While COD 4 has set at the top of the pile for a long time now it looks like the new guy has rolled in and took over with an iron fist and its no real surprise.
IGN reports Aaron Greenberg, director of product management for Xbox 360 and Xbox Live, said : "We had roughly 1 million users in the first 24 hours of GTA IV's release went online with the game on Xbox Live," shocking for the games first try at online playability.
"It's been the number one game on Xbox Live since its launch, so it's knocked off Halo 3 and Call of Duty 4. At launch, our data shows that out of all of our members on Live, the majority of them were playing GTA IV.
With a community of over 10 million members, that's pretty rare."
Greenberg also said that 2 million GTA IV achievements were unlocked in the first 24 hours of the game's release. In addition, over 15 million Gamerscore points were added to users' accounts in the first day.
"Our teams have been doing a lot of work in advance of this game, in fact, months. The operations team has been working on scaling our infrastructure around building and increasing our server capacities," he added.
GTA IV is turning out to be a real power house and is letting it presence be known.