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Undertale

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This page is a translated version of the page Undertale and the translation is 16% complete.

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Featured article


Title Screen

Undertale/es

Developer: Toby Fox
Platforms: Windows, Mac OS X, Linux, PlayStation Vita, PlayStation 4
Released internationally: September 15, 2015


AreasIcon.png This game has unused areas.
DevMessageIcon.png This game has a hidden developer message.
GraphicsIcon.png This game has unused graphics.
ItemsIcon.png This game has unused items.
MusicIcon.png This game has unused music.
TextIcon.png This game has unused text.
DebugIcon.png This game has debugging material.
SoundtestIcon.png This game has a hidden sound test.
Carts.png This game has revisional differences.


¿Qué estás haciendo?

¿Buscando secretos?

No pongas tu nariz donde no pertenece.

O podrías aprender algo que NO te guste.

Hee hee heeUndertale homepage, in the page's HTML code.

Hmmm...
To do:

Subpages

Undertale toby dog.gif
Debug Mode
Unfortunately, there are no insects to be found in this mode.
Undertale-unused spell sprite 2.png
Unused Graphics
There are so many dogs in this game! There's even UNUSED dogs!
Undertale room tundra rollsnow.png
Unused Rooms
From candy pedestals to talkative NPCs.

Mensajes del Desarrollador

Advertencia "¡No ripear los sprites!"

Version 1.00

¡...no lo hagas incluso si nosostros COMENCEMOS  a subir pistas de audio a BrawlCustomMusic!

Por favor no subas estos enormes sprite sheets online.
Solo porque la mayoría de las cosas raras de aquí SON UTILIZADAS, prefiero que primero sean vistas en su contexto.
Espera 1ro al menos un año.
Si solo estás ripeando los sprites vistos normalmente para sprite's resource o algo así no me importa si usas esos para hacerlo más fácil

abc_1111_0.png contiene una nota muy mal escrita dirigida hacias los rippers de sprites, Especificamente los del sitio web de Spriter's Resource, diciendole que esperen un año antes de que publiquen todos los sprites en internet.

Juegos hechos con Game Maker, como "Undertale", almacenan todos sus sprites en grandes spritesheets en formato PNG, en lugar de almacenar cada sprite o personaje como un archivo individual. Así que si alguien fuera a subir todos los sprites sheets así como son... dejaría a todos los sprites con spoilers en el mismo spritesheet.

El nombre del extraño archivo fue elegido para obligarlo a aparecer en la parte superior de la lista de archivos en orden alfabético y hacer su presencia más evidente... lo cual no funciona, ya que la lista de archivos solo es visible si los sprites son separados por nombre usando un programa externo. Ups. Éste fue reemplazado en versiones posteriores.

Version 1.001

¡No me gustan las 'b-bepis'! ¡L-lo juro!

 
¿Sabes lo que yo
    ODIO?

eso es
      'bepis'

EL SABOR
   el olor
      de la textura

hey...
      tu
          babeo...

La Version 1.001 remplaza la solicitud de no-spritesheet con esta vagamente erotica nota sobre "bepis" que es una referencia sobre un personaje de Moonside de EarthBoundque odia a la comida que al jugador le gusta. Toby Fox es un gran fan de EarthBound, y Undertale tiene una muy grande inspiracion del juego. Bepis es una tonta y mala pronunciciacion de pene,de acuerdo segun los desarolladores creen que es algo tonto.

La falta de un significado real para este nuevo texto y el hecho de que reemplaza la solicitud anterior puede tomarse como un permiso para comenzar a publicar spritesheets, como lo admite este documento forlorn-looking email.

Advertencia "¡No spoilear el juego!"

abc_123_a.ogg

Hola. Te-te-te-te-ten algo de respeto y no spoilees el juego. es imposible tener misterios en estos días, por gente entrometida como tú. Por favor mantén esto entre nosotros. Si pones esto en internet, no haré más secretos. Nadie estará impresionado. ¡Será tu culpa! Ja-ja-ja-ja-je-ja-ja-je-ja-ja.

