So much better on a second play-through (at least for me). Wonderfully immersive when you know what you're doing and you're not stopping and starting every 20 seconds for a puzzle. Such a beautifully constructed world, with so many tiny little details that really sell the realism of the place you're walking through. The sound design is gorgeous, especially for the underwater stuff (some of the best water levels in any game right here) and the animation work for... that thing is exceptionally good, I have no clue how they even pulled it off.