Amazing gameplay. With awesome main story plus interesting side missions. And various gadgets-combat technique.
The difficulty is not too hard, especially if you're a Batman-fans like me. Think like him, and we can do it easily. Hints are always useful, but after you mastered it, it will be much more challenging to turn off the hints.
I've waited so long for the prequel (but the next edition) of this Arkham Series. Batman: Arkham Origins. Hope it will be much better than the predecessor.