Green Hills Zone Sprites by Alex13Art on DeviantArt

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

Custom / Edited - Sonic the Hedgehog Customs - Green Hill Zone Background (Modern, Genesis-Style) - The Spriters Resource

ArtStation - Sonic the Hedgehog Diorama Series: Green Hill Zone

ArtStation - Green Hill 3D Redesign

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

Wii - Super Smash Bros. Brawl - Green Hill Zone - The Textures Resource

Custom / Edited - Sonic the Hedgehog Customs - Green Hill Zone Chunks (Prototypes, Sonic Mania-Style) - The Spriters Resource

green hill in simple sonic worlds by chucknick - Game Jolt

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