Microsoft explains why Bungie is brilliant

Microsoft invests in Bungie as developer of the Halo games because "they spend more time polishing gameplay" than any other studio.

That's according to Alex Cutting, producer on Halo 3: ODST from Microsoft Game Studios.

He said: "Bungie is an awesome partner. They say this a lot, and I believe it, they make the games they want to play.

"What's cool about Halo games is, you can be a year out from their actual street date, and the game's playable. People are actually playing the game at that point. We can watch people play, and we can get 60 people's feedback on just one experience in that game and polish that thing and hone it until it's triple A quality."