Éste es un archivo de sonido de ocho voces sintetizadas diciendo a la gente que no publiquen los secretos del juego en internet. ¿Quién en su sano juicio haría es—— espera un momento...

El nombre del extraño archivo fue elegido para obligarlo a aparecer en la parte superior de la lista de archivos en orden alfabético y hacer su presencia más evidente. Todos los demás archivos de música y efectos de sonido en formato OGG presentes en la carpeta del juego tienen el prefijo "mus_" o "snd_".

Este archivo fue actualizado en el parche de 1/20/2016. Esta version actualizada casi todo lo que estaba en el audio original.

Mensaje de Toby Fox

Parte del encanto de este juego es el misterio de cuántas opciones o secretos hay. Si estás leyendo esto, no publiques este mensaje o esta información en ningún lugar. O hacer secretos se volverá inútil.
Por cierto, la mayoría de los archivos / texto aparentemente no utilizados se utilizan.
Si puedes encontrar el contexto dentro del juego para un asset, puedes mostrarlo. Pero si no puedes, probablemente significa que no has buscado lo suficiente. Cualquier cosa realmente sin usar probablemente lo publique por mi cuenta, más tarde.
Vivir en un mundo como este, donde las personas simplemente pueden engañar a las respuestas del código ... tu impaciencia REALMENTE te ha dañado, ¿no es así?

This notice is placed at the beginning of the text segment (STRG). It is used in the gml_Script_attention_hackerz_no_2 script, it sets those four strings to the demonx, demony, demonz and demond variables, respectively. (Those names are found between the lines of the message). This script is, obviously, used to warn crackers. It is the first entry in the CODE and SCPT blocks of the data.win file, to increase the chance to be read even further.

In 1.001, however, it has been changed to this:

Greetings.
You have made yourself completely clear.
Understood.
I, your humble servant, will follow you to the utmost...

The variables have been renamed to demona, demonb, demonc and demond, too. Curiously, the first line from the version 1.00 message is still present along with its associated variable, but has been moved to line 2436 (amongst the messages used for special name choices).

Unused Music

mus_kingdescription

A more orchestrated rendition of "Determination", the Game Over theme. Based on the filename, it was most likely used in a scene related to Asgore.

mus_dance_of_dog

This funky fresh beat plays exclusively in the "dancing" dog error room. The error room is most easily accessed by messing with your save file.

mus_sigh_of_dog

This unfunky fresh beat plays exclusively in the sleeping error dog room. The error room is most easily accessed by messing with your save file.

mus_star

Music that uses instruments from Star Fox. Other tracks in the game use instruments from games like Mario Paint, Final Fantasy VI, Chrono Trigger, and EarthBound, so this wouldn't be TOO out of place.

mus_f_part3

Another variation of Flowey's boss music. 0:20 onwards is used for scene transitions (however, a sound effect that sounds like that part plays instead of this track), though the beginning goes unheard in normal gameplay.

mus_f_finale_1

An unused first part of "Finale". This track is never played, as "mus_f_finale_1_l" plays instead. It is simply a shorter version of the first part of Finale, most likely intended for when the player restarts their game after dying in the 2nd part of the Photoshop Flowey boss battle.

mus_piano

Played at the end of the Undertale demo if you kill Toriel in a neutral run, and appears as the last track of the soundtrack (titled "Good Night"), but isn't used in the final game.

mus_ruinspiano

A slow, solemn piano rendition of the music played in the Ruins. Possibly replaced with "An Ending."

mus_menu5

There are seven variations on the Start Menu theme that switch out for each other as you befriend more characters, but only the first through fifth and the seventh are used in-game, leaving this sixth variant unused. Given various pre-release materials, it's likely that the fifth variation was supposed to be used for Mettaton, leaving this one for Alphys... except that even if you spare Mettaton, he runs out of batteries immediately after the fight and spends the rest of the game up to the True Pacifist final boss undergoing repairs in Alphys's lab, so the player (sadly?) has no opportunity to date him.

mus_birdsong's Hidden Loop

mus_birdsong is played when the bird carries you over the gap in Waterfall. However, the music only lasts one loop until it fades out. The file DOES loop properly, however, and a bit of the music at the end is cut off in normal gameplay.

