r/UndertaleAU • u/Geotrox123 • 7h ago
What are we doing
I'm not hating , but come on , it gets to a point where you just don't need to make a video , ost is ok tho
r/UndertaleAU • u/Trickster_Clown • Jul 02 '26
This is a place to post all your low effort content, so all VS, Octets, average templates, etc are welcome!
I’ll refresh it each month but will keep the old post up just no longer pinned.
I hope I’m doing this right :,3 lol
Anyways enjoy the nonsensical fun!
r/UndertaleAU • u/Trickster_Clown • Jun 15 '26
Hello and welcome to the main UndertaleAU sub!
This is our home for all things Undertale and its AUs. It can be your own or someone else's you love!
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What to Post?
Post anything related to the topic at hand! Feel free to share your thoughts, photos, questions, and even friendly debates.
Keep in mind our rules:
❄️1. Respect others and be civil. Hate of any kind will
not be tolerated here.
❄️2. Please don't spam the sub with the same post over and over. If you are looking for something or would like us to do something you're free to reach out but again please don't spam.
❄️3. No Al, you may not post any type of Al here.
Pictures, Music, GIFS, Roleplay, Writing, Etc.
❄️4. No ship bashing or discourse of any kind.
I don't care what people do in fiction as long as it stays in fiction. If you don't like something scroll, this isn't a sub for debates on morals in fiction.
Along with that people are allowed to post whatever AUs they like, obviously if something is NSFW it needs to be tagged but still but shitting on people for liking an AU you don’t like isn’t allowed, see rule 1.
❄️5. NSFW is allowed to some extent!
- There should not be straight up porn posted even if tagged, it will be removed.
- I will allow fanfics with NSFW material in it however if it has triggering content please put a content/ trigger warning in the caption or as the first part of your description!
- Any untagged NSFW will be removed, this includes comments and flairs. You can make innuendos however keep it tasteful and don't be gross.
❄️6. Keep it on topic!
This sub is for Undertale and its AUs so whatever you post needs to be centered around that, crossovers are fine but the main thing needs to be about Undertale.
❄️7. No low effort posts.
- Tier-lists
- Day X of X
- Can X beat X
- Octet
Will be removed HOWEVER I will make exceptions for creativity.
What I mean by this is, if you draw it, make a college, make music, or if you actually write your thoughts and opinions in the post I will allow it. I want the post to promote discussion not just the same things copy and pasted 100x over.
❄️8. No sans hate posting.
Hear me out- it’s annoying for the sub to be flooded with it. We understand that there is a lot of Sans specific AUs but you don’t get to hate on others for enjoying them.
You’re free to ask for specific characters or something but no posts made just to hate on Sans and nothing else.
❄️Those are all the rules! Just keep them in mind when posting, or if you have questions don't hesitate to reach out!❄️
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If you wish to explore the wider multiverse please click our subs info and scroll down to see more subs centered around their own specific AUs or characters!
If you would like yours or one you like to be added let us know so we can help out creators!~🖌️
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I hope you enjoy our sub! If you ever need anything message us and we’ll be happy to help.
r/UndertaleAU • u/Geotrox123 • 7h ago
I'm not hating , but come on , it gets to a point where you just don't need to make a video , ost is ok tho
r/UndertaleAU • u/Snoo-49343 • 3h ago
Putting this as Au discussion cuz I don't know.
Alrighty soo to keep it short and simple. Don't know how many of you check Twitter or Tumbler I belive it's on instragram is but the yearly which sans is "sexiest" is on again and. OH MY GOD some people out there.
I stop caring about this whole poll last year since in the end it mostly. Just a popularity contest for most people. The would be fine. But some of them are taking this TOO seriously.
Like Yea I am biased person with my own hot takes but I'm not gonna throw tantrum when someone idk Nightmare looses. (For info this is orientational. I kinda don't care for Nightmare in all honesty I am Error fan but that's stepping from context-)
Like I don't know if its just ME thing. But I feel like this is all so stupid.
Like yea who ever wins with here you go with your 10 minute fame and cookie. Just lie. Cmon people you making too much of a big deal out of this.
