Epic game.
The gameplay is really well done. It has so much content. First, you have a lot of weapons. You can find them and also buy it from a guy named Drebin.
You know that this is a tactical game so for that is great. You can hide in the bushes, grass, rocks and other things. And the most greatest thing about this is the OctoGamo, a special suit to camuflate yourself. That is one of the most cool things that I've seen in a game.
About the difficult, this game is not hard, but not easy either if you play in normal mode. As I said, this is a tactical game so you can't just go and kill your enemies, you have to be patience and think about the right time to act. Otherwise you'll be killed in a matter of time.
The bosses fights are fun, but some of them are long and hard. You have to think how you have to kill them and use the right weapons. Once you kill them you'll gain special tools or weapons.
The story is great and when you finish the game you will have a great ending. I must say that is one of the most satysfing endings that I have seen in my life.
The only complain that I have is that the game is not very long. I finished in 20 hours in normal. But that's all. The game is fantastic and a sure buy for PS3 owners.