Ok so I remember a while ago there was a thread similar to this, but I can't seem to find it.

Whats some of your favorite video game scores?

http://www.youtube.com/watch?v=GW8x8I8kA2U&feature=related

http://www.youtube.com/watch?v=aXCM0lZxh4U&p=8B5F82FBE2F7FF9B&playnext=1&index=1

http://www.youtube.com/watch?v=Y6ljFaKRTrI

/thread

http://www.youtube.com/watch?v=7fXC2S-1tGU

http://www.youtube.com/watch?v=fZU9vFsrToQ

The latter has one sick guitar solo.

http://www.gamesas.com/index.php?/topic/1109817-best-game-music/page__p__16265385&#entry16265385

http://www.gamesas.com/index.php?/topic/1108574-videogame-musak/page__hl__videogame%20music

Anyway, Fable, Deus Ex main theme, Mark Morgan (PST, Fallout).

Edit: ninja'd

Metal Gear series (especially the first).

WIN!

http://www.youtube.com/watch?v=vg0Tmydj29M. Probably one of the best, and most epic, themes of any game. I get a little nostalgic every time I hear it.

Yep.