Best Soundtrack of any game you have ever played

What would be your favourite gaming soundtrack?

Mine would be Final Fantasy IX hands down! The music in the game fit the tone and the themes to near perfection. When you enter the mysterious world of Terra, you are greeted with a melody that sounds just as mysterious. The World Map theme on the 4th disk is ominous and creepy, which fits with the mist laden world.

Mass Effect 2 HANDS DOWN!!!!

If we are including licensed, the only correct answer is Brutal Legend.

Original...Marty O'Donnel of Bungie has put out some great stuff for Halo.

Streets of Rage 2. BEATS.

Ohh man, that's a tough one. There are sooo many games with great soundtracks. World of Warcraft, the Sonic Adventure games, Halo games, and even Majora's Mask, if all the songs were reorchestrated, that is. (there also other games with awesome soundtracks, but that's all I can think of right now.)