Halo Reach PC Gameplay Part 3- "Nightfall"

In this level the mission involves Noble Six cooperating with Jun-A266 (Noble Three), in a series of stealth-based encounters at night, the purpose of which is to recon Covenant Forces in the colloquially named 'Dark Zone'.After proceeding further into the dark zone and eliminating the Covenant troops in the area, the two Spartans discovered a Covenant landing zone. Kat receives the visual and tells them to retreat so they can prepare for the next day.