In his Easter Egg appearance, was the Purple Guy stuffing a victim into a suit, or merely helping a fellow employee put it on? If it's the latter, was he just doing it as part of his job, or (since 2 revealed that a yellow suit was used to lure the children into the back) was he trying to frame another employee for his murders?
In the Night Two minigame, did the person in the Fredbear suit intentionally scare the child by following him, or did he just see that the child was upset and come over to try and help, accidentally scaring him?
Fredbear himself. Despite the Nightmare Animatronics terrorizing the poor child, Fredbear — or at least the plush of him — seems to try to console the child, even going so far as to say that he and the others want to fix the child after he suffers the Bite. Is this actual good intentions... or just a precursor to the nightmares faced in gameplay? (Or good intentions gone (literally) nightmarishly wrong?)
Author's Saving Throw: All of the format changes story and gameplay wise are almost certainly Scott invoking this trope to please the fans who were concerned that this franchise was becoming bland, repetitive, and by the numbers.
Big-Lipped Alligator Moment: The mini-game where the child is locked in the Parts room, with several animatronic heads. We are never given an explanation for this, who locked him in (it's implied to be the brother), what day or time it is, and it doesn't add anything to our comprehension.
Smaller versions of Mangle's pieces randomly laying around in the kiddo's house. There's no buildup to it whatsoever, and is never acknowledged later. The Halloween update gave us a Nightmare Mangle, though.
The Chris Carter Effect: Has been accused of this by some of the fanbase. Many were hoping that the fourth (and at the time, last) game in the "Five Nights" series would at least answer one or two burning questions surrounding the lore, like the Purple Guy's identity or the infamous Bite of '87. Instead, people were left even MORE confused than ever. Scott announcing he wouldn't open the box didn't help at all, alongside the Halloween update being Palette Swaps and not much else.
Creepy Awesome: The Nightmare animatronics look damn cool, but still more or less horrifying.
The box has become a metaphor for us as a community. Scott states how almost all of the lore for FNAF 1 - 3 has been found and when FNAF 4 came, the community looked too hard for easter eggs and misinterpreted the information given in plain sight. Because we as a community can not as a whole settle on events (I.E. the Bite of '87 OR the bite of '83) the community refuses to set on specific beliefs. And so because of this, the story isn't being figured out as it should, which is why the locks will remain, forever. Until we can all agree, the box will never be opened.
Fan-Disliked Explanation: After the game's release, Scott had planned to allow a means of opening the mysterious box at the end of the game, which he claimed had "all the pieces [of the story] put together," but went back on those plans to avoid having it be one of these. Given later clues on his website heavily implied the series was All Just a Dream (as opposed to only the fourth, which had already been established as an extended Nightmare Sequence), the fans weren't too keen on this possibility. Notably, the next few games in the franchise completely ignore this twist, if it was what Scott had in mind all along.
Typhoon Cinema made a video including a small Springtrap plushie. Come the seventh teaser◊, there's a small Springtrap named Plushtrap; he's even sitting on a chair, just like in the video.
Thesevideos are even more hilarious as the cupcake can now jumpscare you. Bonus points as the cupcake in the video has teeth like its nightmare design
Way back in the first game's Custom Night, players would set the animatronics to 1-9-8-7 in hopes of finding out more information about the Bite of '87, or even play during the day/night of the event, only to have it trigger Golden Freddy's jumpscare before crashing the game. At the time, people just assumed Scott was acting as a Trolling Creator, but since this game shows that Fredbear/Golden Freddy actually was the cause of the Bite of '83, perhaps fans actually did get a clue about the event they were hoping for.
People loved to make joke theories about how the cupcake was actually a persisting threat in the games. Now it really is.
The subtitle of this game is "The Final Chapter", presumably named after the Friday the 13th film with the same name, which was decidedly not the final chapter in that franchise. Come Five Nights at Freddy's: Sister Location, and the game's subtitle is parallel with the film's.
Harsher in Hindsight: The "Don't touch Freddy" rule in the first game now makes so much more sense thanks to this game.
