I know there are mixed feelings about Halo 2, but the sales figures are absolutely astonishing. In less than 1 month Microsoft has sold over 5 Million copies of Halo 2. It took almost 3 years to sell that many copies of Halo. It may not be the hands down best game of the year, but it may very well be the best selling or fastest selling.
Source: [url=http://xbox.ign.com/articles/570/570383p1.html]IGN[/url]
