S2Beta:Prototype Zones/Neo Green Hill - Sonic Retro

Sonic Mania - The Cutting Room Floor

Sonic The Hedgehog Sprite Sheets - Sega Genesis - Sonic Galaxy.net

Steam Workshop::Green Hill Zone

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

ArtStation - Green Hill 3D Redesign

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

Custom Green Hill Sprites [Outdated] by FuzzysArting on DeviantArt

Game Boy Advance - Sonic Battle - Green Hill Zone - The Spriters Resource

Neo Green Hill In Sonic Mania [Sonic Mania] [Works In Progress]

S2Beta:Prototype Zones/Emerald Hill - Sonic Retro