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*=-=-=-=-=S A N 'S U N D E R T A L E=-=--=-*
*-=-=-=-=-=-=-=SECRETS FAQ v0.05-=-=-=-=-=-=*
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wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
This guide tells you SOME of the secret stuff in the RPG, Undertale. This guide
is intended to be a compilation of various secrets and differences between
genocide vs pacisfist vs true pacifist runs. Do not read this guide if you don't
want to read spoilers.
Consider voting for Bernie Sanders in 2016. He will truly Make America Great
Again. Any other candidate is objectively the Wrong Choice. But if you're
playing Undertale, chances are you're already Feeling the Bern :)
Feel free to reproduce this guide in any form, in part or in whole. By all means
use it, dissect it, copy it, distribute it any way you want, information should
be shared :) Don't feel the need to cite authorship of anything in this guide.
Stuff that is planed for future versions is:
-further fill out sections 3, 4 + 6
-fix formatting from some of the game quotes (most quotes are extracted from
raw game data and don't look pretty at first, sorry ):
By the way, a (presumed?) complete text dump of the game can be found here:
http://www.multiupfile.com/f/e42c839c
or on pastebin:
http://pastebin.com/vHrHFktq
and
http://pastebin.com/b6QJm8v4
(split into two files on pastebin). Sorry for the horrible formatting, haven't
had time to properly parse it. A lot of fun hidden stuff in here that isn't
worth mentioning in this guide by its own. I recommend reading the file in
Notepad (with "Word Wrap" enabled), as opposed to Write/Word. The pastebin file
is even worse formatted than the text file, so I wouldn't recommend using that.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Contents:
---------
1) The Ruins
2) Snowdin
3) Waterfall
4) Hotland
5) Genocide Run vs Pacisfist vs True Pacifist differences
6) Miscellaneous
7) Gaster + Room glitching
--------------------------------------------------------------------------------
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*The Ruins*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. *Naming your character after prominent NPC's gives you different dialog
options, and won't let your select these names:
Sans "nope"
Toriel "I think you should chose your own name my child"
Asriel "..."
Asgore "You cannot"
Flowey "I already CHOSE that name"
Undyne "Get your OWN name!"
Alphys "D-don't do that"
Gaster .... reloads intro sequence before you can select
2. *Certain names unlock additional dialog, and let you name them this way:
Catty "Bratty! Bratty! That's MY name!"
Bratty "Like, OK I guess"
Temmie "hOI!"
Chara "The true name"
Murder "That's a little on- the-nose, isn't it...?"
Mercy "That's a little on- the-nose, isn't it...?"
3. *Naming yourself "Frisk" unlocks Hard Mode. Hard mode starts in the ruins,
and replaces normal enenimes with much harder, late-game enimes, that on LVL1
do 5 damage each (meaning you die in 4 hits). Hard Mode ends at the end of the
ruins in a humerous sequence, where it is implied the dog was the one that ate
Toriel's pie
Dialog option: Frisk "Warning: this name will make your life hell. Proceed
anyway?"
A few more names can be found in the text dump (see the introduction to this
guide).
4. In Hard Mode, Toriel will mess up her pie and bake you a "snail pie" instead.
It only heals 4 health.
5. In the frog room, one of the frogs mentions there being four frogs in the
room. Three are obviously visible, and the fourth is on a crack in the wall
if inspected
6. Talking to one of the frogs gives you the option of getting rid of yellow
font "spare" option for the rest of the game. Talking to him again gives you the
option of turning this font pink. Later, in the garbage dump, you can find
discarded yellow dialog options.
7. Saving the pie Toriel bakes you until the very final fight against Asgore,
and eating it in front of him during the fight, will weaken his attacks and
defense, making the fight easier.
8. You have several different options when confronting the very first enemy in
the game, the dummy. You can try Toriel's suggestion of talking to it, you can
repeatedly "spare it", you can fight (kill it) and be scolded by Toriel, or you
can repeatedly (about 10 times) "miss" the fight bar when attacking, until the
dummy "tires of your aimless shennanigans" and leaves the battle. If you talk to
Toriel before the fight, she will suggest different dialog options (non of which
affect the fight).
9. If you wait about 10 minutes in the room Toriel leaves you in, she will call
you several times, first apologizing for how long it is taking her, and by the
third call her phone is stolen by the dog. If you call her phone after this, you
will hear "*heavy panting*" as the dog breathes into the phone.
