History NightmareFuel / Undertale

* Meta, but belongs here anyway. Normally, doing an uninstall and fresh reinstall of the game would remove the effects of this route. However, as of recent, if you bought the game on Steam and uninstalled to wipe away the effects, too bad... ''[[ParanoiaFuel Steam Cloud keeps track of it.]]''[[note]]The other methods of removal still work, though.[[/note]]

** There are also unused sprites for Asriel in the ''Undertale Art Book'' that have a few [[NightmareFace nightmare faces]]. Asriel's mouth opens [[UncannyValley far too wide]] and he suddenly has a lot more teeth that are needle-sharp. His final form also used to be completely skeletal, with Flowey's creepy faces at various spots on his body.

* The conversation with Sans at Grillby's seems like a funny event at first, when he starts talking about Papyrus' quirks to enter in the Royal Guard, then time suddenly freezes around him and your character when he asks them if they heard of... a talking flower. Sans then starts talking about Echo Flowers, before mentioning one that gives his brother advices and premonitions. If you know Sans, you can only wonder if he legitimateely asks them the question or if he already knows and tries to see what they know or not. [[https://www.youtube.com/watch?v=sQDiDDb1_9k The theme playing]] is frightening too, being a simple, slow piano loop of Flowey's theme.

** There are many fanarts depicting this very phrase, but [[http://flargahblargh.deviantart.com/art/You-Feel-Your-Sins-Crawling-570165601 one captures the moment pretty accurately.]] Long story short, you feel the bloodied arms of the characters you have killed grasping your back.

* Flowey's laugh is..l [[HellIsThatNoise not a pleasant or comforting sound]]. It gets far worse when you fight him at the end of a neutral run.

Despite being billed as a cute and quirky RPG, ''Undertale'' is incredibly scary at points, featuring some stuff that will downright traumatize a child… or an adult, for that matter.

** He then goes on to talk about how the two of them, together, are going to kill everyone and everything in the world, and to cap it all off, [[https://www.youtube.com/watch?v=ktQ8zVoRgSo he says this line]]. And we ''do'' mean [[SuddenlyVoiced "says"]].
--->'''Flowey:''' Hmm... that's a wonderful idea!

*** Flowey claims he "already [[{{Forshadowing}} CHOSE]] that name," like how he capitalizes SAVE.

*** Flowey claims he "already CHOSE that name," like how he capitalizes SAVE.

** As if the idea of the Fallen Child planning their own suicide and the murder of humans isn't bad enough, they kill themself by eating buttercups and poisoning themself. If you know the symptoms of buttercup poisoning (bloody diarrhea, excessive salivation, abdominal pain, severe blistering of the mouth, mucous membranes, and gastrointestinal tract), it's incredibly unpleasant and painful, and their death was most likely [[CruelAndUnusualDeath slow and agonizing]]. Even worse, imagine being Toriel and Asgore [[AdultFear seeing their adopted child agonizing this way for days]] and being powerless to stop it.

*** Input "Chara" and the game calls it "the true name". Given just ''who'' you're naming, this makes a worrying amount of sense.[[note]]"Chara" is actually the name used in prerelease material and by default if you edit the save file to skip the naming sequence, and likely just stands for "Character". Many fans are still using this to represent the Fallen Child, though.[[/note]]

*** There is a reason behind the most comical attacks: the weapons you find in the game are ballerina shoes, fighting gloves, a book, a toy sword, an empty gun, and a frying pan. They used to belong to the previous six humans who died before you, and whose [=SOULs=] the last boss just absorbed. The weird attacks like the ballet shoes or the frying pan throwing fire are basically Flowey channeling the spirit of those previous [=SOULs=].

** The "aborted Genocide" ending, where Alphys is forced to take command after you kill nearly everybody: everyone is worried for their lives and [[TheApocalypseBringsOutTheBestInPeople Alphys makes her best to calm the situation]]. However, during the call, she cracks a bit. It is disturbing to hear her of all people threaten you so coldly.

