Is grand theft auto iv based on real locations?

Grand Theft Auto IV's open world is set in the fictional Liberty City, which is explicitly modeled after New York City. The game's design mirrors New York's geography with four boroughs across three islands, reflecting the city's boroughs like Manhattan, Brooklyn, Queens, and The Bronx. Adjacent to Liberty City is Alderney State, a fictional representation of New Jersey, complete with highways and urban layouts reminiscent of the Garden State. Rockstar Games uses these real-world inspirations to create a recognizable yet stylized environment that captures the essence of the Northeastern United States while maintaining creative freedom through fictional names and exaggerated landmarks. No other real-world locations are mentioned as direct inspirations in the provided evidence.