Blue Team arrives at the Forerunner world Genesis, where they discover the true reason for the Guardian's activation.
- Lasky: There have been five more events following Meridian. That's eleven colonies. I need a means to stop this. Now.
- Locke: The Warden confirmed Dr. Halsey's theory: Cortana is activating the Guardians.
- Dr. Halsey: But not this one. Not yet. Sunaion. A pre-Covenant religious site on Sanghelios.
- Lasky: There's a Guardian on the Elite homeworld?
- Palmer: If we get a team on the ground, we can access that Guardian.
- Lasky: Sanghelios is off limits. The brass want nothing to do with the Arbiter's war.
|N/A||Together Again||Complete mission 7||10G|
|Take a Hike||Traverse the canyon in Reunion without a Phaeton on Heroic difficulty.||10G|
|N/A||No Witnesses||Destroy the Phantom at the Covenant camp in Reunion on Heroic difficulty.||10|