Major Nelson has confirmed that Halo 3 was the most-played game on Xbox Live last year.
Call of Duty 4 came in second, followed by GTA IV.
Castle Crashers topped the XBLA charts, with Geometry Wars Retro Evolved 2 and Braid coming in second and third respectively.
Halo 2 topped the list for the original Xbox, with Fable and Star Wars: Battlefront 2 making up the rest of the top three.
By Mike Bowden