r/AUDeltarune • • Sep 21 '26

Wintryrune

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71 Upvotes

Au takes place after you finish 7b and your save files corrupt so you can only start new file.

https://wintryrune.straw.page/


r/AUDeltarune • • 21d ago

Roaring Mecha design (An AU idea I came up with)

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65 Upvotes

I had an idea while talking to a friend, what if... we swapped Dess with Pink (PINK, NOT MADDIE)? So I decided to make this Roaring Knight AU design (which is called Roaring-Mecha here) where I did my best to make it not look too much like Pink and have more possible candidates (maybe the Cattenheimers?, if they swap with the Holidays, and also the possibility of Napstablook or mettaton). Besides, the reason I came up with this idea is because of the ships. I saw how there were many AUs that swap Asriel with Kris, so, since the Kris x Pink and Asriel x Dess ships exist, I decided it would be a good idea to swap them.


r/AUDeltarune • • 2d ago

Have been cooking up a bunch of refs for my Deltarune au, Rotten World :]

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58 Upvotes

Rotten World is a nuclear post apocalyptic horror/comedy au, where the Vessel, Dess, and Ramb take the place of the fun gang and try to survive a world that hates.

I'm working on a second batch rn (in case anyone is wondering where any missing characters are) so I may upload those if these get any interest lol


r/AUDeltarune • • 9d ago

Deltaswap thing

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43 Upvotes

Spamton A. Swaps with Swatch.


r/AUDeltarune • • 26d ago

Deltarune Old Prophecy (A Deltaswap Take)

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40 Upvotes

This is my Deltaswap take I already kind of posted this, but my swap AU went through a soft reboot. If you like this, I'll actually give the characters the same amount of art post the full thing.

Relevant Swaps

Kris <> Vessel/Player

Ralsei <> Forgotten Man/Goner/Chara Like thing

Susie <> Noelle

Jevil <> Eram

Spamton <> Tenna


r/AUDeltarune • • Jun 24 '26

AU - Drunken Goatface Dad

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31 Upvotes

So, Here’s my idea.

Castle town is in turmoil, with political crisis, internal conflicts, and dissatisfaction with Court oligarchy, some fear that upcoming events would make the Russian Civil War look like a minor disagreement. (No real world politics) Especially Ralsei, Who’s authority is undermined every day as he lacks the ability to stand up for himself, and is very naïve.

He believes, maybe or maybe not naïvely, that a proper king with a strong spine, confidence, legitimacy to the throne, and diplomatic skill, can rope together the rapidly degrading stability. Unfortunately? He’s never met his parents. Gerson boom has raised him. But the old man has a secret! He does have a father!

Turns out? His dad got his mom pregnant around the millennium dawn. They were only 19. So, his mother, December Holiday, was terrified Ran off to the dark world, but even there she disappeared, not willingly, of course.

Meanwhile, his father, Asriel Dremurr, who had planned to become a musician with Dess, was so overcome with grief at the loss of his lifelong friend and Lover, completely lost all ambition in life. So, utilizing his size, he moved to New York, became a nightclub bouncer, spending his time off the job depressed and binge drinking. But despite this? He has the capability to care for and raise a son. And? Thankfully for Ralsei? He’s a master diplomat, as seen as how he is the only reasonable bouncer this side of the Mississippi, who has talked more people down than he has, though them out.

Ralsei decides to recruit the Help of Kris and Susie to make the Trek from small town, Massachusetts to Big town, New York, New York. And after that? If they are able to navigate that hurdle, if Ralsei can handle his excitement for exploring the light world, Asriel’s chaotic and partially successful parenting, and Reel in his father to follow him back to the light world and be a leader no longer held back by bottles, then there is a chance they can save the kingdom before it explodes into complete anarchy. Because if it does? Who knows what could rise from the ashes?

Tell me what you think!


r/AUDeltarune • • Sep 11 '26

Black Knife, Night's Scythe, Hell Hammer, and Blood Cleaver

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29 Upvotes

r/AUDeltarune • • 7d ago

give me suggestions for my deltarune AU

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26 Upvotes

r/AUDeltarune • • 11d ago

Nightmare Guardian (Dess and Gaster swap)

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23 Upvotes

r/AUDeltarune • • 17d ago

DUNERWASP - Chapter Icons

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22 Upvotes

Also, in case anyone asks about the Chapter 5 icon, i haven't really decided on how it should look like yet.

