On the other side of the coin, Half-Life 2's music was rather disappointing given the long development time and other wise high-quality game. It boiled down to a few different synthesized sci-fi licks every few hours. I say this in spite of its being one of my favorite games of all time.
The whole point was that there wasn't supposed to be music.
[edit] Also, as far as Total Annihilation goes it's abandonware now, so it's not too find on the interwebs.