Halo 3: ODST

Halo 3: ODST (Orbital Drop Shock Troopers) is a new chapter in the Halo saga that lets gamers experience events leading up to the epic story told in Halo 3 through the eyes of a new hero in the Halo universe. The stand-alone expansion extends the Halo 3 experience with hours of new campaign excursions and multiplayer gameplay.