Unused Sounds

mus_sfx_a_swipe

A voice (presumably Mettaton) grunting.

mus_sfx_ahh

Flowey says "ahh".

mus_sfx_voice_triple

Flowey says "triple".

mus_sfx_voice_jafe

Flowey says "jafe".

Activity Level

Wait, we're categorizing this now?

Press Shift or X five times at the title screen to get this handy screen. Activity Level A is shown if you get a neutral ending. Activity Level B is shown if you complete a pacifist route. Activity Level C is shown if you fight Sans twice or kill him. If none of the requirements are met, "No Information" is shown instead.

Unused Battles

RG03 and RG04

In the game's files with battle ID 76, there is a fully complete battle set up for two more Royal Guards, RG03 and RG04. RG03 and RG04 are mentioned by Undyne during a phone conversation as switching off with RG01 and RG02 on certain days. They were likely cut because this real-time daily event didn't work correctly. Their battle revolves around them being old friends who had a falling out, and the Pacifist solution is to get them to make up. The guards themselves are slightly incomplete, both using Aaron's defeated sprite as a placeholder.

Texto sin usar

Alphys's crush

LOOLLLL IF YOU CAME TO THIS PART OF THE CODE TO SEE WHO I HAVE A CRUSH ON YOURE OUT OF LUCK

The script for Mettaton's quiz contains a comment, ostensibly meant to be an in-character quote from Alphys. Specifically, it's placed right after when Mettaton mentions that Alphys names programming variables after her crush, and thus appears to be a bit of an in-joke to people reading the game script.

Annoying Dog

The Annoying Dog item has battle abbreviations for normal ("Annoy Dog") and serious ("Dog") mode programmed. However, the Annoying Dog can't be put in a Dimensional Box and will disappear if the player leaves the room it is found in, so it can never be brought into battle. As such, these strings can't be seen without editing the game.

Mensajes de error

Error de Snowed Inn

Error.

A generic error message, found among the strings for Snowdin's Snowed Inn.


Undyne chase error

* A rousing error.
* (Error.)

Among the strings used when Undyne collapses from heat exhaustion are these two error messages that appear to serve the same purpose.


HER OPINION OF YOU IS VERY... ERROR-Y.

ERROR!!!
SEE YOU LATER!

Among the strings used when Papyrus calls you about your clothing and Undyne's murderous intentions towards you is this error.


Un viaje a errorland

* Where will we go today?

         Error       Error

A developer's hell.

This is among the River Person's lines.


Alphys shipping error

* Error...

A generic error message located directly after Alphys asks the player if they think Toriel and Asgore will get back together. Guess not.


You've elected me in error

WOWi, Nice error.

Right after you're asked to be the ambassador to the humans is this error.


Error de sabor

* It is ERROR MESSAGE!
  Yes         No      

If you reset your game, Toriel will guess your favorite pie flavor from the choice you made pre-reset. If this went wrong, this would probably be displayed.


ACT menu error

    * Error

At the very end of the ACT menu strings is this yet again generic error message.


Item menu error

* If you are reading this,&  I messed up somehow./%

The message that shows if you try to get info for a slot that's empty in your inventory.


Item description error

* Error!

This same generic message appears again at the end of the strings listing the item descriptions.


Papyrus call error

ERROR????

Among Papyrus's lines for when he talks about the spaghetti trap room with what he says depending upon if you say you ate it or left it is this error. This probably would have appeared if your choice could not be determined by the game.


Undyne call error

* Error?

Among Undyne's lines for when she talks about Monster Kid depending on whether you saved him, ran away and had Undyne save him, or otherwise ran away is this error. This probably would have appeared if your choice could not be determined by the game.

