I'm loving the dark vibes, and the sounds you've used! Some powerful percussion in the second track to add on some tension after the first one (that set the tone for this soundtrack very well). The initial vibe is never lost, even when writing pieces that aren't inherently dark or anything, which is great, and ties it all together, you get a great sense of the general atmosphere of the game.
I like the mix, it's nice and powerful, and the right elements shine, if there's one nitpick perhaps, I feel like some higher notes cause a bit of a unpleasant resonance, an example would be on the beats at the end of "The Ancient Melody", so some EQing could perhaps help there. But I think you did a fantastic job, and I especially love Interception! :)