Liberty City in the GTA IV Era is the third appearance of Liberty City, much different from its appearance in the GTA III Era and much more closely based on New York City. The city has more detail and personality, with many more places which are based on landmarks such as the Statue of Happiness, Star Junction and the Rotterdam Tower.
This rendition of Liberty City has versions of four of the five boroughs of New York City, plus New Jersey. Brooklyn is Broker, Queens is Dukes, Manhattan is Algonquin and Bronx is Bohan. The state and city of New Jersey is Alderney, which technically is separate from Liberty City. The only borough not to be recreated in the game is Staten Island.
Grand Theft Auto IV and its two episodes (The Lost and Damned and The Ballad of Gay Tony) use the same full rendition of the city. However, a small number of different locations are accessible in the different episodes. Grand Theft Auto: Chinatown Wars uses all of the city apart from Alderney and is altered for the top-down perspective of the game.
"With more sights, shows, restaurants, bars, museums, shopping and borderline psychopaths than you can shake a shotgun at, there is no place quite like Liberty City. Where else can you get sworn at by a senior citizen, accosted by a crackhead, propositioned by a prostitute, and strip-searched by a police officer, all before breakfast? Discover the history, culture and diversity that make a booming metropolis the capital of the world, at least according to the over-caffeinated locals. We encourage you to explore Liberty City's four boroughs and it's islands, each with it's own distinct atmosphere and personality. There is always something for everyone. There is also Liberty City's sister, Alderney State..."