** The "king Mettaton" ending is CrapsaccharineWorld at its worst: Mettaton is an incompetent and narcissistic ruler who abuses his status [[BreadAndCircuses to brainwash people with his TV show]] and wastes public money to glitter gold everywhere and build monuments to his own glory. If Papyrus is still alive, he mentions things don't go well for those who don't worship the new king. [[FridgeHorror What happens to them exactly?]]
** The creepiest may be the ruler less ending: you practically killed every monster but did not commit Genocide, [[NothingIsScarier you only hear a blowing wind]] behind Sans' voice, and he heavily implies the Underground has fallen into despair.

-->'''Asgore:''' Now, now. There's no need to fight. Why not settle this...[[SpotOfTea Over a nice cup of tea?]] [''slash, as he collapses to his knees and his eyes erupt with pain''] Why... You... [''Flowey's unavoidable pellet attack surrounds him as he looks on in terror, before it kills him'']

Despite being billed as a cute and quirky RPG, ''Undertale'' is incredibly scary at points, featuring some stuff that will downright traumatize a child... or an adult, for that matter.

* If you do kill Toriel in the demo, the song [[http://undertale.wikia.com/wiki/Empty_House "Empty House"]] plays. It's...unnerving as hell if you go back into Toriel's home to see it completely desolate. It was even included in the official game. If you do turn off the lamp in the guest room, it makes it more disturbing.

* Flowey's laugh is...[[HellIsThatNoise not a pleasant or comforting sound]]. It gets far worse when you fight him at the end of a neutral run.
* If you backtrack a bit after certain points, you can catch Flowey quickly retreating underground. He's been stalking you the whole game. And following you all the way up to the end of the game. On a run where you spare Toriel, find him in the last Waterfall Echo Flower field then talk to the Echo Flower he was just next to. You hear what sounds like Toriel looking for you...but in reality, it's Flowey imitating her voice, then taunting you about how she'll just forget about you the moment she finds another human child. Finding out who Flowey really is adds another layer to this. It's Asriel projecting his own fears and bitterness at the loss of his parents to mock you. If you decide to kill Toriel instead, then Flowey will instead imitate Toriel sounding horrified, wondering where she is, followed by him saying "... [[ArcWords But nobody came.]]"

** Speaking of this... Flowey claims to have exhausted every possible option he could think of when it came to killing and sparing before the player showed up. This means that while he's done his own equivalent of a Pacifist run, he's also done pretty much every possible Neutral equivalent you could think of, including some ''very'' dusty ones, and has killed everybody in the Underground multiple times. ''[[SelfMadeOrphan Including his own parents]]''. Even if we take the comment that Sans caused him "his fair share of resets" to mean that he never properly finished whatever his version of a Genocide Route would be, it still means that Flowey at least attempted it a few times and [[NearVillainVictory would've gotten away with it had Sans not stepped in]]. Both heartbreaking and terrifying, indeed (It also counts as a bit of a CMOA for Sans since we know how determined he is to save the world when he feels that no one will survive, especially when his brother is in the crossfire).

* His EstablishingCharacterMoment, one of the first things that happens in the game? He tricks you into taking hits from his bullets then laughs at you for being naive (complete with one of his patented nightmare faces and distorted font), then he tries to kill you, even yelling "[[PrepareToDie Die.]]" And that's only if you get hit by them -- you can avoid them and annoy Flowey. While amusing at first, the music gets increasingly distorted and low-pitched and Flowey's anger becomes more apparent, with him even saying "bullets" before looking at his own text box and changing it back to "friendliness pellets". If you avoid them all, either because the situation seems creepy or you started the game over, he says, "You know what's going on, don't you? You just wanted to see me suffer", before shrinking the box your soul is in and attacking you.

