Gore. Though it's entirely subjective, I think it's a pro rather than a con.
Ragdoll physics such as when you kill an enemy, they get sliced in two and fly different directions.
Finally, a game that isn't cutesy! But full of blood and mindless gore.
I had problems running this game though, it crashed every 20 or so minutes. But that's just me. If you enjoy the horror-ish feel, this game's good. I can't tell you much about gameplay because so far it feels similar to other games.
One of the better graphical games around definitely.