This game has one of the best openings ever with the first two hours. The atmosphere is dark and moody with a good bit of humor. The exploring is fun because you never really know what kind of game its gonna be.
As soon as you get guns and stuff like AI, hit detection and movement become more important, it starts to fall apart. This is a buggy mess for sure. Much love went into the leveldesign and there are so many nice little ideas but often times they just don't work because of the execution.
This remains an interesting game to play until the end but my god, are there painful sections. Some aren't even fun to look at with the factory probably being the blandest part. And to hell with those headache-inducing visual filters.