* Sparing Toriel when you have killed other monsters in the Ruins... interesting dialogue from our old pal Flowey.
-->'''Flowey:''' Clever. Verrrryyy clever. You think you're really smart, don't you? In this world, it's kill or be killed. So you were able to play by your own rules. You spared the life of a single person. Froggit, Whimsun. Vegetoid, Loox. Migosp, Moldsmal. Think about those names. Do you think any of those monsters have families? Do you think any of them have friends? Each one of them could have been someone else's Toriel. [[YouBastard Selfish brat]]. [[WhatTheHellPlayer Somebody is dead because of you]].

* Toriel's reaction to when you OneHitKill her. She'll ask if you really hate her that much... and then [[https://imgur.com/ASc96T2 gives a rather unnerving smile]], realizing she was never protecting you from the monsters outside of the ruins, but rather them from ''you''. She laughs before she turns to dust. It's equal parts upsetting and unsettling to see [[CoolOldLady Toriel]] die LaughingMad and essentially cursing you in her last moments.

--->'''Toriel:''' To think I was worried you wouldn't fit in out there... Eheheheh!!! You really are no different than them!

-->"Hahaha... You're not really human, are you? No. You're empty inside. Just like me."

* It's a small detail, but the few comments we get on the child's appearance throughout the genocide route consistently give the idea there's something ''very'' wrong with their appearance. While Sans' request of the child to keep pretending to be a human [[YouMonster is probably a jab]], the scene where Papyrus is able to guess them to be a human in any other route while Sans jokingly notes the rock's presence instead is inverted, with Papyrus now only mentioning the rock and seemingly not even noticing the child standing ''mere feet away from him'' before Sans points it out. By the time you reach Asgore, he asks them what the kind of monster they are - this [[YouMonster would definitely seem like a guilt-tripping question under most circumstances]], but from how he offers you tea immediately afterwards, it's clear that Asgore is ''genuinely unable to identify'' what kind of creature the child is. This is the only acknowledgement of it we're really given, and the child's in-game sprite remains the same even to the very end. ''[[NothingIsScarier Exactly what the hell are these characters seeing that we can't?]]''

* In earlier builds, during the scene where Undyne is searching for you, [[https://youtu.be/kXVDKW-HpPM?t=1h36m34s Papyrus's sprite might show up as a glitch]] even though ''he's supposed to be dead by this point in the run'', and just stays there the entire time during the dialogue-free cutscene even as Undyne fades out of view. It's definitely... creepy, to say the least...

** There're many fanarts depicting this very phrase, but [[http://flargahblargh.deviantart.com/art/You-Feel-Your-Sins-Crawling-570165601 one captures the moment pretty accurately.]] Long story short, you feel the bloodied arms of the characters you have killed grasping your back.

* There's something deeply disturbing about the cutscene after defeating Sans. [[WildMassGuessing What appears to be]] ''blood'' comes out of him, something no other monster is ever shown with due to monsters being explicitly stated to be made of dust. On top of that, besides [[IWarnedYou a brief-yet-ominous warning of what's to come]], he seems utterly detached from reality in his final moments; instead of commenting on his death or you being well over the MoralEventHorizon at this point, he just casually says he's going to Grillby's, even though the place -- along with most of the underground -- is empty at this point. And then he asks his brother if he wants to come along for food, even though you killed Papyrus some hours ago.
-->'''Sans:''' so... guess that's it, huh? just... don't say I didn't warn you. (''stands up'') welp. i'm going to grillby's. (''[[TheDyingWalk slowly shambles off the screen]]'') papyrus, do you want anything? (''dies offscreen'')

* If you CHECK either one of the two guards, the description for them doesn't show stats. Instead, it says that the protagonist is mocking them for trying to stand in their way. Beyond just being very dark, it also suggests the protagonist already knows the guards are lovers, and takes even more pleasure cutting them down over it.

* Attempting to reload the game after finishing the No Mercy path simply results in a black screen, along with a sound effect of blowing wind. You did, after all, allow the world to be destroyed. After ten minutes pass, The Fallen Child reappears and, after pointing out that this whole thing was your fault, offers to restore the world to the way it was... if you'll sell them Frisk's SOUL. Doing so will taint any future playthroughs, as the Fallen Child possesses Frisk — even doing a True Pacifist run will result in the fallen human taking over at the very end.