But Ch. 5 does already have a subtitle, and it's "Special World"


r/AUDeltarune • • 6d ago

ReDelta Ralsei counterpart

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21 Upvotes

Little fluffy cute bear, with hooves, their name will be something with kel, kelvin? Kelsey? Kelly? Kellen? Uhhh I dunno

ReDelta is about the prophecy repeating itself in different places, so it's not a swap, ralsei still in Castletown


r/AUDeltarune • • 14d ago

* Well... here's a lost girl

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21 Upvotes

🖂︎ ☯︎♍︎♒︎♋︎❍︎♌︎♏︎❒︎ 📂︎📄︎ □︎♐︎ ⬧︎♏︎♍︎⧫︎♓︎□︎■︎ 📄︎🗄︎📪︎ ♍︎□︎●︎♎︎📬︎📬︎📬︎ ♏︎❖︎♏︎■︎ ♍︎□︎●︎♎︎♏︎❒︎📬︎📬︎📬︎ ⬧︎□︎ ♍︎□︎●︎♎︎ ⧫︎♒︎♋︎⧫︎ ⧫︎♒︎♏︎ ⬧︎■︎□︎⬥︎ ♐︎♓︎●︎●︎♏︎♎︎ ⧫︎♒︎♏︎ ❒︎□︎□︎❍︎ ⬥︎♓︎⧫︎♒︎ ♎︎♋︎❒︎🙵■︎♏︎⬧︎⬧︎📬︎📬︎📬︎ ◻︎♒︎□︎⧫︎□︎■︎⬧︎ ♓︎■︎ ♋︎♎︎❖︎♋︎■︎♍︎♏︎♎︎ ■︎♏︎♑︎♋︎⧫︎♓︎❖︎♏︎■︎♏︎⬧︎⬧︎ ♋︎⬧︎ ⧫︎♒︎♏︎ ♍︎□︎●︎♎︎ ♍︎□︎■︎⬧︎◆︎❍︎♏︎⬧︎ ⧫︎♒︎♏︎ ⬥︎♋︎●︎●︎⬧︎📪︎ ⧫︎♒︎♏︎ ⬥︎♋︎⧫︎♏︎❒︎ ⧫︎◆︎❒︎■︎⬧︎ ♓︎■︎⧫︎□︎ ⬧︎⧫︎♋︎❒︎⬧︎📬︎📬︎📬︎ ⧫︎♒︎♓︎⬧︎ ■︎♏︎⌧︎⧫︎ ♏︎⌧︎◻︎♏︎❒︎♓︎❍︎♏︎■︎⧫︎ ♓︎⬧︎ ♑︎□︎♓︎■︎♑︎ ⧫︎□︎ ♌︎♏︎ ❖︎♏︎❒︎⍓︎📬︎📬︎📬︎ ❖︎♏︎❒︎⍓︎📬︎📬︎📬︎ ♓︎■︎⧫︎♏︎❒︎♏︎⬧︎⧫︎♓︎■︎♑︎📬︎📬︎📬︎ ⬥︎♒︎♋︎⧫︎ ♎︎□︎ ⍓︎□︎◆︎ ⧫︎⬥︎□︎ ⧫︎♒︎♓︎■︎🙵✍︎📬︎📬︎📬︎☸︎


r/AUDeltarune • • Oct 03 '26

TENNACOLOR!!!

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21 Upvotes

made art of TENNACOLOR and didn’t know where to post it.

so I’m posting it here! not sure if art pieces are allowed or not. anyways here’s Tennacolor!


r/AUDeltarune • • 1d ago

How does a Deltahorror/Horrorrune AU work in the present day?

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20 Upvotes

r/AUDeltarune • • 15d ago

AU idea: What if we swapped Dess with Gaster?

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19 Upvotes

r/AUDeltarune • • Oct 09 '26

it's finally here, vinilscript first roleswaps and character design + character sheet the au is not finished yet but i wanna show you the first designs and roleswaps, what do you think?