10. If you're fast enough to pull the "wrong level" in the ruins (before Toriel
finishes walking), she will comment to the effect of being surprised at how
quick you are to be wrong.
11. (Unconfirmed) After the fight with Toriel (and sparing her), go all the way
back to the first screen in the game where you fell on the bed of flowers, you
will find Toriel tending them.
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*Snowdin*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. You cannot actually "lose" the fight to Papyrus. If you get too low on
health, he "captures" you and puts you in the locked shed (along with dog food
and a bowl of water), telling you to wait for Undyne to show up. You can easily
escape. To my knowledge, there is no other way to unlock the shed unless you are
captured. If you "lose" (get captured) by Papyrus twice more, you can forgo the
battle altogether.
2. At the end of the game in the "Final Hallway", you have a final conversation
with Sans regarding your "sins" throughout the game, based off of how many
enemies you have killed. Finish this conversation, don't save, and reload at
the last save point. At the end of his speech he will whisper to you a "secret
code word" that only a time traveler would know. Reload again for a double
secret code word. If you reload for the third time, he will give you the key to
his room in Snowdin.
3. Likewise you can get a key to a secret room behind Sans/Papyrus' house.
Inside is a timemachine-like device, as well as several coded messages you are
unable to read (presumed to be in Wing-Ding fonts).
4. There's several ways to complete all of Papyrus' puzzles. For example, the
sliding switch puzzle (that Papyrus says looks like his face), if you badger
him enough he will reveal there is a switch hidden in the pine tree that allows
you to bypass it without solving it. Similarly, on the coloured-tile puzzle,
saying you don't understand the rules several times in a row causes the machine
to break, so you don't have to "complete" it. If you try exiting any of the
screens where Papyrus is present on a puzzle, he will comment along the lines of
that he made the puzzle too hard or that the human is escaping.
5. If you complete the pascificst / neutral / true pascifist endings (haven't
tried this after genocide), upon leaving the ruins and meeting Sans for the
first time you'll turn around and shake his hand before he prompts, to his
amazement. You can also trigger this dialog on your first run by doing the
normal handshake, quitting and reloading a save before the handshake, so your
character "knows what is coming".
6. Upon exiting the ruins, if you examine the nearby rock there is a hidden
camera (presumably, Alphys). On that note there is a hidden camera in every area
The tree behind Papyrus' "sentry station". The lump of snow to the left of the
"snowdecahedron". The tree next to the 'dog marriage' sign. The tree behind the
sentry station near the dog sculptor. At the end of the long bridge.
7. At one point while you're in Snowdin, Sans offer to sell you some fried snow
for an exorbatant fee, more money than there is in the game. If you cheat and
edit your game save so you actually have this amount he'll still refuse, saying
the snow is too valuable to sell.
8. All dog enemies can be befriended in one turn by using the stick weapon
(the weapon you start out with) in battle, prompting a game of fetch.
9. Lesser dog can be befriended after a few pets in battle, however he can
continued to be pet many times, causing his head to grow in lenght by a small
amount each time. Eventually he will grow so tall you will be unable to pet him
anymore. A few screens later the snowmen the dog creates reflect this, all
having very tall necks in their snow sculptures.
10. You get a different type of snow sculpture on your head everytime you slide
through the puzzle area.
11. At the Inn, if you rent a room then quickly talk to the innkeeper, she will
tell you off for requesting a second key.
12. Heading north in Snowdin, past the Wolf throwing Ice in the Lake and the
Rocks it is possible to trigger the Wrong Number Song, if you haven't fought
Papyrus yet. You can also get a Fridge Call earlier on with Sans and Papyrus
talking about the rock, but this is not present in all playthroughs (seems to
be random).
13. There's hidden money in: a. Sans/Papyrus' house in the couch b. if you
inspect every snow boulder in the greater dog area (30G).
14. The optional Golf Course minigame can be completed 6 different ways and
will comment on how you completed it (doing it fast, being accurate, waiting
until the ball is very tiny, taking a while, skidding on the ice, etc.) Each
of the descriptions relate to the 6 human souls.
15. When Papyrus invites you into his house, if you walk into the kitchen he’ll
run over to you, and if you leave the kitchen, he runs back to where he was. If
you keep walking into and out of the kitchen quickly he starts running faster
and faster until he gets to where he was walking, so it’s kind of a game to see
how many times you can switch his direction before he gets to the end of the
room. There’s a ding sound each time he switches directions.
