Thanks for the replies.
Olliepm, I think your reply would make sense if people where equating "complex" with "good," which they aren't. This thread highlights games that have pushed technology forward, or been ambitiously clever in some way.
Kryzon, although i was looking for more recent examples, i have to say, your reply is stellar. I think whoever hid these musical gems in these classic games deserve some recognition. Really cool, and thanks.
nsmadsen, thanks. you sound smart. I hear you re: generative melodies. I've been trying to do that, and it's a bog. In M.E., you have layers of intercombinant beds of music, sticking to elements that loop and combine easily (in spite of the overall complexity of the branched/interactive game design/A.I.. Have you ever heard something where you were musically surprised at how well it all worked together? Something that made you think, wow, I didn't think that could be done. A simple version is the music in Monkey Island, where cartoon comedy stabs (trombone, etc.) play over a looping bed. Any other game do that?
oceannoiseworks - i will have to check that game out. amazing that i never played it.