Halo is a game currently under development.
It features a blend of 3rd person and 1st person shooter action including vehciles, indoor and outdoor environments and stunning graphics. Halo is being developed by Bungie Studios and will be published through Microsoft Games. Bungie is infamous for withholding release dates until they are certainthey can be met. Best estimates say that it should be ready within a year. It is quite likely that we won't be seeing it until after Microsoft releases its X-box gaming console.