Steam Workshop::Green Hill Zone V2

SonicGDK Windows, Mac game - IndieDB

Shadow Mania Plus (v2.0 Update) ✪ Full Game Playthrough (1080p/60fps)

SonicGDK Windows, Mac game - IndieDB

Sonic Origins on Steam

Sonic Origins Review - A Potent Pack Of Nostalgia - Game Informer

Steam Workshop::[TTT] ttt_GreenHillZone

Team Fortress 2 - Wikipedia

Steam Workshop::Green Hill Zone

Steam Workshop::Green Hill Zone V3

I made Green Hill Zone in note blocks for my friend's Minecraft recreation of Sonic The Hedgehog (1991) : r/SonicTheHedgehog