Liberty City from GTA 3 is actually Boston! It may sound weird, considering that many sources say that LC is based off New York City. But LC is an East Coast city, having no "Statue of Happiness" or "Firefly Island", like the GTA 4 Liberty City, which literally is New York City.
Boston has the Callahan Tunnel; LC has the Callahan Bridge.
Boston has its Boston Coomon park; LC has Benneville Park.
The runway design of LC's Francis International Airport reflects the runway design of Boston's Logan International Airport.
Boston has many of its landmarks rendered into LC (Park Street Church, Boston Public Library, John Hancock Tower, Copley Square, etc.)
Boston even has three main islands, just like Liberty City.
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