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I finished the game, yay! As I've mentioned before, this is a spooky atmospheric puzzle game, very stylized in grayscale with splashes of red, and a sort of phase-shifted overlay effect that makes everything look a little unreal. You play as a mysterious woman who has come to a mysterious hotel full of locked doors somewhere in Europe (Italy? Austria? Germany?) in 1963, at the request of a mysterious man for reasons of ??? The gameplay is very simple: you move with either a controller stick or arrow keys, and you have a single action button to interact with whatever is highlighted in front of you, or if nothing is, to bring up your "introspection" screen that includes inventory, "photographic memory" (images of everything important you've interacted with, text from books/documents/signs you've seen, etc), and "mental notes" which is where your quests, so to speak, show up, e.g. "Unlock room 1957" or "Broken elevator?" The game manual - once you find it :-) - is minimal, and a lot of the game consists of figuring out how you need to figure out the game. The story also makes little sense and is mostly vibes until you accumulate more information, as putting the story together is in some sense the point of the game.

The puzzles are mostly a matter of figuring out codes to open locks (doors, safes, puzzle boxes, computer logins) based on information that is usually near the lock, but may require extra information from books, letters, or other documents in order to transform into the needed code. Some things rely on Greek letters or Roman numerals; some rely on perspective or rotation or other transformation. Usually if I couldn't figure something out, it meant I didn't have the necessary auxiliary information, though sometimes I had it but didn't realize it was the missing piece.

I found the overall game structure really interesting, in that it's sort of separated into informal stages where there are a number of places you can go and things you can do (and a few things you can't do yet and can't figure out at all, e.g. a statue with a hole in it where obviously something is meant to go but you don't know what, or a room you can see but not enter) and within that, you can do things in any order you like, it's completely nonlinear. And then either something you do triggers an event which opens up additional places you can go/things you can do, or you solve a puzzle that gives you a key (possibly literally) to open up a new area. However, sometimes (probably often!) you receive access to a new area before you've solved everything in a previous area, though in order to fully progress the game you'll need to go back and solve whatever you missed. My brother and I compared notes occasionally, and marveled at how we often did things in completely different orders! For example, there's one area called the "Quiz Club" where you have to answer questions about in-game things in order to progress, and to get to it, you need to solve a puzzle that you have access to from fairly early in the game. My brother got there long before I did, because I missed that puzzle entirely until much later, but he was only able to answer a few of the questions, since he hadn't encountered the answers yet; by the time I got there, I was able to get through the whole thing fairly easily.

I did a bit more than 95% completion (there are some optional things you can do, some of which I chose not to) and finished in about 25 hours, which is probably dead slow, but I'm a slow gamer. I have 9 pages of notes - the facts and diagrams are of course saved in "photographic memory", but I wrote some things down so I could refer to them while in the game without having to access it (and sometimes it's not available, so you have to either remember or take notes). Also a few photos I took with my phone, heh.

The game is pretty inexpensive on Steam and goes on sale periodically (at the moment it's $17.49). As I mentioned in one of my updates, there is a really excellent hint guide on the steamcommunity.com site, which gently nudges you in the direction you should be thinking in order to solve the puzzles, rather than providing answers. You can pet the dog! You can drink espresso (after solving a certain puzzle...)! If you like puzzle games of this sort, I recommend this game!