From Halopedia, the Halo wiki
Album:
Halo: Combat Evolved Anniversary: Original Soundtrack
Composer(s):
Martin O'Donnell and Michael Salvatori
Length:
1:41
Previous:
Arborea Above
Next:
Cloaked in Blackness
Bad Dream is a track included in the Halo: Combat Evolved Anniversary: Original Soundtrack.
It is heard during The Library and at the beginning of the secret Terminal. It runs for 1:41.