Major Nelson has recently posted the top 20 Games For Windows Live games of 2009. GTAIV took the top slot beating out some of the best sellers of late 2008-2009 such as Fallout 3 and Batman: Arkham Asylum. The 360 version of GTAIV didn't fare too bad either taking a respectable 6th place and getting beat only by the usual multiplayer suspects such as Call of Duty and Halo. Congratulations to Rockstar North and Rockstar Toronto!

Source: Major Nelson