SimCity 4 is a city-building simulation video game developed by Maxis, a subsidiary of Electronic Arts. The game was released in January 2003 for Microsoft Windows and in June 2003 for Mac OS X. It is the fourth major installment in the SimCity series. SimCity 4 has a single expansion pack called Rush Hour which adds features to the game. SimCity 4: Deluxe Edition contains the original game and Rush Hour combined as a single product.