The truest definition of a perfect game.
Gliding around Gotham feels fluid and the haunting scenery of a fallen empire instills Arkham's dark theme. Batman's combat feels just as satisfying as ever, but with added obstacles. In Arkham Asylum, the only argument might be that it was too easy; Rocksteady increases the difficulty and creates more of an incentive to be stealthy, which is more fulfilling and innovative anyway.
The story leads you on quite a peculiar road, and you end up working alongside some of Gotham's most notorious villains. Though you will come into contact with many villains in Gotham, some are not given the attention they are due. Two Face has but a small part in the game, and I would have liked to see more. Aside from that, everything has lived up to the hype and surpassed my expectations.
Anyone that has not played this game has unintentionally committed gamer sin. So please buy or rent now if you haven't. It's a masterpiece, truly.