Sorry, Halo fans: Looks like the fate of co-op over Xbox Live is in doubt.
In the latest issues of EGM, Bungie's Frank O'Conner says: "We know that people want it and we're trying to make it happen. I think the biggest problem for us for online co-op is that we have a situation where you can be in a Warthog with five troops, almost a mile away from the other player. That's a significant challenge. And there's lots of design things you could do to prevent that from happening, but they would make it not feel like Halo anymore. If we can make it happen in a way that works well, we will - and if it works badly, we won't."
There you go. Maybe bad news, but you gotta respect Bungie's dedication to the gamer's experience.
Computersandvideogames: Halo 3 co-op heads offline