The Emerald Hill Zone is a region consisting mostly of trees, rectangular shaped rocks, grass, and water.
After defeating Dr. Eggman and his assistant, Dr. Julian Snively, at their base on South Island, Sonic the Hedgehog chased the two mad doctors down to Westside Island, where he teamed up with his new sidekick and best buddy Miles "Tails" Prower as well as the Knothole Freedom Fighters. Emerald Hill Zone was the first Zone they passed through in their efforts to defeat the mad doctors, whose goal on Westside Island was major construction and refinements as part of their plan for world domination. From here, they chased them down to Chemical Plant Zone. (VG: StH2, SSD: #12)
- The Emerald Hill Zone was originally in the second Sonic the Hedgehog game. While unnamed in the comic, the zone's design is based on that of Emerald Hill Zone from the game and is considered the official name of this zone until further notice.