External tools such as the Building Architect Tool (BAT) allow custom third-party buildings and content to be added to the gameplay. SimCity 4 introduces night and day cycles and other special effects for the first time in the SimCity series. For the success of a city, players must manage its finances, environment, and quality of life for its residents. Players can zone different areas of land as commercial, industrial, or residential development, as well as build and maintain public services, transport and utilities. The game allows players to create a region of land by terraforming, and then to design and build a settlement which can grow into a city.

SimCity 4: Deluxe Edition contained the original game and Rush Hour combined as a single product. SimCity 4 has a single expansion pack called Rush Hour which adds features to the game. It is the fourth major installment in the SimCity series. SimCity 4 is a city-building simulation computer game developed by Maxis, a subsidiary of Electronic Arts.

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