6. Improve team-mate AI

The enemy AI in the Halo series has always been on the cutting edge. Enemies react realistically and work as a team to try and take you out. We're confident that Halo 4 will feature brilliant enemy AI, so it's the team-mate AI that we want sorting out. Halo 3's human squads were excellent in almost every way, apart from being incredibly dumb. We don't want the AI to take over and play the game for us, but we want to see them actually helping us out. We want to be able to hop into the driver's seat of a warthog and have one of the AI controlled team actually take out some of the Covenant.

5. Release it on Xbox 360 and not Microsoft's next console

Right. We were torn about this a little, but in the end we felt it would be best for everyone if the next Halo was released on the Xbox 360, and not Microsoft's next console. One Halo game on the Xbox 360 just isn't enough (the non-Bungie games don't count) and we think waiting another three to four years for a true follow-up to Halo 3 is too long. It makes financial sense too. Halo 3 has sold in excess of 8 million units worldwide, so imagine how many copies Halo 4 could sell when the Xbox 360 user base has had another few years to increase. Halo 4 would make an incredible launch title for the next Xbox, but it wouldn't sell nearly as many copies as it would on the Xbox 360.