Grand Theft Auto IV was published by Rockstar Games.
 Grand Theft Auto IV broke industry sales records and became the fastest-selling entertainment product in history at the time, earning US$310 million in its first day and US$500 million in its first week
 Microsoft partnered with Rockstar in a US$50 million deal to bring two episodic downloadable content packs to the Xbox 360: Grand Theft Auto IV: The Lost and Damned on 17 February 2009, and Grand Theft Auto: The Ballad of Gay Tony on 29 October 2009

