I normally hate FPS, but I had a great time here. It starts out very easy and gradually becomes more difficult towards the end. I tried a bit of the NG+, but it was still the same environments with just harder waves, so I dipped out after a few arenas. Endless mode is also cool, though it doesn't seem to be for me. I would definitely play this up again, but I can't see myself going for the other modes without being on edge all day.