Ending call error

 [look left]  * i'll be honest.
  [winking]   * i have no idea what
                happened for you
                to get here.
 [look left]  * this is actually some
                sort of error-
                handling message.
[eyes closed] * so, if you're getting
                this ending...
 [look left]  * tell whoever made the
                game, okay?
  [winking]   * they'll fix it, or
                if it's a novel
                situation...
 [look left]  * they might even add
                another ending to
                the game.
[eyes closed] * chances are, though...
  [no eyes]   * you're just a dirty
                hacker, aren't you?
 [look left]  * yeah, get outta here.

Dialogue spoken by the character Sans for an ending meant to function as an error handler if none of the qualifications for any other endings are met, which cannot be triggered during normal gameplay. The actual script data contains control codes to change Sans's expression, represented here by bracketed text.

The music track "Dogsong" is played while Sans is speaking.


(Source: YouTube: Undertale "dirty hacker" ending)


Error de Gyftrot

Error!!

This generic error that you've seen a million times appears again among Gyftrot's strings.

This cactus is UNDER CONSTRUCTION
This article is a work in progress.
...Well, all the articles here are, in a way. But this one moreso, and the article may contain incomplete information and editor's notes.
Notes: I got lazy after this, I'll describe the errors better later, and probably put all of these unused strings into subpages when I can.


Aaron error ;)

Flagrant 
error
; )


Mettaton quiz show error

ERROR?


8-legged error, ahuhuhu~

... that this is&an error message!?

Finally, a slightly interesting error message!

This appears after Muffet receives a telegram from the other spiders that changes depending on your spending choices.


Papyrus fight error

THIS IS AN ERROR
MESSAGE.
REALLY!!!


Flowey's Error

* Error

Flowey will display this message and soft-lock the game if you manage to get in his room before fighting Toriel.

Papyrus's puzzle error

Error, Pepibs.


Grievous error

* grievous error

Placed among the strings for the annoying dog absorbing the artifact and Sans's asking to hang out.


Mettaton fight error

* Error Baby


That error's a bomb!

* Error.
* Error,

These two generic errors are among the lines for the bomb-defusing minigame.


Burgerpants error

* I'm a goofy goober Yeah 
  this errorr. message.

The strangest error message so far is among Burgerpants's lines. It appears to be a reference to the 2004 film The SpongeBob SquarePants Movie.


Newspaper writer error

* Beautiful.
* An error message.


True Lab error

 error


Papyrus's toolshed

WHAT!?
THAT'S IMPOSSIBLE.

If you get into Papyrus's toolshed by manipulating save data, reading the note will result in this message.


Legendary Artifact

* (This will never happen.)

Normally, attempting to obtain the Legendary Artifact will cause a dog to appear in your inventory, which will then steal the Artifact when used or dropped. However, if you remove the dog from your inventory via debug mode or other means and interact with the Artifact again, you'll get the placeholder dialogue above.

Inaccessible Echo Flowers

* Error!

Interacting with any of the numerous inaccessible Echo Flowers in Waterfall will give this generic error message.

Unused pre-battle message

You shouldn't read this.

The battle encounter that involves Aaron and Woshua being freaked out by Napstablook's music is not supposed to show a "pre-battle" message.

Satisfacción

Undertale-satisfiedex.png
Monster seems satisfied.

Unknown. Will appear by pressing O + P in debug mode while fighting Mettaton EX, then sparing him.

Quiche Guilt

* Somewhere^1, a quiche's worst&  fear becomes reality./%%
* A quiche in another timeline./%%

Part of an unused set of scripts named "quicheguilt" that involves you standing still in the quiche room.

Horse Stable

Among the lines for the garbage dump and Napstablook's house, there are a few lines implying there was a horse stable somewhere in Waterfall.

* (It's a horse stable.)/
* (Do you want to go&  inside?)&         Yes         No \C
* (You jostle the door.)&* (It's locked.)/
* (Suddenly^1, from inside&  the [redacted], you hear a&/%%

Interestingly, we're hearing a noise from inside what is supposedly the horse stable, but for some reason, whatever it was is replaced with "[redacted]", and whatever it is that we hear at the end is just outright removed.

