'Central City is the capital city of the United Federation in the Sonic the Hedgehog series of video games.
The city in Sonic Adventure 2 is unnamed, but said by many to be San Francisco or Station Square. It has also been theorized that the city goes back to Sonic Adventure, and that Station Square is a district of the city. The first Hero cutscene states that it takes place "above the capital city," and in Shadow the Hedgehog, G.U.N. soldiers and Doom's Eye refer to Central City as the capital. This concludes that the city in Sonic Adventure 2 is most likely Central City. It is probably based on San Francisco, as some areas, below, have similarities with San Francisco's places. Central City may also be based on multiple cities, because area backgrounds appear to feature both San Francisco and New York City skylines combined.
- City Escape: a stage based on the long slopes of San Francisco. Sonic runs through the stage while escaping from G.U.N..
- Radical Highway: a highway bridge under construction based on the Golden Gate Bridge. Shadow 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 an ocean. Miles "Tails" Prower drives on it while chasing the President.
- Route 280: an equally long bridge, where Rouge the Bat chases Tails. However unlike Route 101 this route is more lethal as there are large holes.
- Aquatic Mine: an abandoned coal mine that has been flooded, accessible through the sewer system of Central City.
Central City appears as an overworld in Sonic Battle. In it, there's an apartment where Amy Rose and Cream the Rabbit live, a skyscraper with a library and a famous database, and a highway called Battle Highway. Tails goes here to find out more about Emerl. Another part of Central City named Night Babylon also appears as a casino district where Rouge owns her own club and Dr. Eggman has one of his numerous bases.
- Main Article: Central City (Stage)
Central City also makes an appearance in Shadow the Hedgehog. The first city appearing in the game is named Westopolis, but if Shadow helps Eggman light five lanterns in his Cryptic Castle base, Shadow goes to the Central City stage. In it, GUN tries to fight off the invading Black Arms aliens that are trying to destroy the city. The Hero Mission is to help Knuckles the Echidna capture twenty bombs, and the Dark Mission is to help Black Doom detonate five giant bombs. Shadow the Hedgehog reveals that the President of the "United Federation" nation lives in Central City in a variant of the White House. It is destroyed by the Eclipse Cannon after clearing the Dark Mission of The ARK stage. Whether Central City is destroyed or not is up to the player. Central City also appears in Expert Mode, where Espio the Chameleon challenges Shadow.
Central City is one of the areas in Sonic Chronicles. Tails' Lab and G.U.N Headquarters can be found there, as well as numerous shops. Roads lead both to the Green Hill Zone and to Mystic Ruins, although the latter is blockaded by GUN troops during Chapters 1 and 2.
The enemies in Central City include Wasp Swarms and Eggman's robots (secretly under Nocturnus Clan control).
It is in Central City that both Tails and Rouge are recruited into Sonic's party.
- Central City is likely based off of San Francisco.