This thread is full of jrpg:s.  Oh well, here is my contribution to this thread:

I gotta admit that people posting music from the likes of Final Fantasy and Halo kinda takes me aback, here.

One of the most underrated games EVERRRR

A very emotional song, just fantastic!

Now it may look not as such, but back in the day, this game was as fresh as little and it was real fun. I think the Guitar Hero and music titles alikes are in debt to this a Parappa in the original PlayStation.

Skies of Arcadia. Another great RPG.

One of the greatest Boss Battle themes.

Awesome game. Awesome boss. Awesome soundtrack.

Hong King theme from Deus Ex. One of the few games that I played without turning the music off or very low.

And not enough people played it, otherwise dumb games (not simple ones, simple games can be brilliant) wouldn't have a place in our world.

I love this one!!!