It improves and expands on everything Arkham Asylum did. The story is pretty good and the gameplay is much more refined than its predecessor. Arkham City is a good map, though it lacks the atmosphere that Arkham Asylum had, and despite being a prison, it's a beautiful city with distinct districts.

Now, was it really necessary for this game to have 440 Riddler trophies? I don't think so. It's a hassle.

Catwoman DLC is good and while she was fun to play, navigating through Arkham as her wasn't, I really really hate how her quick-time events just slows you down. I do wish we got more sections with Catwoman though.

Harley Quinn's Revenge is good, but nothing too noteworthy, it was cool playing as Robin tho, I do wish we could've seen more of him in the main game.