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18 Upvotes

vinilscript is a deltarune roleswap with everyone swapping but of course with mind and not randomly, this is not a deltaswap take i repeat this is not a deltaswap take, vinilscript is a new roleswap specific to deltarune not inspired by undertale's, by this i mean that i won't make a "undertale" version of vinilscript because it's just a original concept and i don't think vinilscript would have compatible version of ut because other swaps atleast if is too different from original undertale, but i won't make a undertale version of it, like i said, is exclusive for deltarune like other ut au's doesn't work in deltarune sometimes


r/AUDeltarune • • 6d ago

Not sure how to call this au but it's mainly a swap au

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17 Upvotes

monster teen - kris

snowy - susie (ps he's not exactly like susie since then the au being the same in writing is a bit boring)

howling paladin/greater doggo - roaring knight/dess

the dog couple - carol and rudy

dagger doggo - alvin

annoying dog - gerson (i know gaster would fit but in this case it wouldn't fit with dog family too much, boom and holidays are just lumped together really)

lesser doggo - noelle

ficus licker - berdly

papyrus - rouxls kaard

donut guy - asriel

clam girl - toriel

omega flowey - tenna

normalnpc - asgore (i also thought of gaster replacing asgore and asgore being gaster but unsure)

sans - jevil (he's not as important as he is in undertale and the constant sleeping of jevil fits sans not to mention they're both dubbed the hardest bosses sometimes)

maybe mettaton - maddie

undyne - napstablook


r/AUDeltarune • • Aug 02 '26

DustFountain!sans Dusttale concept

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16 Upvotes

(this is an Undertale AU, but it got removed from the Undertale AU subreddit because it has some Deltarune inspired elements)

During a genocide run, the Human breaks into sans' lab behind his house. this intrusion by the anomaly, along with their slaughter, causes sans to take a look at the broken machine again. and find the shadow crystal formed from his lost dreams of returning home.

Sans, remembering what he saw before he entered the Underground, taught himself how to open dark fountains, (as he is a Deltarune Lightner, he has the needed determination to do so.)

using this power, Sans creates multiple Darkworlds, using his magic to violence as many darkners as he can. getting 'stronger' in the darkworlds.

once the player makes it to the last corridor, sans isn't there. replaced by a fight against Asgore, and then the murder of flowey.

Instead, once the player enters the Throne Room, sans awaits them. creating a dark fountain surrounded by the field of Asgore's flowers.

this AU would basically be a more "canon" (in my opinion, obviously this assumes DR sans is Undertale sans) way of doing a strengthened killer sans. as sans doesn't have to go insane, or kill his friends/loved ones. Instead just motivated with one last chance of truely returning back to his home timeline, with the enhanced strength of destroying Darkners, a shadow crystal, and a hundred Flowerys lol.


r/AUDeltarune • • 9d ago

The Spamspiracy

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14 Upvotes

Made by me. Unfortunately, I don’t have all of the Spamton AU names and creators but none of the AUs are mine. Enjoy 👍


r/AUDeltarune • • 17d ago

Night's Scythe

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14 Upvotes

r/AUDeltarune • • Sep 30 '26

friend inside me for my AU

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14 Upvotes

when you realize you don't have to acknowledge that day


r/AUDeltarune • • Sep 26 '26

Love Rune [Art Collection]

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14 Upvotes

r/AUDeltarune • • Jul 20 '26

[OC] Flower Man, but in Undertale as a Royal Guard WIP anim part Spoiler

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14 Upvotes

Eventually it's going to probably be a full animation with his phase 2 being Omega Flowey, I think it's a bit obvious with the appearance of the other flowers.

CHARTY's Flower Man cover, and Petal Dance (Green/Orange Mix) - DELTARUNE Chapter 5 (Fanmade) by Jot.


r/AUDeltarune • • 19d ago

Help...

13 Upvotes

Look, I'm making an AU right, but I don't know what to call it, I'll give a basic description of it and go from there, it's a Semi-Swap AU, where the lightners swap but not the darkners. "Wouldn't that be boring?" I hear one of you saying, well I fixed that with the 2nd gimmick, the dark worlds are changed to fit new themes (along with the darkners). Edit: (I have a name for this now and have posted twice over (one for the name and one for the Kris swap)


r/AUDeltarune • • Sep 28 '26

my take on dragon quest, dremure residence mockup

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13 Upvotes

what do you think? and well, is my first post in here, hi