This dialogue seems to be triggered by a trash can in Napstablook's courtyard. Inspecting it if flag 92 (yet again unused) is less than 3 will cause the same figure from room 272 to appear inside the "stable", and say

* x/%%

in Wingdings.

Monster History Part 6

Unused monster history text that is the only outright confirmation of what "fallen down" monsters as discussed in Alphys's journals are.

(It's a book labelled Monster History Part 6.) Read it Do not
Unfortunately, monsters are not experienced with illness.
However, when monsters are about to expire of age, they lie down, immobile.
We call this state "Fallen Down."
A person who has Fallen Down will soon perish.

Mortal Enemy request

As this comes right after Napstablook's friend request in Hotland, it may have happened as a result of rejecting the request. In the final game, the friend request rejects itself regardless of your choice.

METTATON has sent you a Mortal Enemy request.
Congratulations! You are now Mortal Enemies with Mettaton.
COOLSKELETON95 has posted a comment on this change.
CONGRATULATIONS, YOU TWO! WISH YOU A LONG AND HORRIBLE RIVALRY.
You rejected the request.
METTATON has sent you an invitation to "Die."
RSVP? Respond Ignore

Bepis valley Granola Bars

Bepis valley Granola Bars

Found along the lines of the unused "Mortal Enemy request" text. Its purpose is unknown, but it could just be a humorous parody of Nature Valley brand granola bars.

Art Club Room

This message is shown if you read the sign in the art club room in Hotland (where the secret boss So Sorry can be found) on a genocide route. However, the entire second floor of Hotland is blocked off by a force field on a genocide route, making this impossible to see normally.

(Art club is cancelled!)

Slow-dance with Mettaton

Among the lines for Undertale the Musical are these lines, possibly indicating you were originally meant to dance with Mettaton:

(Hmmm? Getting creative?)
(Dance with me, darling.)
(Oh! The audience can feel#your passion!)
(Show the audience#your passion!)
(So close... How passionate...)
(... do you need some help?)
(... what ARE you doing?)
(Don't stop now!)
(Look at you, leaping around#the stage...)
(Can't keep your hands off, huh?)
(Is that how humans dance?)
(Humans are stranger#than I thought.)
(Oh! They're really#getting into it.)
(Moving so far...)
(Who can blame you?)
(Hmmm, I'll have to get used#to it...)
(Even better than#I thought...)
(So that's wha #it's like.)
(Dancing with... A human.)
(What a shame...)

TestMonster

"obj_testmonster" is an enemy called "TestMonster", an early version of Froggit which, despite appearing to be a simple dummied-out enemy, is actually a cleverly-hidden event trigger that, if encountered in Sans's room after befriending Muffet on your 255th playthrough or later, proves key to reviving Gaster and saving Asriel. Just kidding, it was used for testing.

It shares many of its battle dialogues with Froggit, but it has a number of extra lines buried in its code.

* You feel intimidated by the&strength of this adversary.^4 &* Just kidding.
* The enemy cooks a small&bowl of flies.
* You can't concentrate&over the sound of croaking.
* The battlefield is filled with the smell of mustard seed.
* You think hard about words&that rhyme with frog.^4 &* Log.^4 Dog.^4 Snog.^4 Pog?
* A frog can't lick its&wounds because its tongue is&just too stretchy.
* You say some raunchy&things to those frogs.&Jeeeez!/
* There's definitely some&sort of reaction./^
* What's your favorite color?& &    * Red           * Orange"
* Do robots dream of&electric sex?/^
* I hate programming this./^

Flowey's big boner

* Big boner down the lane^8 %%
* Big boner down the lane^4 %%

These two strings are located among the dialogue for the Photoshop Flowey boss fight and the hacked "Floweytale" intro sequence. It's unsure what they could have been used for, but they likely were never meant to be seen by the player.

True Lab Entry Number 17

ENTRY NUMBER 17
monsters' physical forms can't handle "determination" like humans' can.
with too much determination, our bodies begin to break down.
everyone's melted together...

