Halo 3: ODST - Xbox 360Amazon. com Developed exclusively for Xbox 360 by acclaimed developer Bungie, Halo 3: ODST is a new, stand alone expansion to the Halo saga that lets players experience the events leading up to the epic story told in Halo 3 through the eyes of an entirely new character the ODST (Orbital Drop Shock Trooper), as they search for clues leading to the whereabouts of their scattered squad and the motivations behind the Covenant's invasion of New Mombasa.