For the location in the Archie Comics, see South Island (Archie).

South Island (サウスアイランド Sausu Airando?) is a location in the Sonic the Hedgehog series. It is also the main setting of Sonic the Hedgehog (1991) and has made many appearances in the earlier games. South Island is known to be a trove of gems and ancient ruins, that supposedly shifts along the water due to some connection to the Chaos Emeralds.[1] The island is also inhabited by animals.

Game appearances

Sonic the Hedgehog (1991)

In Sonic the Hedgehog (1991), Sonic goes to the island and finds that the evil Doctor Robotnik built a base on the island and turned the local wildlife into robots.[1] The heroic hedgehog stops Robotnik while collecting the Emeralds. Zones of the game are below:

Sonic the Hedgehog (8-bit)


South Island in 8-bit version of Sonic the Hedgehog.


A close-up map of the island's 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. However, after collecting all the Chaos Emeralds, the pollution cloud caused by Scrap Brain Zone above the South Island is erased by emeralds. Zones of the game are below:

Sonic the Hedgehog 2 (8-bit)

In Sonic the Hedgehog 2, Dr. Robotnik returns and kidnaps all the inhabitants, along with Miles "Tails" Prower, demanding a ransom of six Chaos Emeralds to return them.[2] Sonic goes out to stop him once again and succeeds. The Zones of the game are as follows:

  • 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 Mountain 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 with six Chaos Emeralds.

Sonic Chaos

In Sonic Chaos, Robotnik 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.[3] However, Sonic recovers all the Emeralds and saves the island. Zones of the game are below:

  • 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

Sonicgcps2 003-large

The South Island stage in 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. If the player plays as Knuckles here, the player will fight a shadow Knuckles.

Sonic Blast

In Sonic Blast, Robotnik's latest floating base threatens South Island, so Sonic and Knuckles resolve to take it down.[4] While the location was not specified as South Island in the western storyline, the presence of another version of Green Hill Zone further implies it. Zones of the game are below:

Sonic Adventure 2

In Sonic Adventure 2 and its GameCube re-release, 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 Battle

Sonic Battle features Green Hill as an unlockable arena unrelated to Story Mode. Emerald Town's landscape greatly resembles Green Hill, but whether or not it takes place on the island is not confirmed.

Sonic Chronicles: Dark Brotherhood

In Sonic Chronicles: The Dark Brotherhood, South Island appears here as the western landmass in the first part of the game. In addition to Green Hill Zone and Central City, the Mystic Ruins and the remains of Station Square are also found here.

Sonic Generations

Although South Island itself is not mentioned in Sonic Generations, one of its main locations, Green Hill, makes its reappearance as the first level in this game.

Sonic Runners Adventure

In Sonic Runners Adventure, South Island was the location Sonic traveled to after hearing from Tails that Dr. Eggman was causing trouble there. After finding Tails, Sonic put a stop to Eggman's plan before following Eggman off the island.

Sonic Mania

In Sonic Mania, after meeting the five Eggrobos that were excavating the Phantom Ruby at Angel Island, Sonic, Tails and eventually Knuckles are sent to Green Hill Zone thanks to the power of the Ruby. At the end of the Zone, the character have to fight the Death Egg Robot. After the battle, they encounter the Hard Boiled Heavies, and are immediatly teleported to Chemical Plant Zone.

Sonic Forces

South Island appears in Sonic Forces as the location of Green Hill. Though it is once again not referred to by name, the island appears on the game's world map. The stages Lost ValleyArsenal Pyramid, Green Hill, Guardian Rock all take place on the island, being located in Green Hill. Due to Dr. Eggman's industrial projects, the area has undergone heavy desertification, and Sandworms freely burrow throughout the ground.

In other media

Sonic the Comic

South Island STC

South Island in Sonic the Comic.

In the Sonic the Comic published by Fleetway Editions, South Island is a location on Planet Mobius which hosts a number of prominent Hill-themed Zones, including not only the Green Hill Zone but the Emerald Hill Zone as well. It is also home to the Emerald Hill Folk and the Freedom Fighters.

Sonic the Hedgehog: The Movie

South Island movie

The capital of South Island in Sonic the Hedgehog: The Movie.

In Sonic the Hedgehog: The Movie, South Island, rather than being a single island, is a region in the Land of the Sky on Planet Freedom which is governed by the President. It is made up of many islands suspended in the sky. Sonic the Hedgehog and Tails serves as South Island's defenders, protecting it from Dr. Robotnik's schemes.

Archie Comics

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, South Island is a location on Sonic's World. In the Post-Super Genesis Wave timeline, Sonic the Hedgehog has had many battles with Dr. Eggman and his forces.


  • In Sonic Forces, one can see on the world map that Green Hill covers a significant part of the island, leaving no room for the other zones depicted in the original Sonic the Hedgehog. However, this is likely due to presentation reasons and is not intended to be an accurate map of Sonic's world, much like how the continents in Sonic Unleashed do not match up with world maps from previous games.


  1. 1.0 1.1 Sonic the Hedgehog (Sega Mega Drive) Japanese instruction manual, pg. 7-10.
  2. Sonic the Hedgehog 2 (Game Gear) Japanese instruction manual, pg. 4-5.
  3. Sonic Chaos (Game Gear) Japanese instruction manual, pg. 4-5.
  4. Sonic Blast (Game Gear) Japanese instruction manual, pg. 4-7.
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