The Child's brother. He's terrorized his younger brother by playing off his fear for the restaurant and taking him there multiple times, even though he knows his brother hates it. During his birthday party, he and his friends take him on stage and places the Child's head in the animatronic's mouth. As soon as the animatronic closes its mouth on the Child's head, the brother and his friends stop laughing. Although the brother is remorseful about what happened, it still doesn't excuse him for what he did. He and his friends should have known something like that would happen. It's also been theorized that, in the main game, you in fact play as the big brother rather than The Child, meaning he possibly has to deal with these monstrosities as well as his own guilt.
Upper Management for Fredbear's Family Diner/Freddy Fazbear's Pizza also qualifies. They may be a lousy business that lacks compassion for their employees, but no place deserves a serial killing employee AND a horrific accident caused by terrible customers. Their downfall is a Foregone Conclusion.
Love to Hate: The jerkass older brother, at least for the first five mini-games. He may have apologized after Night 6, but he's directly responsible for the Bite of '83 and likes to terrorize the protagonist on a regular basis. No Draco in Leather Pants for him.
Loads of people have joked about the "Final Chapter" tease, as the Friday the 13th franchise used "The Final Chapter" as a subtitle for its fourth (and decidedly not-final) entry. Especially true when Scott ended up making a new game in the series after all.
Comparisons to Silent Hills, given the timing of its cancellation and FNAF 4's first teaser, have also sprung up.
When first revealed, fans described Nightmare Freddy as a mechanical Multi-Bear. or as an animatronic bear version of Giygas, earning him the Fan Nickname of "Giygas Freddy".
Nightmare Freddy is also subject to jokes about being a single dad, with the Fredlings as his children.
The promotional images of the Nightmare animatronics slightly hidden in shadows with the caption "Was it me?" spawned numerous parody images with characters such as the fan, Vince McMahon, Dio Brando, and others taking the place of the animatronics.
"WHAT'S IN THE BOX?!" came about shortly after people first began beating the game and gained a lot of traction after Scott's decision to keep the box closed.
When Scott "confirmed" Mangle's gender via Mathematician's Answer, fans starting joking about its gender literally being "yes" and identifying their own gender as "yes".
The new animatronics being more overtly monstrous in design compared to the previous games has evoked this opinion for some of the fanbase, feeling the new animatronics to be too over-the-top to be legitimately scary. Then again, maybe this is on purpose — you are playing as a child, and many kids have rather bloated imaginations that can make some things we don't find scary terrifying for them. Also justified, as it's all but stated that the Nightmare animatronics are exactly that: manifestations of the child's deepest fears. Thus it makes sense for them to look as horrific as they do.
Some people think Plushtrap is just too cute and/or small to be scary or threatening, more likely to tickle you than maim you. Doesn't help that 'plush' is commonly accepted as the cuddliest term for a stuffed animal.
The Nightmarionette, introduced in the non-canon Halloween update, is rather creepy, but it's a bit spoiled by the Extra menu presumably chopping its name down to the bizarre "Nightmarionne".
Jack-O-Chica's jack-o-lantern manages to be even less scary than the Nightmare Cupcake.
Nightmare Mangle◊ looks horrifying. Their endoskeleton, though, has plenty of sharp teeth too...but retains the googly eyeballs.
Some have interpreted the Nightmarionne's killscreen as the demonic puppet being totally high, due to its bloodshot, unfocused eyes.
Nightmare BB probably could have been a lot scarier if Scott made him damaged like the others, but while he's certainly unnerving, he's just as pristine as the real Toy animatronics without a single flaw on his bright plastic exterior.
On the subject of Nightmare BB, his half-lidded eyes, and pitched-down "Hello?" and "Hi" make him seem more like a bored teenager than a creepy animatronic.
The game is set inside the main character's house. Not a job that can be escaped, but a house and they can be in the hallway, in the closet, anywhere. The character isn't safe in his own home.
Picture it this way: A child is left home alone at night with a bunch of robots that want to harm them, said robots have slaughtered numerous big and burly adult security guards. This child has to last six hours against these things for at least five nights in a pitch black house, with a flashlight as his only means of seeing anything.
