGeniuns on DeviantArt

Sonic 1 HD: Green Hill Zone by Hyperchaotix on DeviantArt

Sonic the Hedgehog - Green Hill Zone by SonicDash57 on DeviantArt

Green Hill Re-Imagined Sprites by Exclipsy on DeviantArt

The Spriters Resource - Full Sheet View - Sonic the Hedgehog (Prototype) - Green Hill Zone Act. 1 (Normal)

Green Hills Zone Sprites by Alex13Art on DeviantArt

MlKE on X: My own Green Hill Zone Mock up (I know its overdone shhh) #pixelart #sonic #fanart #art #aseprite #gamedev This took a surprising amount of hours. / X

Sonic The Hedgeblog — In early 'Sonic 1′ screenshots the Green Hill Zone

Sonic Mania Sprites Sonic Amino PT~BR© Amino

Imgur: The magic of the Internet

Sonic Platformer Game