Massive improvement over Security Breach. It's actually surprisingly solid, if a bit short, and I found the ending reveal cutscene really cool (until Roxy showed up. too cliche and ruined the mood instantly).
But it's extremely fucking weird, even though has a much more solid plot than SB, as far as the ingame objective and the idea, even though its pretty obvious, it just doesn't really make sense to me, it doesn't really tie in to SB at all apart from the overall setting and characters. It's just difficult trying to see the relation between the two beyond that.
I realize it is FNaF, so it is meant to be cryptic schizo nonsense for internet autists to theorize over, and it follows this trend. There's a couple endings, all of them are very strange and blue-balling. Clearly a sequel is intended.
But honestly, I think they just retconned the whole of SB after people shat on its retarded plot and like the shit with Vanny, the blob and the return of Afton (who don't appear at all in ruin) and that whole thing with Freddy's schizo "i'm not me" rant.
AFAIK the stuff revealing the mimic was released after, so I'm pretty sure they just did that to salvage the game.
It does irk me how they used Freddy. IDK what the fuck is going on with that, but I don't like it. And that they teased Glamrock Bonnie so much but we never got to see him in game at all, not even what happened to him? Too lazy to make a model for him?
Also it seems they have decided Freddy and Bonnie are homosexuals, unless this is somehow meant in a platonic way (optimistic)

Very cringe and extremely gay.
Ontop of that the gameplay seemed a bit lackluster? I can't really say cause I only watched a video of it, but it really didn't look like there were too many cases with actual threats. Just a lot of """puzzles""" and exploring. If anyone here has played I will be interested in your opinion on that.
Edit:
I forgot to mention. I really liked how the AR stuff looks and the idea of the kind of parallel worlds. Reminds of the Golems of Amgarrak DLC for dragon age, which I love.