I don't think "addicted" quite describes just how much we all love Halo 2.
bungie is reporting today that there have been over 4 billion games of Halo 2 played since it was released two years ago. The chart above shows a breakdown of how the games are played, which modes are the most popular and so on.
I think this is absolutely incredible. I gotta tip my cap to Bungie and the Halo team.