Development was shared between DMA Design, based in Edinburgh, and Rockstar, based in New York City. Much of the development involved transforming popular elements from the "Grand Theft Auto" series into a fully 3D world for the first time. The game was delayed following the September 11 attacks to allow the team to change references and gameplay deemed inappropriate. It was released in October 2001 for the PlayStation 2, in May 2002 for Microsoft Windows, and in October 2003 for the Xbox.