Gameplay is fast and furious. It is easy to find yourself surrounded by enemies and dying in seconds if you don't plan carefully. Strategy is half the battle in this game. You can't run into a room with your guns blasting and expect to walk out alive. Instead, sneaking into a room and snapping a back or two before you are noticed is often a good way to go.
Graphics are great.
The skins are amazing. The only complaint I could have about graphics is that the rooms are often a little bland. The textures are similar, and it gets a little tiresome, but the gameplay makes up for it, and you will find yourself too wrapped up cracking skulls to even care anymore. Sounds were amazing in Oni. The footsteps are fantastic, and I love the way they change when the floor switched from metal to pavement to gravel.