Alphys' entry number 17 is skipped in the True Lab, but is found in the code. Alphys instead explains this at the end of the area. W.D. Gaster has his own entry 17, which can be seen in room_gaster.

Placeholder Screens

Two screens featuring the annoying dog are present in the game. These are used as "error handlers" in case something goes wrong, such as loading a corrupted save file or entering an invalid or otherwise inaccessible room.

The song "mus_dance_of_dog" is used on one of the error handler screens (the left one), at a random pitch. The other song is "mus_sigh_of_dog".

Unused Items

ID Name Short Name Serious Name Description Use Text
2 Croquet Roll CroqtRoll CroqtRoll Heals 15 HP

Fried dough traditionally served with a mallet.

You hit the Croquet Roll into your mouth.
5 Rock Candy RockCandy RockCandy Heals 1 HP

Here is a recipe to make this at home:

1. Find a rock

You ate the Rock Candy.
6 Pumpkin Rings PunkRings PmknRings Heals 8 HP

A small pumpkin cooked like onion rings.

You ate the Pumpkin Rings.
8 Stoic Onion StocOnion Onion Heals 5 HP

Even eating it raw, the tears just won't come.

You ate the Stoic Onion. You didn't cry...
9 Ghost Fruit GhostFrut GhstFruit Heals 16 HP

If eaten, it will never pass to the other side.

You ate the Ghost Fruit.
18 Puppydough Icecream PDIceCram Ice Cream "Puppydough Icecream"

Heals 28 HP. Made by young pups.

Note: This item's name is too long to show up properly when using a dimensional box.

Mmm! Tastes like puppies.


(Fuente: rawr.ws)

Oddities

Annoying Dog's Sale Price

The Annoying Dog can be sold for 999G and haggled up to 1251G (the highest sale price of any item in the game!), but as mentioned above, it will disappear if taken out of the room it spawns in, so this can never be seen on a normal playthrough.

Developer Oversights

Mettaton EX Battle Essay

Mettaton EX has an "essay" question where you can type in text and have him comment on it. Unfortunately, typing "x" or "z" ends the essay unless CTRL is held down, leaving some words (in most playthroughs) untypable. In the PlayStation 4 and PlayStation Vita versions of the game this oversight was corrected.

The following words can't be triggered:

  • sexy
  • foxy
  • tantaliz (covers both "tantalizing" and "tantalize")

Mettaton's House

Mettaton's bed, upper walls, and TV have collision, but it's impossible to get in that section of the room.

Naming the fallen Human

In the PlayStation 4 and PlayStation Vita versions of the game, entering in the name gaster will result in a crash, rather than the intended reset.

(Source: Twitter)

Version Differences

Windows OS X and Linux
Undertale-LabWindows.png Undertale-LabOSX.png

In the Windows version, the monitor in Alphys's lab follows your movements. However, this is only a static image in the OS X version. The static image for the monitor is still in the Windows version's files, unused.

'spr_labcamera_emergency_0'

Undertale Lab monitor sprite rip 1.png

'spr_labcamera_emergency_1'

Undertale Lab monitor sprite rip 2.png

1.001 patch

Hmmm...
To do:
Hastily pulled from the Undertale wiki. Add anything that's somehow not on that page, and add detail to this stuff.
  • The loading splash screen from the demo was restored.
  • The Joystick Config menu was graphically updated.
  • A kill sprite was added for "Ice", which is encountered by stealing Ice Cap's hat. Previously, it mistakenly used a placeholder sprite of Aaron.
v1.0 v1.001
UNDERTALE-BlueAttack-Old.png UNDERTALE-BlueAttack-New.png
  • The color of blue attacks was adjusted somewhat, as the original, cyanish hue made it hard for red-green colorblind players to distinguish these attacks from white ones.
  • Some dialogue was updated to account for aborted genocide runs, such as the phone call in the invisible maze room, Papyrus's bone box during his date/hangout, and possibly more.
v1.0 v1.001
UNDERTALE-UndyneCutscene-Old.png UNDERTALE-UndyneCutscene-New.png
  • An oversight that would cause Papyrus to appear during the cutscene where Undyne first appears, even on routes where he was killed, was fixed.


