Video game music.

[Placid]

most of the stuff from Legend of Zelda: Windwaker is an awesome soundtrack.

[Ad Bot]

[Dippindots]

Anno 2070 main theme

http://www.youtube.com/watch?v=4Q8bF5XP9pY

[Pliny]

Some stuff from the Neverhood, although I've never played it.
Cave Story's soundtrack.
Everything in The Binding of Isaac
TF2's soundtrack.
Dungeons of Dredmor's soundtrack.
Half-life 2's soundtrack.
That's to name a few.