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*waterfall*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. (During non-genocide runs) you can goof off in the Undyne fight and anger
her. Purposely miss every arrow she sends towards you, healing if necessary.
Eventually she will become so angered she will initiate a super-attack that is
very hard to surivive, even harder than genocide-level attacks.
2. You can fight a hidden boss in the locked cave room by waiting around long
enough, called "Glyde", but you can only face them before fighting Papyrus.
Gets you 120G for sparing it.
3. The only way to unlock the hidden cave room is by avoiding ALL credits
during the end-sequence, giving you a short humerous sequence.
4. It is implied that the dog stole Toriel's phone, as if you complete the music
box puzzle and call her phone in that room, it will ring from your backpack.
5. The mad-dummy's rant towards you will change, depending on what you did to
the dummy in the beggining of the game. For example if you run away from that
dummy then ignore the mad-dummy, he will say that is just like you.
6. In the room with the 4 bridge seeds, you can make a bridge to the sign, which
tells you that you've failed the puzzle. More interestingly, you can make a
bridge to the bottom right accross the river to a secret room.
7. If you want to Yellow name Aaron in the credits, go to Napstablook's house
and play music. Head out and to the left.
8. To win snail races, tap the Z-key, wait for the exclaimation point to go
away, and then repeat 7-8 times. You want a very close 2nd place to get 30G.
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*hotland*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. During the spider fight, if you eat a donut/cider purchased from the bakesale
from the beggining of the game in the ruins in front of the boss, she'll
instantly receive a telegram ending the fight in one turn
2. Similarly, if you equip fashion items (eyeglasses, apron, etc.) during the
final fight with Mettaton you get big boosts in ratings, ending the fight
earlier. Several food items have this effect too.
3. If you die during the Mettaton fight, the game allows you to skip the intro
by flipping its switch. On a meta level, if you play through the game more than
once, you can instantly flip his switch despite not hearing the intro speech
during that playthrough.
4. Despite what it might seem at first, it is actually impossible to die during
any of Mettaton's game-shows, they are always rigged in your favour no matter
how much you goof off. If you fail the substitute cooking show, it will just
cut to commercial break, for example.
5. It is possible to eventually drain the water-cooler if you keep taking water
from it. At the end of the game a tree will be growing from this spoit (I am
unsure if this is applicable to all endings or not).
If you refuse to give water to Undyne, she'll return to her house with heat
stroke, meaning you can't befriend her / do cooking classes. You can also empty
the water out in front of her prompting the game to call you sadistic.
6. You can buy hot-dogs from Sans even if your inventory is full. He will put
them on your head. After 30 balanced on your head he will cut you off.
7. You can "fight" a secret boss, the furry character referred to as So Sorry,
by walking onto a hidden path (insert video)
8. Typing certain negative adjectives / swear words (such as "stupid") during
the essay portion of the Mettaton fight ends the segment early with his response
"Hey, this essay is supposed to be about me, not you"
a full list of everything you can do can be found at this webpage:
http://undertale.rawr.ws/gml_Object_obj_essaystuff_Draw_0.txt
9. The best (fastest) way I've discovered to farm money is by sparing enemies in
the area before you fight Mettaton Ex for the last time. You get 70-150 gold per
fight, and if spared there is an infinite amount. Another way accessible earlier
in the game is by buying cloudy glasses for 30g from Gerson the turtle
shopkeeper in waterfall and selling them in Temmie village for 50g each.
10. If you memorize the rules from much earlier in the game, you can actually
complete the extended maze during the Mettaton GameShow. Difficult to do, but
gives a few extra dialog options.
Or you can follow this. Dashes mean wait for the purple tiles:
urr-drrdrrr--ru-rrddrrur-urd-rru-rd-rrruu-d-drr-u-r--urrrdddrruuurrdddrr
(see the image of solution below if unclear):
http://imgur.com/abW77N0
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*Genocide Run vs Pacisfist vs True Pacifist differences*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. On the Genocide run, walking into the kitchen gives you the dialog "where
are the knives?" (
http://imgur.com/pzCoFwS )
2. All pronouns in the genocide run are in the first person: looking into the
mirror gives "Its me, PlayerName", for example, instead of "It's you!"
3. Sans left eye is the one that goes crazy colors when he uses his opening
attack or teleports the heart back the the center of the box. During the battle,
he frequently closes his right eye. However, in non-genocide runs and earlier
parts of the game, he closes his left eye.
