Cortana (level)
From Halopedia, the Halo wiki
![From the Halo 3 E3 2007 Trailer: The Arbiter, the Master Chief, 343 Guilty Spark, and Cortana, along with an unknown Elite in the background.](https://halo.wiki.gallery/images/thumb/0/02/E32007-1.jpg/200px-E32007-1.jpg)
Chief, Guilty Spark, the Arbiter, and another Elite aboard High Charity
Cortana is the 9th campaign mission of Halo 3.
It takes place in High Charity and is presumably involved with the artifact The Key of Osanalan.
Upon completing it on the Normal, Heroic, or Legendary difficulties, the player will earn the "The Key" achievement and 40 Gamerpoints.
References
Preceded by The Covenant |
Halo 3 Campaign Missions Cortana |
Succeeded by Halo |