Somewhere, someone has got to make a lot of money on this game, and are now probably laughing all the way to the bank.
The previously best selling Halo game, Halo 2, has now been overtaken by Halo 3.
Halo 2 has to date sold 8.46 million copies (for the Xbox anyway, not counting PC), and Halo 3 has now passed that, currently selling 9.40 million copies worldwide on the Xbox 360. Now that's something!
If you scroll a bit down
this chart, you will see that Halo 3 is the all time best selling Xbox 360 exclusive title, and Halo 2 is the all time best selling XBOX title.
These are pretty impressive figures.
Sidenote: Although I play and love Killzone 2 - a "Halo killer" it is not. At least not so far. The sweet looking shooter has so far sold 1.32 million copies.
[source: QuadGamer.com]