Imagine if in Tony Hawk, instead of finding the perfect line for your huge combo, you described that combo with creative use of enemy flesh. I don't really care about the over the top attitude of the characters, though it is theme appropriate for the over the top shit you do to people, I just fucking love the idea of a combo based FPS that directly rewards you for how creatively you murder everything in sight. I say directly reward because the currency to upgrade your weapons and abilities is the points you earn from the skill shot kills. So the more creative you are, the more options become available, allowing you to be more creative, and so on.
I'm not calling this thing a work of art or anything, it's just exactly the kind of ultra-violent, tongue-in-cheek fun that FPS games have been missing since the rise of serious business military shooters.