What's your favourite game soundtrack?

[BumblebeeCody*]

Bastion is well worthy of mentioning. Lately the Metal Gear Rising Soundtrack is frikkin' awesome. Fits so well with the game and I could easily see it on Kerrang or ...something. I'd also add The Legend of Zelda series, Deadly Premonition, Mirrors Edge(very relaxing), Devil May/may Cry, Final Fantasy(some of the best) there's a lot of great soundtracks from games, it's hard to list 'em all; even from games I haven't played like Halo or Motorstorm.
There's also the obvious entries like Tony Hawks Pro Skater/Guitar Hero/Grid etc which use licensed music.