Microsoft deems that playing Halo is against their company rules. The release of Halo is actually all a set-up. You second you step in the door of Gamestop/ Best Buy/ Ebay/ whatever, they put a bag over your head and throw you in a van. They will then have a Clockwork Orange theatre, where they show you how bad video games are. After the video finishes, Jack Thompson, comes out with Bill Gates in one hand and a giant magnet (to erase all games) and starts giving a giant monologue about how bad video games are. Fortunately, Chuck Norris, Mario, Solid Snake, and (of course), Master Chief knock down the walls and lacerate Thompson.
This is actually the secret game/ movie project Peter Jackson is doing.