Really sounds like a great boss battle based theme to me which makes it all the better too. The song has a flow coming from it that makes you think of your character as some kind of bad ass hero. The tone of the song is not too awful bad anyways. The guitar sounds great.
The guitar has a good flow and great playing to it. The drums are great and love the beat they have there, sounds a bit like it was from an electronic drum kit. The bass is very light or lacking here though, just add a bass and it should be all good.
Overall ,great metal piece.