I just finished it. What a wonderful game. I think the storytelling and writing are really outstanding, with characters I loved seeing together, but I was surprised to find how much I enjoyed the gameplay, too. This game has a pretty unique gameplay style, starting with clearly separated stealth and puzzle solving but eventually blending the two together seamlessly, and eventually evolving into full-on offensive combat, and I think it works really well. There are definitely a few points where the stealth becomes a little irritating, and I think they could have toned down enemy awareness levels for one thing (dudes can often spot you if you just poke your head around a corner, and their awareness meters fill up so fast you often don't have time to hide again), but checkpoints are generous and I never got stuck for more than a few minutes at a time.
I'd really recommend it to anyone on the fence. If you really just can't stand stealth or puzzle-solving then it probably won't be for you, but if a really great story mixed with some enjoyable puzzle-solving, stealth and light combat sounds good to you then this game should be right up your alley.
Are Achievements screwed up for anyone else, though? I don't know if they're just broken for me or if it's a widespread issue. Basically I didn't unlock any until mid-way through Chapter 5, where the game randomly popped the ones for finishing Chapters 1, 2 and 3 one after the other, and then I didn't unlock any more for the entire rest of the game. I've finished it now and I still only have those three Achievements on my profile.