Basically: Once he's determined to stop you, he keeps the more dangerous eye
trained on you. When he believes you could be/are a friend, he frequently closes
the eye he could kill you with.
4. The neutral endings are all different, depending on what combination of
bosses you kill (Such as kill everyone but Mettaton vs. everyone but Papyrus).
A compilation of all known endings can be found here:
https://www.reddit.com/r/Undertale/comments/3mq3bg/spoilers_how_about_a_compilat
ion_of_all_of_the/
And a video of most of the above can be found here:
https://www.youtube.com/watch?v=xCm-D26sE8s
Bonus secret ending with Sans:
"i'll be honest.
;
i have no idea what& happened for you to get here. this is
actually some& sort of error- handling message. so, if you're getting this
ending... tell whoever made the game, okay?;
they'll fix it, or if it's a
novel situation... they might even add another ending to& the game. chances
are, though... you're just a dirty hacker, aren't you? yeah, get outta here."
5. On the genocide run you can keep taking pieces of snow from the snowman until
he is no more. He will beg you to stop.
On the perfect pascifist ending, you can still have the snowman call you a bad
person:
Ah, the barrier's open...?
You know I cannot move. Why are you telling me? To
mock me?/ Everyone may think you are a good person, but this snowman knows the
truth./ Someday, your friends will realize your heart is as cold as my butt.
6. If you never remove the intial bandage until the end of the game in the
neutral run, you get an additional line of dialog from Sans:
"did you ever got rid of that gross bandage you were wearing?"
7. Common knowledge, but sparing Sans in a genocide run causes him to hug you
with an unblockable instant death attack, where he tells you "not to come back"
(as in, to never reload your save).
Upon reloading:
woah^1, you look&REALLY pissed off.../
\E4heheheh.../
\E5did i getcha?/
&
\E4well
^1, if you came&back anyway.../
;
\E1i guess that means&we never really&WERE
friends^1, huh?/
\E4heh./
1
\E9don't tell that&to the other&sans-es^1, ok?
8. If you kill all the dogs but doggo, he will think all his dead friends are
playing a prank on him :(
https://www.reddit.com/r/Undertale/comments/3nnevf/not_sure_if_it_is_fake_but_
looks_like_that_this/
9. More endings where you harass / troll Flowey (sorry for the bad formatting):
So you went the whole way through&without killing... And then you
decided to kill ASGORE? What the hell is WRONG with you? You
COMPLETELY missed the point. Are you trolling me? Because. You are
only trolling yourself. What a waste of everybody's time. All you had
to do was make friends. withh Papyrus, Undyne, and then Alphys. But you
were too busy messing it up!
Hey.
Since you defeated me.
I've been thinking.
/
'
\E3Is killing things&really necessary?/
\E1I.../
"
\E3I honestly don't&know
anymore./
\E0I have a request&for you./
\E4Prove to me.../
1
\E5Prove to me you&are
strong enough&to survive./
\E6Get here from&the beginning./
%
\E0Without killing
a&single thing.../
"
\E4... and I won't&kill the king./
\E4... and^1, maybe.../
3
\E
Then you'll have&your so-called&"happy ending."/
\E6So^1, what will&it be?/
5Will you prove&yourself?/
)
\E8Or will I get to&watch you suffer...?/
Either
way^1, I'm&interested!!!/
\E4Hee hee hee.../%%
Interesting.../
)
\E6So^1, even
with&everything you did.../
!
\E5The outcome's still&the same./
0
\E9In the end^
your&choices were an&illusion./
"
\E9NOTHING you do&really matters!/
\E8Hee
hee hee!/
\E8.../
\E0Well./
\E6You DID do what&I told you./
9
\E5I guess
it's up&to me to get you a&REAL happy ending./
0
\E0For starters^1, you&can't
do it by&yourself./
-
Papyrus^1, Undyne^1,&Alphys..^1. these guys./
)
\E4Are you
friends with&all of them yet?/
7
\E5Maybe you should go&back and..^1. "hang"&with
them./
\E4The power of&friendship.../
&
That always saves&the day^1, right?/%%
-
\
So^1, killing people&is ACTUALLY fine...?/
\E4Sure./
I'm glad we agree on&the
value of a life./
I've learned SO&MUCH from you./
?
