To all those people who complain that the game is "To easy, where's the challenge", how about just enjoy the game. Enjoy what the designers have put into the game, the environment (sound/surrounding), the storylines, the side quests, Easter egg's and in general the gameplay itself. Why buy a game if your not going to immerse yourself in the world that has been created for you, by some hard working Man/Women.
If you want a challenge buy Dark souls and play that on the highest settings and everytime you die, you have to fight your way back through the enemy's you've already killed that have responded, without the weapons your were using, to collect them and your xp off your body.
If that's not a challenge enough for you people. Then I'm guessing your obviously such a amazing person that the only challenge left for you is ( Life) so put your controllers/mice and keyboards down and experience the biggest challenge of all.