From Halopedia, the Halo wiki
This article is about the soundtrack. For the level of the same name, see Nightfall.
Nightfall is the fourth track (Disc 1 Track 4) included in Halo: Reach Original Soundtrack, and plays mainly in the Halo: Reach campaign level Nightfall. It is composed of Recon (0:00-1:05), Searchlights (1:05-2:02), Personnel Issues (2:02-2:56), Keeping What I Steal (2:56-3:56), Howling Dark (3:56-4:41) and At Dawn (4:41-5:40).
Recon (1:05) is eerie ambiance, featuring digital effects with a faint vocal singing the melody of the later track Ashes. The piece plays in the opening cinematic of the level, then continues into the gameplay sequence afterwards.
Searchlights (0:57) uses vocals, harp, and synth effects for eerie ambiance. The piece first plays in the level Long Night of Solace, when the Pelican arrives onboard Ardent Prayer. It plays again in the later level The Package, in the cinematic in which NOBLE Team enters the hidden entrance within SWORD Base.
Personnel Issues (0:54) opens with high tempo muted percussion with additional synth effects. The piece plays when Jun-A266 and Noble Six encounter a pair of Gúta.
Keeping What I Steal
Keeping What I Steal (1:01) opens with soft bass and strings playing a soft melody with piano accompaniments. The piece plays when Jun and Six first encounters members of Reach militia.
Howling Dark (0:45) is a reprise of Free Fire Zone (from the earlier track Winter Contingency), albeit with louder percussion. The piece plays when the second wave of Covenant attack after Jun and Six link up with the militiamen.
At Dawn (0:59) opens with brass and strings playing a single note in ambiance, it transitions into strings playing rising cues. The piece plays at the end of the level, after clearing the Covenant from the canyon, and continues into the ending cinematic.