\E0Though..^1. are you&REALLY
gonna keep&doing things halfway?/
&
\E8The amount of people&you killed.../
\E9It's
honestly&DISAPPOINTING./
\E8You IDIOT./
)
\E4You really can't do&ANYTHING right./%%
Why^1,
..?/
\E3Why?/
\E1WHY?/
)
\E8We were on our way&to REAL victory.../
\E9On our
way to making&up for LAST time!/
"
\E2Why'd you have to&SCREW IT UP?/
\E5Hahaha.../
\E9Is this REVENGE?/
<
\E1Making me watch you&act so pure and&happy^1,
while I...?/
9
\E1Making me watch you&live out your life^1,&while I...?/
\E1.../
\E
7No./
\E8NO./
I KNOW what you're&doing./
)
You just want to see&what it's all like./
"
Before we TEAR IT&AWAY from them./
Ahahaha.../
\E9Genius^1,
%
\E4Well^1, I'll let you&mess around./
'
\E8I know you'll come&back
eventually./
\E9And when that time&comes.../
\E4
\E4I'll be waiting&for you./%%
"
Why
do you keep&coming back here?/
5
\E5Oh^1, I get it^1.&You wanna be friends^1,&huh..
?/
\E8You're PATHETIC./
3
\E8You REALLY think I&want to be friends&with YOU?/
\E5
Heh.../
&
\E9You really DON'T&get it^1, do you?/
7
\E5There's only one&person I could
care&about anymore./
6
\E6And even then^1, I&couldn't TRULY care&about them./
5
\E5I
just like to think&there's someone out&there.../
#
Someone that I&won't get tired
of./
\E8Someone like ME./
3
\E4Quit looking at me&with that stupid&expression./
You're pissing me&off./%%
\E0So you're here&again./
\E2What's wrong with&you?/
0
\E4
Are you trying to&start the Flowey&Fan Club?/
'
\E5Because if you&want to join
THAT.../
#
\E4You'll have to&talk to Papyrus./
\E6Yeah^1, he started&one./
$
\E5A few
different×^1, anyway./
\E0I won't lie./
:
\E4He's one of the&better characters&
to mess around with./
1
\E5Took me a long&time to get bored&of that one./
In this one (trolling flowey after killing Asgore), he complains about Sans
being
way OP and able ot kill Flowey if he trys to start something.
.. Yeah. Talk to him about it. So.Did you start the Flowey Fan
Club? Ha. I'm just kidding. I was watching. I know you didn't.But
I don't care. Really. He probably would have invited his garbage brother.
You know .Smiley Trashbag. Say.If I have ONE piece of advice for you...
DON'T.
Let his brother.
Find out ANYTHING about you. He'll... well...
Let's just say.He's caused me more than my fair share of resets. Stay
away from that guy. Why do you keep coming back here?
You don't REALLY want
to be friends, do you...? No. I get it.
You're just like me, aren't
you?
You don't care about anyone. You're just bored.
You just want to see
what I'll say. So you can laugh and throw me away like a broken toy.
Well, TOO BAD! I'm not LIKE everybody else. So, from now on...
You're not getting ANYTHING. Don't you have anything BETTER to do
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*Misc.*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. Dog Residues can be used over and over to fill your inventory (and Dog
Salads) and sold at Tem Village to farm G. You'd use it there for the 1000g for
the Tem's education so you can get the option for the Tem armor early, then have
it open if any bosses give you trouble.
2. This is rather common knowledge so I almost didn't put it in, but once you
first get Papryus' phone number, call him in every room to hear his commentary!
You can even go back to rooms from the earlier puzzle areas. Once/if you
befriend Undyne, you can recall them for almost every room and get more
commentary
3. On this note, before you go to the end credits and finish the game, try
talking to NPCs throughout the game to see how your actions have impacted them.
For example, if you go back to the start of the game, you can see Flowey/Asriel
4. The mystery key you can purhcase is for the pink house next to Napstablook's
house.
5. The program name will change at various points due to in-game events. During
the Mettaton's musical, for example, it will change to "UNDERTALE the Musical"
6. Papyrus is named after the font he speaks in, and (Comic) Sans similarly
speaks in his namesake font. When Sans is speaking seriously, his font changes
to Sans Serif
7. If you kill Sans multiple times on the genocide run (by reloading an earlier
save), he will comment on this effect:
After killing Sans once "... that expression on your face... ...well, i won't
grace it with a description."
After killing Sans two or more times "... that expression that you're wearing...
.. you're really kind of a freak, huh?"
8. Similarly, killing Asgore multiple times and reloading causes Flowey to
comment on this, asking if you are trying to befriend him / join his fanclub.
