Exodus

Exodus is an island that floats high in the sky using the eternal energy of the Master Emerald. The island is inhabited by various Animal Friends and is also the home of the long lost civilization called the Ancients, Hyo and Kyosuke. Exodus has a highly variable environment, such as forests, ancient ruins, deserts and high icy mountains. There might however be a last survivor in the form of a immortal citizen called, Minamoto no Raimei.

Atlantis
Atlantis is the Capital city of Exodus. In this appearance, Atlantis is mostly modelled after San Francisco, as some areas below have similarities with San Francisco's places. It may also be based on multiple cities, because area backgrounds appear to feature both San Francisco and New York City skylines combined.

Areas

 * City Escape: a stage based on the long slopes of San Francisco. Paul Gekko runs through the stage while Exploring Exodus.
 * Radical Highway: a highway bridge under construction; based on the Golden Gate Bridge. Utakata runs through it.
 * Mission Street: a street stage that is also set on the bridge at times, based on the real-life street, Mission Street, in San Francisco.
 * Route 101: a long bridge over the sky.
 * Route 280: an equally long bridge, where Paul Gekko walks through. However, like Route 101 this route is more lethal as there are tunnels.
 * Aquatic Mine: an abandoned coal mine that has been flooded, accessible through the sewer system of Central City.

Acropolis
Acropolis is a heavily populated city famous for its many attractions including an amusement park (Twinkle Park), a hotel/restaurant, and a casino.

Areas

 * Coastal area, a large outside area with the entrances to the train station, hotel, the office building, the City Hall area and Twinkle Park.
 * Train station (SS Ultra Central Station), the building where the train to Atlantis is stationed. It also has a path to the casino area.
 * Hotel, a large hotel that contains a pool, a Chao Garden, and a penthouse restaurant. The entrance to Emerald Coast and Sonic's Crystal Ring can be found there.
 * Office building (Cyber-Net Inc.), a skyscraper with an extremely proud owner. It is the entrance to Speed Highway
 * Twinkle Park area, a small room with doors that lead to Twinkle Park and Twinkle Circuit . In Twinkle Circuit E-102, Tails and Knuckles are able to play after finding their Twinkle Circuit pass (Found in the same place as where Sonic finds his security card). On top the building is what appears to be a Dragon Ball from the Dragon Ball franchise.
 * Casino area, an area that only contains the entrance to Casinopolis and a small alley.
 * City Hall area, a downtown area with a small park, a burger shop, a variety shop and City Hall itself. There is also a manhole that leads tothe sewer.
 * City Hall, a large government building which is the entrance to Speed Highway, and the area where Paul Gekko meets Batsu and Hinata.
 * Sewer, a dirty underground tunnel that leads to Twinkle Park and the variety shop.