Hey if you ever see the Mech Warrior 2 game, the CD itself has CD Audio of the game music. I think its pretty cool electronic music, although they are short at about 2:30 average, but there's like 20 songs on there.
I'll see if I can't rip some clips, so you can get an idea.
The "second" MechWarrior 2, "Mercenaries", also has CD Audio, but I didn't think it was very good music.
Also the original Quake CD had some interesting music. I believe it was composed by Trent Reznor, and it reeks of Pretty Hate Machine type atmosphere....which is good IMO
Also there was a game called Burn Cycle, I believe, that was an old PC game with <casandra from Waynes World>, it had some good music, but I got rid of the disc, and haven't had much luck finding it in second hand computer shops.