Hey there Ross! I have some great soundtracks for you. You can even keep these!
DEFCON: This is a pretty good game with an eerie soundtrack. War Games the game I guess.
https://drive.google.com/folderview?id=0BwG3pExJHIbuUW1Lc284R05qVU0&usp=sharing
Darwinia: A pretty unique RTS game. Trippy as all get out though.
https://drive.google.com/folderview?id=0BwG3pExJHIbuaUtKUE51TDZ3U28&usp=sharing
Brainpipe: I can't even explain this one. It uses loops in the game files to randomly generate the music for the game while you are playing it. Here are the loop files, but look up some gameplay to get a picture of what the game sounds like all together.
https://drive.google.com/folderview?id=0BwG3pExJHIbuVlFzdG9VNWlFT3M&usp=sharing
Even though you probably know of this one, It's still absolutely radical.
Titan's Quest is in my opinion, a VERY good "Diablo Clone". It is very well rounded, and has a kick ass OST!
Space Engine Isn't really a game. It is the ENTIRE UNIVERSE inside of a program. It uses NASA star charts to create a universe to explore with randomly generated planets. And It's OST is sooooooooooooo zen.
Thanks for the videos Ross, glad to repay you in some way!