Microsoft says the latest installment of its "Halo" video game series is already setting sales records, despite not being released until next month. Microsoft reports over one-million preorders have been placed for its "Halo 3" Xbox game. The company calls it the fastest selling preordered videogame in history. Microsoft officials told the "Puget Sound Business Journal" they expect Halo 3 legendary edition will be sold out by the time the game debuts September 25th. Gamers: Click here to watch a preview of Halo 3.