Okay, it's not actually a game per say- it's an App the lets you keep track of your Halo: Reach stats on the go. That's right... it's kinda useless, but it does have some redeeming features.
The Bungie.net Mobile App allows you to view your friends stats as well, plus the ability to pick up free account bonuses, gift things to your buddies, and watch the company's news feed.
So not too bad overall if you're a big fan of the developer. But it's the old foot in the door that's the bottom line isn't it? With one overarching App that establishes the company on the App Store- more will be on the way- Bungie is promising as much in a statement made this morning.
Keep watching the store-