The Covenant (level)

The Covenant is the tentative title of the 8th campaign mission of Halo 3. It takes place in a "citadel", as discovered in the beta. This citadel is possibly and probably forerunner, considering the emphasis on Forerunner buildings present in non-Halo environments. If this is true, this the citadel is most likely The Ark. As the purpose of the level is to "stop Truth", it is possible that the ultimate objective of the level is to kill the Prophet of Truth in a boss-battle of sorts.

It seems likely that the battle depicted in the Diorama ad takes place in this level. If so, the level's plot may follow the Chief's apparent capture by Brutes.

Upon completing it on the Normal, Heroic, or Legendary difficulties, the player will earn the "Last Stand" achievement and 40 Gamerpoints.

Trivia

 * "Last Stand" can also be compared with the "Last Stand of the 300 (Spartans)."