For the week starting April 28, the title beat out Infinity Ward's Call of Duty 4: Modern Warfare and Bungie's Halo 3, which clocked in at second and third, respectively. Rankings are based on the number of unique users playing online while connected to Xbox Live.

GTA 4's top ranking knocks Call of Duty 4 off of a solid three-month streak at number one in online activity. The last game to supplant Call of Duty 4 was Halo 3 back in early January, shortly after the holiday blitz of new users hit Microsoft's online gaming service.