Listen to Samples & Purchase
Artist: Nine Inch Nails

DarkMagus says:

This 36 track double album is nothing but cinema quality instrumentals that are perfect for gaming. There are amazing sound textures and a variety of instruments and moods. While most of the songs have a more modern feel to them I still highly recommend it for any game! I’d say the only down side to this album is that since the tracks are named with numbers it gets hard to remember which is which without listening to it or writing down some quick notes (which I did for my game).

If I get some extra time I might even copy down my notes of some of these songs.