South Island

From Sonic Retro

This page is about South Island as a storyline location. See South Island (Sonic the Fighters) for the stage named after it.
A map of South Island in Sonic the Hedgehog (8-bit).

South Island (サウスアイランド)Media:Sonic1 MD JP manual.pdf[1] is an island which featured prominently in the early Sonic the Hedgehog games, especially in 8-bit outings. It is located somewhere in the Pacific, however it cannot be located on any map due to the island's habit of drifting across the ocean.Media:Sonic1 MD JP manual.pdf[1]

South Island first appeared in Sonic the Hedgehog for the Sega Mega Drive, and later appeared in Sonic the Hedgehog, Sonic the Hedgehog 2, and Sonic Chaos for the Sega Game Gear and Sega Master System. Its next appearance was in Sonic the Fighters, an arcade game. Its newest depiction to date was in Sonic Forces, where a deserted rendition of the Green Hill Zone is the first level, as well as the sixth, eighth and sixteenth level.

Game appearances

Sonic the Hedgehog (16-bit)

In Sonic the Hedgehog, Sonic finds that the evil Dr. Eggman built a base on the island and turned the local residents into robots to aid in his search for the legendary Chaos Emeralds. The heroic hedgehog collects the Emeralds first, stops Eggman and chases him off the island.


Sonic the Hedgehog (8-bit)

Close-up of the island's industrialised summit.

The story in the 8-bit Sonic the Hedgehog is the same as in the 16-bit one, and the games most likely depict the same adventure.


Sonic the Hedgehog 2 (8-bit)

In Sonic the Hedgehog 2, Eggman returns and kidnaps all the inhabitants, along with Miles "Tails" Prower, demanding a ransom of six Chaos Emeralds to return them. Sonic goes out to stop him once again, and succeeds.


  • Under Ground Zone, a volcanic mountain, once used as a mine.
  • Sky High Zone, the top of a mountain that reaches the clouds.
  • Aqua Lake Zone, a lake surrounded by fountains and pillars.
  • Green Hills Zone, very like the one from the previous games, but with normal trees instead of palm trees.
  • Gimmick Mt. Zone, one of Robotnik's metallic bases, apparently set inside a mountain.
  • Scrambled Egg Zone, a mountain filled with large pipes, and another of Robotnik's bases.
  • Crystal Egg Zone, a transparent crystal base of Robotnik's. Can only be accessed if you have all six Chaos Emeralds.

Sonic Chaos

In Sonic Chaos, Eggman steals one of the Chaos Emeralds on South Island and as a result, the rest of the Emeralds become unbalanced and cause the island to slowly sink into the ocean.Media:Sonic Chaos Game Gear JP Manual.pdf[2]Media:SonicChaos GG US manual.pdf[3] However, Sonic recovers all the Emeralds and saves the island.


  • Turquoise Hill Zone, a grassy hillside area, much like Green Hill Zone.
  • Gigalopolis Zone, a sprawling urban area with various passages. The Game Gear version spells it as "Gigapolis Zone".
  • Sleeping Egg Zone, a mostly flat region of plains, with Eggman's self-portrait adorning parts of the background.
  • Mecha Green Hill Zone, Robotnik's version of the Green Hill Zone, with deathtraps strewn everywhere.
  • Aqua Planet Zone, a group of ruins partially submerged in water. Despite the name, there is actually very little water.
  • Electric Egg Zone, another of Robotnik's many large bases.

Sonic the Fighters

Main article: South Island (Sonic the Fighters)

In Sonic the Fighters, South Island is one of the battle arenas. It is the very first arena in story mode, and is where the player character faces Knuckles the Echidna. The arena is set on a small island plateau, in an area that looks mostly like the Green Hill Zone.

Sonic Adventure 2

In Sonic Adventure 2 and its GameCube remake, Sonic Adventure 2: Battle, Green Hill Zone was a secret stage that could be unlocked by obtaining all 180 Emblems. On the Stage Select screen, the icon for Green Hill could be found on a secluded island, presumably South Island.

Sonic Mania

In Sonic Mania, Sonic, Tails and Knuckles are teleported to the Green Hill Zone due to a reaction from the Phantom Ruby.

Sonic Forces

A few levels in Sonic Forces involve Sonic and/or the Avatar running through a completely trashed Green Hill Zone, which was turned into a pseudo-desert due to Eggman taking over a very large chunk of the world.



Locations in the Sonic the Hedgehog Game Series
Islands   Christmas Island | South Island | West Side Island | Angel Island | Cocoa Island | Flicky Island | Prison Island | Onyx Island | Southern Island
Landmarks   Never Lake | Mt. Mobius | Emerald Shrine | Tails' Workshop | Babylon Garden | Gaia Gate
Regions / Nations   Eggman Empire | Station Square | Mystic Ruins | United Federation | Central City | Soleanna | Monopole | City | Mystic Jungle
Vessels   Death Egg | Death Egg II | Egg Carrier | Space Colony ARK | Eggman Fleet
Planets / Planetoids   Mobius | Little Planet | Black Comet | Interstellar Amusement Park | Lost Hex
Dimensions   Special Stage | Maginaryworld | Sol Dimension | Arabian Nights | Twilight Cage | Grand Kingdom | White Space