The Pillar of Autumn
Escape intact as Covenant forces board your ship.
Seek out surviving Marines and help them fight the Covenant.
Truth and Reconciliation
Board a Covenant ship in an attempt to rescue Captain Keyes.
Search for the map room that will lead you to the secrets of Halo.
Assault on the Control Room
Defend the Control Room against wave after wave of Covenant troops.
343 Guilty Spark
Creep through a swamp to meet the only enemy the Covenant fear.
Fight your way through an ancient security facility in search of the Index.
Re-activate the weapon at the heart of Halo... and learn the truth.
Stage a one-cyborg assault on a Covenant ship and bring back the Captain.
Destroy Halo before Halo destroys all life in the galaxy.