** Considering the fact that the world is already completely erased when Chara asks for "your SOUL", it can be taken to mean that they don't mean Frisk's... but [[TheFourthWallWillNotProtectYou yours]].

** The Dog amalgamate, Endogeny, doesn't have a face, but a single black hole that takes up most of its head. Its battle music is rhythmic dog barking, which sounds like low, demonic tribal chanting and gives you the feeling of being hunted...

** The way it's done is rather disturbing, as well. You find a [=TV=] with some tapes next to it, and there's a note saying that these videos probably shouldn't be watched. The first one is [[MoodWhiplash a rather cute]] video of Toriel and Asgore telling each other puns... But then they slowly turn into Asriel and the Fallen Child's plan. The final one even has Asriel sounding scared and getting reluctant to go through with it, but [[ForegoneConclusion obviously that didn't work out well]].
* The shaking fridge? So far everything odd we have seen shows up in threes, and when you enter the room with the fridges, what do you know, the third one is shaking every few seconds. That's creepy enough on its own. It's also a dead giveaway that there's something inside, right? Most people will check the first two for items, skip the third, and check the rest first — except, when you get near the last fridge, ''that'' one becomes the amalgamate. So... once you're done with that, you go back to investigate the third fridge... and it tells you "it's empty." And it's still shaking. What...???

* To get one of the keys, you have to approach a tub with the shower curtain pulled around it. Inside, you can see the shadow of... something, which looks like a single tentacle, moving back and forth like a metronome, making a creepy sound when it does. When you walk toward it, it starts moving faster and making more frantic sounds, but you can only move at a snail's pace, no matter what you do. Finally, when you get to it, and pull the curtains back... [[NothingIsScarier all that's there is the key, and the room is silent]]. Interact with the tub again, and it will say "Just an empty bathtub." It doesn't help that the wording makes it sound like you're just trying to reassure yourself that it's nothing...

** So, basically, Flowey either fused with or based his appearance off the determination extractor. Assuming he did this for a reason, one shudders to think: Just what was he planning to do to Frisk, let alone the rest of humanity, in that form?

--->[[YourApprovalFillsMeWithShame '''I knew you had it in you!''']]

** As if the idea of the Fallen Child planning their own suicide and the murder of humans isn't bad enough, they kill themself by eating buttercups and poisoning themself. If you know the symptoms of buttercup poisoning (bloody diarrhea, excessive salivation, abdominal pain, severe blistering of the mouth, mucous membranes, and gastrointestinal tract), it's incredibly unpleasant and painful, and their death was most likely [[CruelAndUnusualDeath slow and agonizing]].

* The Neutral endings are bittersweet at best and heartbreaking at worst. If it's a Neutral run where you killed Undyne and/or Mettaton and Alphys doesn't rescue remaining monsters from the walking apocalypse you are (which she does on both a Genocide Run and an aborted-Genocide Neutral Run), it is heavily implied [[DrivenToSuicide she committed suicide in the True Lab]]. Outside of this, however, three endings take the cake:

-->[[TranquilFury "I really should have killed you when I had the chance."]]

** Looks like [[https://youtu.be/3Fbr7aLqlSA?t=10m13s Will Ryan]] of DA Games has this happen to him on his Neutral Run as well. As a bit of NightmareRetardant, the wiki says this is a rare bug. Doesn't mean it's not still {{nightmare fuel}} though, since when it ''does'' happen, it is almost never expected.

* While fighting Sans, the dialogue itself will contain an ominous message: "You felt your sins crawling on your back." It's not just creepy because of what it's saying, it's also creepy because of the the fact that what it's saying is ''actually too true: Sans is BreakingTheFourthWall''!

