Well, are we talking, "soundtrack that most compliments the game it's paired with," or, "soundtrack that I'd listen to independent of the game it was originally in"?
Either way, Akira Yamaoka's work in the Silent Hill games would be near the top, as would Mark Morgan's Fallout and Planescape: Torment soundtracks.
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom















