Satiate by Kevin MacLeod
I piece unlike anything I've done, this is a very difficult piece to process emotionally. It just never lets the audience rest. There are a lot of uses for this sort of piece. It is also available with just the percussion, and just the strings... both of which are quite different from the combined.
This piece of music is available in an uncompressed format here.
very good piece of music, should have a heavy industry version of it just like crusade did