Just wanted to tune in here to say how awesome this game is. I love how this game basically came out of nowhere and is as good as it is. The overall presentation is absolutely top notch, with wonderful voice work, a great musical score, very cool looking scenes, and environmental design that mostly reminds me of Bioshock, surprisingly enough.
The developer did a great job in terms of pacing. You never get bored and there's always something new and interesting around the corner. Nothing drags on for too long, it's all juuust right. Combat feels great and gets better as you go along, the sneaking portions get more interesting the further you get into the game, boss fights are really diverse, and all the riddler collectibles and challenges are surprisingly engaging.
There's still lots of promising games on the horizon for this year, but this game is already a GOTY contender for me. I can't think of a better way to start the fall season, honestly.