Yeah, a game that recently achieved worldwide sales of $1 billion, is more than likely to be hailed as the best-selling title in 2009 (or indeed in any year). Today Activision confirms that last year Call of Duty: Modern Warfare 2 sold 11.86 million units across the US, UK and Japan - making it the biggest seller in those regions.

The sales of the popular shooter now surpass several successful Nintendo first party titles that were developed for the Wii platform.

To make things a bit more clear, here are the top 5 best-sellers in 2009 (compiled by NPD):

1. Call of Duty Modern Warfare 2 (Activision): 11.86 million
2. Wii Sports Resort (Nintendo): 7.57 million
3. New Super Mario Bros Wii (Nintendo): 7.41 million
4. Wii Fit Plus (Nintendo): 5.80 million
5. Wii Fit (Nintendo): 5.44 million

Source.