S2Beta:Prototype Zones/Neo Green Hill - Sonic Retro

Sonic Advance 3 Sprite Sheets - Game Boy Advance - Sonic Galaxy.net

Green Hill Zone, Map of the Sonic the Hedgehog video game universe Wiki

Steam Workshop::Sonic 1 - Green Hill Zone

Green Hill Zone Tileset by supersonic1009 on DeviantArt

Sonic in Green Hill Zone [Sprite Animation/2K Special]

Custom Green Hill Sprites [Outdated] by FuzzysArting on DeviantArt

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

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 Mania Sprites Sonic Amino PT~BR© Amino

Sonic Platformer Game