Remember how Arkham Asylum came out and everyone loved it because it was really good? This is like that except pretty much the same thing. The gameplay is similar to Asylum's on a fundamental level, but it adds some things that really help to open it up a bit and addresses some of the first game's minor issues.

My only real complaint is that while there's some really cool stuff with the Riddler, the actual riddles themselves don't seem to be as good as the ones in Asylum.

Why haven't you played this yet? Seriously. Go play it.

It's kind of like DotA, but with shooting instead of the top-down Diablo thing that I can't stand.