New York (NY) - For the first week of its availability, Grand Theft Auto IV was the most played game on Microsoft's online gaming service.
The Xbox 360 version of GTA IV has been outselling the PS3 one, though not by an overwhelming margin. According to a post on his official blog, Xbox Live's Larry Hryb said that Call of Duty 4 was in second place on the list, followed by Halo 3, Guitar Hero III and Gears of War.
The stats are based on the number of unique users who took the game online during the week of April 28. The exact number of users was not revealed.