Dewy Decimate

Dewy Decimate is the twenty-seventh track (Disc 2 Track 10) in Halo: Combat Evolved Anniversary: Original Soundtrack.

Overview
Dewy Decimate is an arrangement of Library Suite from Halo: Original Soundtrack, and similarly consists of five ambient tracks.

The first section (0:00-1:02; duration of 1:02) is an arrangement of the first section of Library Suite, albeit being slightly longer. It plays in place of the original track in Halo: Combat Evolved Anniversary:
 * In the level The Truth and Reconciliation, when John-117 and Fire Team Charlie first boarded the eponymous ship.
 * In the level The Silent Cartographer, when John-117 approaches the passage to the security control.
 * In the level Keyes, at the beginning, when John-117 reaches the hole at the hangar bay.

The second section (1:02-2:17; duration of 1:15) is an arrangement of the second section of Library Suite, albeit being shorter in duration. It plays in place of the original track in Halo: Combat Evolved Anniversary: in the level The Library, after John-117 has passed through the third floor of the Library's index chamber, and entered another hallway with blue monitors, up until the point where he reaches the final door on the fourth floor, which leads to the index chamber. The track was briefly interjected by the earlier track Demons and Heretics, when John-117 is waiting for 343 Guilty Spark to unlock the door at one of the hallways on the third floor.

The third section (2:18-3:55; duration of 1:37) is an arrangement of the third section of Library Suite, albeit being slightly longer. It plays in place of the original track in Halo: Combat Evolved Anniversary: in the level The Library, when John-117 enters the first hallway with the blue monitors on the first floor of the Library, after passing through the first door from the index chamber, up until the point where 343 Guilty Spark leaves John-117 at a locked door on the second floor to reset the backup unit for a drone control subsystem.

The fourth section (3:56-5:00; duration of 1:04) is an arrangement of fourth section of Library Suite. It plays in place of the original track in Halo: Combat Evolved Anniversary:
 * When John-117 waits for 343 Guilty Spark at the first locked door on the first floor of the Library.
 * When John-117 is passing through the second floor of the Library's index chamber, up until the point where he exits a small tunnel in the second floor.
 * When John-117 passes the locked door leading into the third floor of the index chamber, up until the point where he enters another hallway with blue monitors after passing through the index chamber.

The fifth section (5:00-6:17; duration of 1:17) is an arrangement of the fifth section of Library Suite. An alternate version, featuring a prominent high string part, plays in the main menu of Halo: Combat Evolved Anniversary.

Production notes
The name Dewy Decimate is a reference to the Dewey Decimal System, which is used to catalog books in libraries.