I finished the game's story, December 31, and I've only 20 something riddles left to collect, which I hope will turn to zero when I get the time to play again, because school started early.

I don't even need to detail anything else... everything's in the review. Apologies for the lengthiness.

http://www.gamespot.com/pc/action/batmanarkhamasylum/player_review.html?id=701804