[NOTE: GRAHHHHHHHHHHHH!!!!! THIS PLAYLIST IS OUTDATED GRAHHHHH!!!]
I will NO LONGER be updating this playlist, as I have a different, more organized way of sorting AUs!
Please check out my NEW Masterlist below!
https://soundcloud.com/brandoneatsair/sets/masterlist-hub

My UNDERTALE AU Masterlist!
For every UNDERTALE AU I can find on SoundCloud.

Contains COMPLETE, INCOMPLETE, and ONGOING AUs.
We've reached the maximum with 500 tracks! (If some don't get removed)

DISCLAIMER:

Inform me if:
- You want an AU removed.
- An AU isn't in the playlist.

"Once Upon A Time" replacements / equivalents are used.
If there isn't one, the "earliest" track will be used.

I will be using ONE version of a track per AU.
Older / outdated versions will NOT be used.

Organization may be inaccurate. Inform me if I messed up!
Anything below COOL TALE is still unsorted!
(Trying to sort everything by naming convention / alphabetically!)

:ORGANIZATION:

UNDERTALE - Base OST - UNDERTALE
"Remix" - Reworked Base OST - UT: Alternate --> Swapped Rhythms: Advanced Reboot
"Sequel/Prequel" AUs - Sequel/Prequel to UT - STARCHILD --> DONTFORGET
"Personality" - Alters Story - underfellproject --> Fallen Kingdom
"Divergence" - Alters Characters - UT: Halloween Hack --> gone.ogg
"Swap" - Alters Roles - Bob Lion: UNDERSWAP --> NEGATIVESHIFT
"Combined" - Alters All of the Above - UTY: Halloween Hack --> FALLEN STARS
"Broken" - Wrong/Merged AUs - An Ordinary UNDERTALE Mod --> Help_Tale
"Megalo" - Megalo's take character roles - Recognized Maniacs --> Existential Oddities: Doom Island
"Crossover" - NON-UT - MOTHER: Bound Underground --> WYCCC!
"Self-Insert" - AU creators / OCs - Sewerstory --> Genericophony
"Multiverse" - Various NON-UT (+ AU creators / OC') - Tale of the Chilled --> INTERWOVEN
"Joke" - Joke / Non-serious AU - Stroyshift --> COOL TALE

UNDERTALE by Toby Fox
AUs/Tracks by respective creators
Cover art by me
Also check out my Deltarune Masterlist: https://soundcloud.com/brandoneatsair/sets/deltarune-au-masterlist

[OUTDATED] UNDERTALE AU Masterlist

instinctive music

GONERGLYPH OST

Here are some Au themes I found when exploring the SoundCloud website. Enjoy.                                   
Rules for this Au Playlist:                                              
1. If there's a new version of the theme that sounds better, that theme will be replaced with the new version.                                                                     
2. If a Au theme haves a motif that similar to that theme, it won't be added to this playlist.                   
3. If an Au theme sounds so bad that it should get a V2, it's added to the bottom Best to Worst themes

Update: I Updated picture because that other one was outdated.

An Once Upon A Time Undertale AU Compilation 2025

thumbnail art: https://www.deviantart.com/kohn-nz/art/DARK-608357846

Gastertale

UNDERTALE Soundtrack

Once Upon a Time

Yeah, I'm doing this.
Undertale Rearranged is a fun passion project where I attempt to rearrange all 101 tracks of Undertale.

UNDERTALE by Toby Fox.

001 Once Upon A Time - Undertale Rearranged

Not much to say for this one. It was fun experimenting with the composition.

001 - Once Upon A Time

IT APPEARS

YOU HAVE

FALLEN DOWN.

Fallen Down but it's Gaster. Inspired by this tweet:

https://twitter.com/callievinyl/status/1742313372861821074

Funny how Darkness Falls and Fallen Down use the same piano, huh?

FELL FROM HEAVEN

* Long ago, humans and monsters coexisted in harmony upon the surface of the Earth. 
* Their lives intertwined, they shared laughter, dreams, and the beauty of their world. 
* But peace is a fragile thing, easily shattered by fear and misunderstanding.

* It was an era of prosperity and unity, until the fateful day when tensions between the two races ignited into full-blown conflict. 
* The reasons for war have long been forgotten, buried beneath the weight of history. 
* In the chaos that ensued, the monsters, vastly outnumbered and outmatched, were driven to the brink of extinction.

