The first hour is an absolute exposition dump slog. I dropped it at least 3 times within the first hour after having owned it since day 1. Then I finally brute forced the boring opening and reached the diamond in the rough. The story, environment, atmosphere is absolutely awesome. Don't expect The Dark Descent, but do expect the setting to be expanded upon in a horrific reveal.
Unlike the later The Bunker, Rebirth is a *very* different game. It's more of a horror-y and mostly creepy visual novel, an interactive piece of fiction with little actual escape or hiding except in very predefined ways.
This all made me pretty disappointed at first.
But, sticking with it, the insanely twisted atmosphere and creepy visuals that far exceed what even the later The Bunker does (which I think is overall the better game and even outdoes TDD) really convey a dreadful feeling. It's as if HR Giger took a swing at creating an Amnesia-game-like feeling just via visuals and atmosphere. It's a shame there's virtually no gameplay to match it, but the overall game was still *very* good, at least IMO.
Just be aware, it's a visual novel more than a stealth exploration game. A very good one, IMO, but still odd to sell it under this label, more comparable to A Machine For Pigs although unlike that one, this gets the creepy feeling and dreadful foreboding atmosphere right!
I enjoyed the first half of the game. It was immersive and had really scary moments. Like a much more polished experience of the first Amnesia.
After some time the constant darkness just gets really really annoying. It is not scary when you can't see anything. The exploration part of the game is not fun or interesting when you are barely able to see anything.
I hated the last third of the game. Boring alien ruins which I find hard to immerse myself into, and a lot of sneak-through-this-room-with-an-annoying-enemy scenes.
The story felt rather shallow.
Played this game while pregnant myself (probably not the wisest idea), though I did so in Adventure mode and watched the original gameplay on youtube. It is better than the previous Amnesia instalments but not as good as SOMA which came before it, all of which I played in original difficulty. If played in original, I think the darkness can get quite stressful sometimes and there are areas in mid-game with too many monsters, though some people may enjoy this. The story felt a bit slow in the middle and rushed at the end, and I can pick a few holes in it, which I will not mention to avoid spoilers.
I think the Amnesia story and darkness mechanic is a bit exhausted after this (I know there is one more, but I will not be playing that one). The team should create new stories, like the five star SOMA they did, but that is just my opinion.