The breathing mechanic. Basically, animatronics that are in front of your door will breathe heavily, and this is a signal to not use your flashlight and hold the door closed until they go away. Of course, this means that every time you go to the door- which you'll be doing A LOT, you stare out into the inky blackness, hoping and praying that nothing is there. If you hear breathing, then you're half a foot away from the jaws of one of these monsters, and even flicking on that flashlight for a second will kill you. Choose wisely.
For Real Life: you are trapped with an older sibling who uses your fears against you, will terrorize you on a regular basis, and leave you trapped in a place where children and employees have died, and ultimately leads to you receiving a serious injury. And given the time period, the 1980s, Social Services Does Not Exist and There Are No Therapists for the child protagonist.
Porting Disaster: While all of the games in the series have had a problem with frame-rate drop in their mobile ports due to the limited power of most phones/tablets, it is especially noticeable in this game due to the constant movement and running around you have to utilize as opposed to flipping through an array of static camera screens with the only animation being on the animatronics' kill screens. A subdued version of this trope, to be sure, but still a hassle.
In addition, this game also eschews the story related mini-games that take place between nights, a la Five Nights at Freddy's 3 (the latter still has the Toy Animatronic mini games, but without the Purple Guy ones it loses a lot of the context). Normally this wouldn't be an issue if it weren't for the fact that the story is only told through those mini games since you don't have someone calling you every night and talking to you like the last three. To say this has caused a bit of He Changed It Now It Sucks reactions would be an understatement.
Scrappy Mechanic: Before the v1.01 patch that increased the breathing volume to much higher levels, many people disliked the crucial game mechanic of having to listen for breathing to know an animatronic is nearby in the hallways, in order to close the door and wait for them to leave. It was previously very troublesome for the hearing impaired, and a fair amount of Let's Players who were shown during gameplay videos to not actually be able to hear anything no matter how long they waited for the breathing to appear, due to the actual noises being rather inaudible if one didn't intently listen to it. Previously the only solution was to turn the volume up, which would only cause more problems if players were given the noisy jumpscare anyway.
Some Anvils Need to Be Dropped: The game gave a pretty forward anvil: Bullying has damaging effects on a child. Because no one stepped in—not the parents, not the other kids, no one—when the older brother kept tormenting the child, the bullying went too far and now the kid is physically and mentally scarred for the rest of his life—which may not have lasted much longer. The entire game and its sad ending could have been avoided if the older brother hadnt been bullying the younger one. Not only that, but one person standing up for himself doesn't guarantee anything. Others have to join in.
Nightmare Balloon Boy is this to some members of the fandom due to his unscary appearance and minor role.
Ugly Cute: Plushtrap is a Fun Size plushie version of Springtrap, the third game's antagonist which was already pretty monstrous to begin with. But, just look at him. Isn't he adorable?
Uncanny Valley: Plushtrap is a Creepy Doll version of an already fiendish-looking animatronic, who in turn has really strong ties with the franchise's most wickedcharacter. The combination couldn't be more perfect. What really sells it is the disturbingly human-like eyes.
The Nightmare Puppet is really disturbing now due to its Ghostly Gape in place of its previous expression of malicious joy. Not to mention the hidden, incredibly realistic eyes it sports.
Villain Protagonist: If you interpret the game as the PTSD-induced nightmares of the older brother, not the coma dreams of the child from the minigames.
What an Idiot!: An odd version. While no one would expect Fredbear to chomp the kid's head, what exactly did they think would happen to the kid or Fredbear if they jammed his head in there?
Win the Crowd: A lot of people weren't happy with there being a 4th game in the series, especially after how perfectly the third game ended; others thought that the series was already stretching and Scott was just milking it for all its worth at this point or the new designs just looked stupid. When the trailer came out and people started to get their hands on the demo, a lot of people started to warm up to it after seeing its setting and its mechanics. The jumpscares were now rendered with the room just like they were back in the first game, pleasing the people who disliked the second and third games' jumpscares due to their sprites being a separate render and causing all kinds of graphical goofs due to the games' perspective camera. Also, 4 turned out to be a prequel to 3 , and did not overwrite3's ending.
The protagonist is a kid who is under attack in his own home by the nightmare animatronics and is treated as an outcast by every other child he encounters because of how timid he is. And then there's all the shit he gets from his older brother, eventually culminating in the Bite of '83. This kid practically defines this trope.