According to Yahoo:
The verdict is in: while Nintendo dominated the video game market in 2009, it missed out on the top spot.
Instead, it was the Xbox 360 version of Call of Duty 4: Modern Warfare 2 that sold the most, according to retail tracking firm NPD Group. Figures from the game's publisher indicate the blockbuster war shooter sold nearly 6 million copies in 2009, a feat that's all the more remarkable considering the game didn't release until well into November. Modern Warfare 2 was also the eighth best-selling game of the year, although on the PlayStation 3 rather than the Xbox.
Beyond that, the year belonged to Nintendo. Seven of the year's best sellers were Nintendo games -- six on the Wii, and one (Pokemon Platinum) on the DS. Aside from Modern Warfare 2, Halo 3: ODST was the only other non-Nintendo entry, charting at 9th place.
The list of the top ten can be found here:
http://videogames.yahoo.com/events/plug ... es/1385597