* Forced to retreat, the monsters found themselves banished to a realm beneath the surface—an underground prison of eternal darkness. 
* Cut off from the sunlit world they once knew, they built a new civilization in the depths, clinging to hope of one day returning to the surface.

* Years turned into decades, decades into centuries, and the surface world forgot about the existence of their former neighbors. 
* Yet, the monsters endured, their spirit unbroken despite the harshness of their new reality.

* And so it was that many years later, fate would once again intertwine the destinies of humans and monsters. 
* On a quiet night, a child, the seventh of its kind, tumbled into the gaping maw that led to the monster's realm...
* A child whose arrival would set into motion events that would change the course of history.

* Little did anyone know that this child's journey into the depths would become a beacon of hope, a chance for reconciliation, and a test of courage and compassion. 
* For in the heart of darkness, where fear and despair lurk, a new story is about to unfold—a tale of friendship, adversity, and the quest for a peace long lost.

* This is the story of Undertale.

Echoes of Harmony

1) - One Fateful Day (jenfkejl)

[ * you're strong, kid. ]
[ * but i'm beyond strength. ]

sprite by @tweetertweer

ASGORE replacement for oneshift. Keep in mind that there are only 5 souls in Sans' possession during this battle.

077. catalyst (Unreleased)

* B-BERDLY! GET BACK FROM T-THOSE PEOPLE!
* W-WHOEVER'S THERE... M-MAKE YOURSELF K-KNOWN!
* (Geez, Noelle, you suck at this...)
* (Let me handle the confrontations.)
* Dunno who you losers are, but-
* ...KRIS???

--
Music: @bruhmoment0407

Survivors

Megalovania; vs.

I will release the FLM soon. 

Inspired by V1 and V2 of Teralazing by Zeroh and a bit of my own, I just transcribed the music as much as I could.

Clean art: https://www.deviantart.com/longnek/art/Teralazing-My-Take-1126925275

I don't know if anyone will actually want to see this

---------------------------------------

* You have been chosen as Papyrus 
* Be prepared to kill everyone 

I'm playing at being Zeroh, as you can see I copied everything, even how he wrote the description Lmao.
 I wanted to say that I was having some creative problems and my phone restarted several times while I was cooking this song.
 Well, I hope you have a lot of fun listening to this! I tried to recreate the instruments and leads, of course it's not perfect, my phone was asking for help to leave this song open lol.

Midi ( Midi has some random stuff, these things are some leads that I didn't use in the final version) https://drive.google.com/file/d/1QFZz4bfeN2kHfISHWYbSTJj2-iemmwka/view?usp=drivesdk

Teralazing by Kilo_Drac
Cover by me
Art by me, inspired in zeroh 🌹🍓
inspired by zeroh's cover

15h cooking

---------------------------------------

Please share with your friends!! I promise to improve next time! I'm sorry if this doesn't please you <3

ZEROH YT: https://youtube.com/@catsmirkk?si=_8F_7jVfTpu_CZRR
MY YT UPLOAD: https://youtu.be/EyRKOc-PyVE?si=z7drD7X01rucJTPt

TERALAZING Z : Simple Cover - FLM Recreation [ Special 300 Followers ] 🍓 + MIDI

This is the "400 Bad Request" replacement for my "Deltarune: The Otherer Puppet".

* WE UMM!
* WE GOT IT! SPAMMIN!
* YOU AND "Myself and I" DID IT!
* Myself and I? OR WOULD IT BE LIKE.
* "Me, Myself and" YOU?
* ...?
* OH THIS IS.
* THIS PART.
* OHHHHHH.
* HA.
* HAHA.
* HAHAHHAAHAHAHhahahHAHhAhaha!!
* Ok listen, Fishy.

* I know you've come a long way from...
* whencever you came.
* To partake in this fun and exciting journey of self-discovery!
* With me! the lowly and unassuming Cris!
* But in the interest of sportsmanship, I need to level with you.
* It's all been like. a joke. haha.
* Aside from the ice and loneliness, the fire and "loneliness"...
* I know what happens next. I'm supposed to fall into that dirty old water and come out some sort of phoenix.
* But uh. not only can I not do that.
* I don't actually need to! or want to! seems gross!
* So uh. I guess that means the game's over!
* You won! You made it to the end of the Cris story!
* The most pleasing end of the ones I studied, anyway.
* So we're done now! I'll be leaving!
* "I" do need to tear your throat out in order to leave this place, though.
* So just hold still. it'll hurt a lot, but only forever.
* "I think that's a GOOD DEAL!"

