Osiris Suite, Act 4
From Halopedia, the Halo wiki
Osiris Suite, Act 4 is the thirty-ninth and final track of the Halo 5: Guardians Original Soundtrack, composed of many tracks of several different levels. The first portion is an original track, while the second plays during the level Reunion, as Blue Team begins to explore the planet Genesis. The third portion is original, followed by music from the first gameplay section of The Breaking. The fifth track also plays in The Breaking, when Blue Team is cornered by multiple Soldier Captains with splinter turrets. The last track includes original electronic music.