Devils... Monsters...

Devils... Monsters... is the thirteenth piece included in the Halo: Original Soundtrack.

Overview
The name of the piece is a strong reference to the Flood, as it plays in the Library and for many of their other appearances. It repeats several notes many times, with carefully placed variations designed to surprise the listener. Much of the sounds are electronically-generated, and violins are incorporated at 0:12. An odd drum beat remains throughout the piece, reinforcing the eerie feeling of the music played. The piece is reorchestrated into Demons and Heretics in the Halo: Combat Evolved Anniversary Original Soundtrack.

Appearances
It can be heard:
 * In the level 343 Guilty Spark, when John-117 activates an elevator and it takes him deeper into the Flood containment facility through a blood-stained elevator shaft.
 * In the level The Library, at the first encounter with Flood carrier forms, when 343 Guilty Spark leaves John-117 at a locked door on the third floor after passing the index chamber, and at the end of the level when John-117 faced the final wave of the Flood before reaching the activation index.
 * In the level Two Betrayals, when John-117 approaches the final canyon to acquire a Type-26 Banshee to reach the final Phase pulse generator.
 * In the level The Maw, when John-117 enters the cryo area, and again in the armory if the player lingers there.