Halo 3: ODST: returns players to familiar ground on a vital, top-secret mission. The gripping story, cooperative campaign and new multiplayer content will have Halo fans “Preparing to Drop” in Fall 2009. Originally titled Halo 3: Recon, the new game brings the perspective of new characters to the Human-Covenant struggle, as it explores the ODST, or Orbital Drop Shock Troopers. – Xbox
Halo 3 ODST is like a new game for Halo fans. While you are still fighting Brutes, Grunts, and Jackals. But your not playing as Master Chief. You play as a ODST named “Rookie”. While you dropping into New Mombasa, you and your squad gets of course. During the whole game the main mission is to find your squad.