Steam Workshop::Green Hill Zone Act 1

Steam Workshop::Green Hill Zone - Sonic the Hedgehog

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

SFM-Gmod Green Hill Zone Map

10 Great Sonic Mods in the Steam Workshop

Steam Workshop::Sonic The Hedgehog - Green Hill Zone

Steam Workshop::Green Hill Zone Act 1

Green Hill Act 1 [Sonic CD (2011)] [Mods]

Green Hill Zone in Sonic Superstars

Green Hill Act 1 [Sonic CD (2011)] [Mods]