I Start by saying that the game is entertaining, also if the mechanics are repetitive like hell.
By a gameplay stand point there are few things that I really don't liked
MECHANICS
1.For the entire game you will find yourself going up and down in the patient rooms using your recorded conversation, watching and playing flashback.
I've read some people complaining about that because they have to hear the conversation again and again. Guss what? just press the escape button two times to skip dialogs and every long action in the game, David will make you know that the recording played was right saying "mmmhh".
But there isn't always a logical connection that make you think that you have to go in the room number # and play the record number # to trigger the patient. I've used a walkthrough at some point.
2.Things are triggered only when you do a specific action, this is a bit hard to explain.
But let's say that I have a torch, and I need to turn it on in a dark room that is enlightened, obviously I need to switch off the light in the room using the control panel. That is easy, but the game doesn't let you do that, indeed the NPC will tell you to "fuck around and don't touch the control panel". And guess why? I need to go in to the room when the light is still on, then turn on the torch light so that David will say something and only then I will be able to switch off the light using the control panel, without being stopped by the NPC, that for just a second has changed his mind with no reason at all.
Also sometimes impredictable events, impossible to knows, need to happen to continue the game.
STORY
I will say that there are so few characters in this game and they seems to me much more a bunch of robots than humans, but the story is entertaining until the final chapter, oh god the final chapter, it's just the end of the world with that nonsense honeyed ending. Just a pile of shit, IRREDEEMABLE. All the protagonist development is throwed in the toilet with the story.