This file is downloaded from https://downloads.khinsider.com/game-soundtracks/album/quake-unofficial-mission-pack-no.-3-abyss-of-pandemonium-original-soundtrack

Name: Quake Unofficial Mission Pack No. 3 - Abyss of Pandemonium Original Soundtrack

Year: 1998
Catalog Number: N/A
Platforms: IBM PC, Windows
Published on site: 8th of May, 2023

Change Log: 

2023-05-08: 
Here are the FLACs.  I didn't realize I needed a new link.

2023-05-01: 
Added song titles based on the levels/maps in which they play.