Floodgate (Level)

Floodgate is the title of the sixth campaign mission of Halo 3.

Upon disabling the AA Gun in The Storm, a Flood-controlled Covenant cruiser crashes in Voi. In order to eliminate the infestation, Master Chief and the Arbiter must overload the crashed cruiser's engines, wiping out the entire city and the Flood with it.

Upon completing it on the Normal, Heroic, or Legendary difficulties, the player will earn the "Cleansing" achievement and 30 Gamerpoints.