Gerard K. Marino & co.
You can now download the collection here:
[Hidden link. Register to see links.]
A little background:
I already had some of the GoW Soundtracks but at a lower quality and incomplete. Thanks to the following for providing the complete, high quality versions:
Abaddon - [Hidden link. Register to see links.]
!!!!! - [Hidden link. Register to see links.]
Ghost of Sparta and Blood & Metal official soundtracks were only available as digital downloads, thus the 256 kbps.
As for Chains of Olympus, I had attempted to find a complete rip, but some of the links were broken / dead. So I started doing some research and found a way to rip and convert the soundtrack myself. It includes all sounds and music, so you can pick and choose what to keep/delete.
UPDATE: Extra tracks downloaded from various sources. Most of these extra tracks are 128 kbps. Unfortunately I could not find better quality for the extra tracks. The folders included are titled Unreleased Tracks, a sorted COO tracklist, Ambience, and the new Ascension soundtrack (256 kbps).