Ghosts Of Reach is a song included in the Halo 2 Original Soundtrack, Volume 1.
It was composed by Martin O'Donnell and Michael Salvatori and is 2 minutes and 22.053 seconds long. The first part of the song is the same as The Maw and Remembrance, and when it passes the point at which Remembrance finishes a completely new tempo is added. It is mainly composed of a chorus, but has some less-noticeable background instruments.
It plays during the level Regret, when John-117 is going through the underwater-transportation. The second half of the song is heard in the "A Day At the Beach" chapter of the Halo 2 level Outskirts. Part of this song's melody was later known as the Arbiter theme. The "Day at the Beach" part is remade as "Black Tide" in the track Dread Intrusion on the Halo 3: Original Soundtrack.