Green Hill Zone

Green Hill Zone (also known as Green Hill) is an area on South Island and is the first level in the game Sonic the Hedgehog. Throughout the Sonic the Hedgehog series it has made numerous appearances in many games, including Sonic Adventure 2, Sonic Battle and Sonic Generations. In other games in the series, various levels including Emerald Hill Zone from Sonic the Hedgehog 2 and Seaside Hill from Sonic Heroes are based off Green Hill Zone, having the same kind of green grass and checkered soil.

The Green Hill Zone however also has made an appearance in Mario & Sonic at the Olympic Games. In the "Gallery" section of the game, one of the two backgrounds for the Count Master mini-game is the Green Hill Zone. The other background is a background of the Mushroom Kingdom from New Super Mario Bros.. The Green Hill Zone appeared in the second, fourth and final level of the Count Master game. The background music of the Green Hill Zone can be optionably be heard in the game, once it has been unlocked.

The Green Hill Zone also appears in Super Smash Bros. Brawl as a unlockable stage. It is automatically unlocked when the player unlocks Sonic the Hedgehog. In the stage background, Miles "Tails" Prower, Knuckles the Echidna, and Silver the Hedgehog often appear running around the loop. If the terrain is attacked too often, a section of it will collapse, but it can eventually repair itself.

Green Hill Zone appears in Mario & Sonic at the Olympic Winter Games as a background in Dream Figure Skating for Sonic's world.