It's an FPS: http://www.joystiq.com/2009/06/03/halo-reach-is-an-fps/
It took a little doing on our part, but we've finally got a new detail for you about Halo: Reach. Are you ready for this? It's an FPS. Actually, Microsoft's John Schappert told us "Of course it's an FPS," which seemed a little cheeky from a company that recently released a Halo RTS. But who are we to judge?
So, there you go. FPS. And also ... no, that's it. But hey, it's something, right?