The Witcher 2-90%
I read reviews about this game and I couldn't wait for the xbox port. In order to ready myself, I read info on the witcher 1, the books, some of the major characters and even the geography of the fictional world. All worth it.
The game can be hard at times and expect some frustration, even when you're facing two enemies. The combat is almost like Assassin's creed on steroids. The story is amazing and thrilling with a possible 16 endings! Some of the things mentioned can be confusing (like the places), but you'll probably understand later in the game.
The visuals received a downgrade for the xbox version. Texture pop in is undeniably high and the framerate isn't the best (luckily my tv has motion flow) , but the game still looks pretty good.
What I didn't like about the game: The inventory system is pretty bad, some things are left unexplained, minor glitches (enemies vanishing, enemies not moving/responding making them easy to kill) and the difficulty can be harsh.
I recommend this game to all the gamers who like mature RPGs, get this game please! Help boost the sales, so I can play The Witcher 3