A few years back I actually took a bunch of different music from some Playstation games and made my own little tape of game music
I loved the original Ridge Racer music, so quirky and fun. Also Loaded had a good soundtrack with music by Pop Will Eat Itself. I later got their album and quite enjoyed it. Medal of Honor also had some great music, and there was another game, but I can't remember which
Anyhoo, there is some excellent music coming from games lately, and with video games becoming such a hot comodity its only going to get better.