Epilogue (Halo: Reach)
From Halopedia, the Halo wiki
Epilogue is the eleventh track heard on the Halo: Reach Original Soundtrack.
The song is heard in the eleventh and final playable campaign level of Halo: Reach, Lone Wolf; in both the opening and ending cutscenes. The vocals from the in-game section of Omega are heard during ONI: Sword Base, when the player returns to the front gate after completing the previous objectives.