Deltarune by Toby Fox
The Other Puppet by topanon and @notrealnevereal
The Same Puppet by @overkill-the-sequel

[Deltarune:      othererpuppet]

WELCOME.
THANK YOU.
MANY THANKS.
WITH YOUR HELP.
THIS WORLD.
WILL BE
BLESSED.
NOW.
PROCEED.
MY VESSEL. . .
MY ANGEL. . .

LET THERE BE LIGHT

COMMENCE

🕆︎☠︎☠︎⚐︎📬︎
💧︎🕆︎👍︎☟︎ ✌︎ 👍︎⚐︎☠︎✞︎✋︎☠︎👍︎✋︎☠︎☝︎ ☠︎✌︎💣︎☜︎📬︎
✡︎⚐︎🕆︎ ✌︎☼︎☜︎ ❄︎⚐︎⚐︎ 👍︎⚐︎☠︎❄︎✋︎☠︎🕆︎☜︎📬︎
☼︎☜︎✌︎👎︎✡︎✋︎☠︎☝︎ ☹︎✌︎🕆︎☠︎👍︎☟︎☜︎☼︎ ✋︎☠︎ 🗏︎
📄︎
📂︎

mus_gonerwarp

* Gee, you look like you've never played a JRPG before...
* Pathetic. 
* BUT FEAR NOT!
* I shall instruct you, here, in the caverns.
* I host many DnM campaigns with my fellow game enjoyers!
* And as a dungeon master myself...
* I'm more than capable to explain you how things work!
(Battle starts)
* Let's see, let's see...
(Larpy brings out a handbook with him)
* Aha! The basics.
* Ok so...
* That over there is your HP.
* It stands for Health Points, and that over there is the EXP...
* EXP stands for Experience Points!
* The more experience you have the stronger you get!
* NOW, one important part you must know it´s how to dodge attacks.
(Larpy shoots a slow feather at you)
* Now, my fellow apprentice, if you wanna survive then dodge this attack.
* If it hits you, you'll get damaged and lose HP.
* Don't worry about it, if it hurts then you will be able to heal afterwards. 
(Unno dodges the feather and a small line appears around thier soul)
* Good, very good for a beginner.
* As you can see, by dodging attacks you get a little thing called Tension Points, or TP for short.
* These will help you use special acts during battle.
* Depending on your current status, you will be able to perform movements that might save your twelve.
(The battle ends)
* Well, that was the most basic part.
* Now, to be fair this isn't the best place for training.
* SO, follow me friend, as I shall escort you to our gaming hide-out.

Hawkeyes

L: * The next area is, uhh-
L: * This way!
L: * Wait, uhh- I don't remember there being mist here!
L: * Quick, get a lantern over by the stand there!

(* It says "GET A LANTERN FOR XXX, TAKE ONE", but the next part is grayed out and written on red marker which says "FOR FREE THIS TIME".)

DUNGEON

[SlightlyNudge] - Mysteriously Temperate

* Oh, trust me! I'm very, very, handy.

* Mysteryman joins your party.

==
Cover art made by kiwiquest (@kiwiquest)

Your Mysterious Friend

CREDITS:
Full song by: @dashingtoadie-the-sequel
-----

[* this is the once upon a time replacement of my au.]

* long ago, two races ruled over earth: humans and monsters.
* one day, war broke out between the two races.
* after a long battle, the humans were victorious.
* they sealed the monsters underground with a magic spell.
* many years later...

mt. ebott
201x

* legends say that those who climb the mountain never return.

001 - once upon a time.

Check out the original Soundtrack:
https://tobyfox.bandcamp.com/album/undertale-soundtrack

001 | Beginning Anew

PHOTON READINGS POSITIVE.
THIS NEXT EXPERIMENT IS
VERY
VERY
INTERESTING.
A NEW WORLD.
YET TO UNDERSTAND.
ITS FLOWS. . .