9. Contrary to popular opinion, you can very easily reset your game after a
genocide run with no long-term consequences. On windows, type in %appdata% in
the start search bar, go to AppData\Local, then undertale, and delete the
folder's contents. It iwll bring you to a clean slate.
You can also edit the configuration file to change your name, give yourself
more gold, increase your LVL, and loads of other goodies.
10. Waiting long enough in certain areas, or backtracking in certain areas,
causes Flowey to pop up for a very brief moment.
11. The Nice Cream’s effects change depending on the player’s LV. At a lower LV,
it heals a lot and has cheery use text. At a higher LV, it heals less and the
use text becomes colder (“There is an illustration of a hug”, “This cream is as
nice as you are”).
Conversely, Instant Noodles is more effective at a higher LV. At a certain point
the player just eats it raw.
12. If you call Papyrus (w/o Undyne) in the dump where the golden flowers are,
he asks if they talk and so say ‘hi’ for him
13. In Alphy's underground laboratory, if you sleep on one of the beds for a
long time, a ghost hand will pop up and tuck you in while you're sleeping.
14. Undyne's letter can be dropped. Talking to her again gives you Undyne Letter
Ex., which cannot be dropped.
15. If for some reason you're very unobservant and don't know this already, most
all?) of the game's soundtrack / sound effects can be found in its installation
folder, in the ".ogg" music file format
16. A list of all ingame items and their descriptions can be found here:
http://rawr.ws/undertale/
(scroll down halfway)
If you have Aspbergers and want to see commentary on every ingame item/monster,
you can find them here:
http://www.arrpeegeez.com/2015/10/undertale-walkthrough-items.html
http://www.arrpeegeez.com/2015/10/undertale-walkthrough-monsters.html
17. The previously mentioned site has a complete list of all known endings on a
flowchart, which can be found here:
http://rawr.ws/undertale/endings.pdf
18. Undertale has... interesting system requirements
http://i.imgur.com/pfJEC4A.png
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
*Gaster / Room glitching*
*-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=*
1. Data miners are still at work, attempting to discover if the character known
as "Gaster" is just a cut character/easter egg, or something more. You can
trigger citings of him by editing the "fun" value in the configuration file (see
#9 under Misc. section) to specific values in certain rooms. Certain characters
allude to his presense as well. As of writing it is unclear if the "fun" value
is functioning as intended, or if the game will be patched in the future to
allow these sightings to happen "organically" within the game itself. (there is
an issue with "fun" being capitalized that is potentially an oversight in the
game's code).
A much more thorough compilation than I have time for of "Gaster" events can be
found here:
https://steamcommunity.com/sharedfiles/filedetails/?id=520337707
a less complete and not as good list of Gaster events can also be found here:
http://undertale.wikia.com/wiki/W._D._Gaster
My personal favourite is the wingdings and "Entry 17", a hidden message in
windings font (a simple letter substitution cipher) that reads as follows:
"DARK DARKER YET DARKER
THE DARKNESS KEEPS GROWING
THE SHADOWS CUTTING DEEPER
PHOTON READINGS NEGATIVE
THIS NEXT EXPERIMENT
SEEMS
VERY
VERY
INTERESTING
WHAT DO YOU TWO THINK?"
A minor update to this section: I've combed through the text extract (see the
first section in this guide for a link to it). I believe there isn't anything
more to the Gaster character than already known in the Steamcommunity
compilation, and that it is nothing more than a minor easter egg (no additional
endings or big secrets). More of the gaster releated events can be found in the
text extract by searching for "But the old Royal Scientist" (note quotes), and
that entire section is about him.
Even the above "photon readings" message is in the text dump, so I doubt there
is anything more.
2. Certain hidden rooms can be accessed only by changing your Fun / Room values
to specific ones. Most of them are not very interesting, and either are related
to debugging, or dropped/incomplete content. Not worth looking into unless youre
REALLY into this sort of thing, but I included it for completeness sake.
A full list of everything known so far can be found here:
http://rawr.ws/undertale/
Incidentally, you can find a few useful things like a .rar archive file of all
sprites in the game at the above link as well.
Fun:123 Room:123 Undertale rosette room
https://www.youtube.com/watch?v=BPm1fNdUPcE
Compilation of a few hidden rooms, rather boring except for the hidden sound
test room:
https://www.youtube.com/watch?v=b3lF83_60cw
room of dog:
https://www.youtube.com/watch?v=zq3XYneTFoE
This occours when you change your room number to an unknown/unaccessable value
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