Alright, I finally finished FNAF Ruin. Now to talk about it.

So first the plot, and I am going to say the "warning" at the start where they say you should play FNAF: Security Breach before hand to understand what's happening... Is total bullshit. I played through FNAF:SB at least 3 times (to get achievements) and even with those play throughs I had no idea what was going on.

You play Cassie, a girl who was asked to come to the pizzaplex to save Gregory, the boy you play in FNAF:SB. Outside of Gregory and the setting NOTHING connects back to FNAF:SB from this point. I want to say that I immediately clocked Gregory as being fake, and spoiler I was right. "Gregory" guides you around the Pizzaplex, insisting that you disable a series of security nodes to save him, as he is trapped beneath the pizzaplex and can't escape while they are active. So you go from location to location, revisiting almost every location from FNAF:SB and encountering the glam-rock animations. The entire Pizzaplex is in ruin (Hey, like the name of the DLC!) but eventually you find all the nodes and make your way to an impossible basement to discover the twist... Are you sitting down? It's not Gregory! It's an animatronic that was pretending to be him to lure you into the cavernous impossible basement and trick you into freeing it.
But then, double twist, Gregory was actually looking for YOU the whole time! And, TRIPLE twist, the animatronics were trying to SAVE you from the evil one in the basement! Never once using their words to tell you that, and jump-scaring you when they catch you, and Roxy rushes in to save you, holding the evil animatronic at bay while you escape. Gregory and his mystery friend help you escape, only to, QUADRUPLE TWIST, actually have no intention of helping you and once he learns you freed the evil animatronic he literally cuts the elevator cables and drops you into a pit to die, then credits roll.
I had to google to figure out what the actual fuck was happening, turns out this evil animatronic was called "The Mimic" and is actually from the comics/books? And was never mentioned once in the entire game or in FNAF:SB. So... Clearly a fan-service villain because I felt nothing when I saw it, only confusion. I also felt nothing for Roxy when you have to "kill" her to disable the final security node, not that it matters because she gets over dying real quick to save you 2 minutes later.

So... Yeah, not the best plot, so let's talk game-play.

This is an entirely different game from FNAF:SB. In FNAF:SB it's an open world, in ruin the game is one long rail with next to no exploring. In FNAF:SB the animatronics are hunting you at all times, in ruin they barely show up at all. In FNAF:SB you have no way to interact with the world, in ruin the game gives you multiple tools almost immediately to do puzzles and interact with things. In FNAF:SB you can hide and stealth past animatronics, in ruin there is no stealth and no hiding at all.
There's more, but you get it. Totally different game. Another major difference is ruin gives the player a vanny mask, or the V.A.N.N.I. Mask, which allows you to defy reality itself. The mask allows you to view the world through AR (Altered/Augmented Reality, not Age Regression), while viewing the AR world you can literally walk through solid objects, make things appear or disappear, solve invisible puzzles, and in my case glitch through the map and end up in a void before dying. This is literal reality defying tech that never existed in FNAF:SB, and it is the most important item in the game, and the most dangerous. The primary antagonist in the game is a mysterious blue bunny figure that only appears while using the mask, it appears at random and if you get too close it will summon one of the other animatronics to attack you. This means the only time you are in danger is when you are wearing the mask, and you can easily get by the bunny thing by taking the mask off, which causes it to despawn. There are brief times when the game disables your ability to remove the mask, but they are rare and I never ended up getting caught even when I was forced to be wearing the mask.
You also get a key that allows you to do door puzzles and unlock the security nodes, I actually found the puzzles in this game to be very dumb, in that all you do is click once and wait for the meter to fill before clicking to the next meter. Another puzzle was... Follow the illuminated cord and hold E until the thing changes colour. And finally, draw a line between two objects to match them. All extremely easy puzzles. So you are on rails doing very easy puzzles, barely ever in danger.

So... The gameplay is also kinda crap, so what about the graphics? Well, buggy graphics aside, the normal non-AR graphics are fine. I don't buy the environments even for a second, but the game lives up to it's name and the building does come across as a ruin, mostly. I refuse to believe that cave at the end really exists, it's got to be a mile or more below the surface, a solid 2-3 minute long elevator ride, followed by about 10 flights of stairs, and somehow there's power down there despite the pizzaplex being condemned? Come on.
The animatronics also seem designed well enough as well. Monty is just the upper half of an endoskeleton now, chica is melting apart, Freddy has been decapitated and exploded from the inside out, and Roxy... is entirely unchanged somehow. Despite being burned by Gregory in FNAF:SB, and then the building being lit on fire at the end of FNAF:SB, Roxy is 100% unchanged form her endgame appearance from FNAF:SB. And for some odd reason is friendly towards Cassie.

What about the sound design? Well it was fine. Good enough to tell when something was chasing me, and where something was, but without spamming you with voice lines like FNAF:SB did.

So... How does it compare overall to FNAF:SB?

As I said, this is not a DLC, this is an entirely different game. However gun to my head and making me compare them, Ruin is marginally better. But I still thought both games were bad, and... Fuck Scott! He is an anti LGBTQ asshole who supported trump and donated tens of thousands to a lot of right wingers who hate LGBTQ people. He also claimed he donated to Dems, except one of the TWO he donated to he gave $5 to, and the other left the Democratic party and introduced anti-trans legislation in their state. Oops. But now I am free, I beat the game, the DLC, and can finally be done with this franchise.

Before anyone asks, no, I will not be seeing the movie. Fuck Scott.