This game reminded me from the very beginning of Painkiller. A game that is unforgettable. And this one is too. The plot of this one is much better than the one of Painkiller and the firefights seem more intense.
You have lots of weapons and all upgradable. You have skills that can be upgraded too. You can buy ammunition and learn new Katana moves.
You have tons of enemies to bring down and you have so many edgy situations that you have to plan at times you next moves carefully.
Overall, it's a treat.