UNDERTALE-PuzzleSolution.png
  • A visual solution was added to the piano puzzle for the benefit of hearing-impaired, tone-deaf, or just plain uncertain players.
  • Dialogue relating to the "Clam Girl" NPC in Waterfall was changed and added.
  • The grandpasemi.ogg sound effect was renamed to grandpatemi and repurposed for Temmie, if you refuse to give her Tem Flakes.
  • Various layout changes were made to attempt breaking the "Lab Skip" glitch. This didn't quite work.
v1.0 v1.001
UNDERTALE-AlphysLabBathroomSign-Old.png UNDERTALE-AlphysLabBathroomSign-New.png
  • The bathroom sign in Alphys' Lab was moved from the right side of the door to the left side in order to patch the bug described above.
  • New dialogue was added for Burgerpants involving the Nice Cream Man.
  • The advancement of Sans's pre-fight text was altered slightly. He now says the short version after you survive the opening attack three times, rather than after he is defeated once and the player reloads to fight him again.
(Upon closer examination, the holes in the fabric seem to be growing.)
(Might take a while for the dog to fix all of them.)
(Dogs aren't usually very good at knitting.)
(A crocheting dog is out of the question.)
  • Dialogue was added to the secret Annoying Dog room, elaborating further on the "patch" that is supposedly needed before the Dog can be fought.
  • As detailed above, the "don't spoil the game, dataminers" warnings were changed due to no longer being necessary.
  • The Gaster-related "fun" setting now works without having to manually edit the .ini file first.
  • The Check option in battle no longer shows the actual stats used by the game code, instead displaying arbitrary numbers or silly messages.
  • The original version of the game had a major oversight that would allow the player to achieve a True Pacifist ending while having a non-zero amount of EXP (by reloading after a Neutral route in which no monsters were slain, killing some monsters in the Core, and then going to pick up Undyne's letter).
  • The unusually large space between Asgore and Monster Kid on the final version of the menu screen was shortened.
  • A (presumably) debug feature that would cause Undyne and Alphys's kissing animation in the cutscene leading up to the Asriel fight to start early by pressing the space bar was removed.
  • Various graphical glitches and typos were fixed.

A "1.001v1" patch was later released. This is a Steam compatibility update. Only one thing has changed; entering "Gaster" as the fallen human's name will reset the game, just after typing it. In the previous version, it only does so if you confirm the name.

Linux patch

The Linux version of the game is identical to 1.001, but includes a bugfix where pressing Z while pressing Enter would not register the Z input.

PlayStation 4 and PlayStation Vita

Full-Screen Froggit

In the Ruins, the Froggit that mentioned pressing "F4" to enter full-screen was replaced by a Froggit that mentions that the border can be changed in the settings menu on the main menu.

Tiny Ruins Froggit

PC Console
* (There's an ant-sized frog in a crack in the wall...)
* (It waves at you.)
* (There's a small crack in the wall here.)
* (There's a frog inside...)
* (Wait! There are two!)
* (You had a wonderful, exclusive experience...)
* (... that only someone who saw two frogs could feel.)

As a result of removing the mention of "four frogs in this room" by the previous Froggit, this dialogue was changed.

Menus

The ITEMS option appears grayed out on the menu if you do not have any items.

Dog Shrine

Hmmm...
To do:
Images that aren't from video footage, and music rips.

A location, likely parodying the Kickstarter campaign, was added under Papyrus's sink. You can donate gold to it to have it decorated with various items. The price gradually increases every time you donate, however. Each time you donate, you get a PlayStation Trophy. This area has two new music tracks, the second being unlocked after donating six times. It uses instruments from Super Mario World.

If Papyrus isn't befriended, the donation box will appear in the trash area of Waterfall, however donating here will only give you the trophies.


Sans

Your HP is displayed in pink the entire fight, regardless of whether or not you are taking KARMA damage.