It works like this:
Halo IS an online game (sort of). It\'s just that since Xbox Live is coming out a full year afterwards, Bungie decided that it isn\'t worth it to fully develope the online feature. What you can do is have a LAN party with Xbox and some gaming centers can simulate a LAN party to allow online gaming for Halo. Look closely at some of the maps as they support far more than 4 players (I\'ve some could go as high as 32. Any confirmation on this?)