Halo 2 has overtaken sales of Halo 1, with 6.4 million sales worldwide. Those were the delighted fresh sales figures for the Xbox exclusive first person shooter, which was the second biggest selling game of the year in the USA in 2004, just behind Grand Theft Auto: San Andreas. Halo 2 is also helping to push Xbox users online in addition, with 1.4 million users signing up for Xbox Live thanks to the game.

The enormous success of the game, developed by Microsoft-owned studio Bungie, comes mostly from North America, where 4.4 million units have been sold in the USA alone, and pushes the franchise past the 10 million mark.