Halo (Halo 3 level)

Return is believed to be the ninth and final campaign mission of Halo 3.

It takes place in an unidentified Halo ring.

Upon completing it on the Normal, Heroic, or Legendary difficulties, the player will earn the "Return" achievement and 50 Gamerpoints.

Trivia

 * It could be the return of the Master Chief to a Halo ring.