*** There is a reason behind the the most comical attacks: the weapons you find in the game are ballerina shoes, fighting gloves, a book, a toy sword, an empty gun, and a frying pan. They used to belong to the previous six humans who died before you, and whose [=SOULs=] the last boss just absorbed. The weird attacks like the ballet shoes or the frying pan throwing fire are basically Flowey channeling the spirit of those previous [=SOULs=].

** The one song that plays ''only'' after completing a Genocide is an [[https://www.youtube.com/watch?v=93q3irqZxxo unnamed track]] that plays when encountering the Fallen Child at the end of the route. It's a terrifyingly minimalistic track, made up of horror-movie like trilling noise playing over the sound of a deep, slow [[HeartbeatSoundtrack heartbeat]]-like noise.

* The Neutral endings are bittersweet at best and heartbreaking at worst. If Undyne doesn't work with Alphys or if she doesn't rescue remaining monsters from the walking apocalypse you are, it is heavily implied [[DrivenToSuicide she committed suicide in the True Lab]]. Outside of this, however, three endings take the cake:

* Imagine this — you've 100% completed the game and you feel like traversing through the files. While looking through the .ogg's, you find one called "[[https://www.youtube.com/watch?v=x_WUCvYkRyc abc_123_a.ogg]]". Expecting some kind of unused soundclip or just a strange name for an already existing one, you open it up... Instead, you're greeted with some ominously, creepy and disoriented Text-To-Speech voices from FLStudio, threatening you 'not' to spoil the game.
-->Hello. Ha-ha-ha-ha-have some respect and don't spoil the game. It's impossible to have mysteries nowadays because of nosy people like you. Please keep all of this between us; If you post it online, I won't make anymore secrets. ''No one will be impressed.'' '''It will be your faaaaaaaaaaaaaaaaaaaaaaaaauuuuuuuuuuuuuuuult.'''

---->"Long ago, two races ruled over Earth: HUMANS and MONSTERS. One day, '''they all disappeared without a trace.'''"

*** Even more unsettling: threatening you is the only time Sans "speaks" with proper capitalization. The only other time this happens is when you get the phone call from Asriel, in the elevator up from the True Lab, and the narration — possibly Chara — reacts to hearing "a voice you don't recognize". Are Sans and the Fallen Child connected somehow?

** Given the dark themes of the Genocide route, some could interpret this as Papyrus' ghost manifesting and trying to warn Undyne but couldn't reach out to her.

* In earlier builds, during the scene where Undyne is searching for you, [[https://youtu.be/kXVDKW-HpPM?t=1h36m34s Papyrus's sprite might show up as a glitch]] even though ''he's supposed to be dead'', and just stays there the entire time during the dialogue-free cutscene even as Undyne fades out of view. It's definitely... creepy, to say the least...

** Speaking of this... Flowey claims to have exhausted every possible option he could think of when it came to killing and sparing before the player showed up. This means that while he's done his own equivalent of a Pacifist run, he's also done pretty much every possible Neutral equivalent you could think of, including some ''very'' dusty ones, and has killed everybody in the Underground multiple times. ''[[SelfMadeOrphan Including his own parents]]''. Even if we take the comment that Sans caused him "his fair share of resets" to mean that he never properly finished whatever his version of a Genocide Route would be, it still means that Flowey at least attempted it a few times. Both heartbreaking and terrifying, indeed.

*** It's possible they use this phrasing because they're Shyren's sister and a Moldbygg, two creatures extremely concerned with their personal space, [[AndIMustScream being fused with someone clingy like Aaron's brother]]. On the flip side, Aaron's brother is [[IJustWantToBeLoved probably very used to physical affection and is in desperate need of it, but is currently fused with two other creatures that despise him for that]].

* Imagine this — you've 100% completed the game and you feel like traversing through the files. While looking through the .ogg's, you find one called "[[https://www.youtube.com/watch?v=fJlPupH0Gr4 abc_123_a.ogg]]". Expecting some kind of unused soundclip or just a strange name for an already existing one, you open it up... Instead, you're greeted with some ominously, creepy and disoriented Text-To-Speech voices from FLStudio, threatening you 'not' to spoil the game.