Sonic Mania - The Cutting Room Floor

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

Sprites and Hoaxes – Shauniversal Studios

Sam Ryall Animation: Green Hill Zone. Act 1

ArtStation - A Enhanced Version of Green Hill Zone

Sega Genesis / 32X - Sonic the Hedgehog - Green Hill Zone Objects - The Spriters Resource

Custom / Edited - Sonic the Hedgehog Customs - Green Hill Zone - The Spriters Resource

Green Hill Zone Tileset by supersonic1009 on DeviantArt

User blog:SalaComMander/SalaComMander's first sprite comic, Sonic Wiki Zone

Sonic 1 green hill zone sprites

Robot Game Design – Pixel art sprite art style mood boards – My work!