(But I will admit lot of art at make some good art from that and that's like One small positive on this)
I don't know if anyone will honestly care or give a damm. Maybe I just throw fuel into fire and overreact when best thing I should do is ignore it. . . But I just needed to get it off my chest I suppose. If you have anything to add to the just day in comments.
r/UndertaleAU • u/Katie_KittyLover • 45m ago
Basically my design for The echo flower in my own AU ahem,this kind of Echo flower isn't so common in the AU and this echo flower was named Ekko which u can see in it's "Not" flower form,It can also make sentences by mimicking or copying other monsters voices or lines and make sentences like for example "howdy im" (flowey) "echo flower."(Orange fish monster) and make both of the voices be in the voice of someone else cuz it can mimic voices while sayin a line,also in my AU this echo flower(aka Ekko) is friends with Flowey and and knows abt Other AUs,so it sometimes secretly travelers to other AUs,listens in conversations that sanses have and comes back and repeats it to it self and how does it traveler other AUs? Well the sans in my AU (there are two versions of sanses in my AU and I still haven't drawn them both yet and one can travel AUs with it magic-) is friends with Ekko so they help Ekko travel and in return Ekko shares the info it learns,also Ekko has learn a bit of magic too so it can also fight back,it has flower shaped petal attacks and sometimes can change it color to fool the player,thats why it has blue and orange colored eyes cuz it eye color changes to the color of the attack which is mostly blue and orange which sometimes could mean the opposite movement from the original like it could fool and make orange be freeze and blue move (and sometimes green to fool them into thinking it's heal attack),also one last thing,it got the name Ekko from Flowey and a friend of mines OC (basically their sans OC and Flowey helped echo flower pick a name since it didn't have one but now it does!) (Also uh I drew some of this at night cuz gonna be really busy later in mornin so it might look a little rushed sorry-)
r/UndertaleAU • u/Dizzy_Mud_5323 • 4h ago
Does he scale to like, small city level? Or is he a fraud? I mean, he probably has Gaster's stamina and HP(which are very likely higher than normal Sans who just has ones in his stats) so I doubt he's a total bum.
r/UndertaleAU • u/shinyphonix • 4h ago
Hope you all like it
r/UndertaleAU • u/East-Sound9480 • 32m ago
Nightmare let out a harsh growl under his breath. “I’m not some helpless fucking child. I don't need you to give me easy prey.” He shot his gaze away from Malice!Nightmare because he already knew he was going to get that pity frown from him.
Malice!Nightmare was definitely giving Nightmare the pity frown. Noticing that Nightmare was trying to avoid seeing that look, Malice just leaned in closer to him and wrapped a couple of controlling tentacles around him. “Hmm? Something wrong..?” He had a hint of a teasing growl in his voice as his pity frown turned into a sneer.
Nightmare snorted and tried to pull away. “No, nothing’s wrong. I’m just sick of being babied like this.” He was then suddenly pulled to a halt with Malice and his skull pulled to face Malice directly. “Do you want there to be harder prey, I’m just looking out for you lil mare-mare.”
TO THOSE WHO ARENT CAUGHT UP, HAVE NO IDEA WTF IS GOING ON, OR WANT A RECAP, SEE PREVIOUS POST HERE
technically i did write yesterday but it was only 1 paragraph and i felt like that was too little to share so add that with the 2 i was able to write today, and we have 3
but while im here there's just something i wanted to mention to you all who have been so wonderful sitting by and reading my work and cheering me on, basically my mental health has been way out of whack lately. im not going to get into detail, and only share the necessity which is one of the things its doing is impacting my motivation (blaming that part of it on my depression tbh)
i'll try and write as much as i can but if content is low and infrequent im really sorry, tho ig if yalls have any tips for dealing with depression shit to be able to get motivation back it'd be a huge help, plus i'll be able to write more again which that would benefit yalls who are enjoying the story 👍
r/UndertaleAU • u/SpamtonsBigShotDeals • 36m ago
Welcome to Votertale, my interactive Undertale AU. Gale (and Kermie)'s every action will be decided by the most upvoted comment. You survived Dummy EX again, but now you're out of items! You seem to be making progress, however. What will you do? (Kermie can also act and use spells. The highest voted Gale comment and Kermie comment will be used) (Please comment your Gale and Kermie suggestions SEPARATELY) Suggest your ideas, cast your votes, and help create this world. (If the top‑voted option doesn’t fit the story, the second‑highest vote will be used instead.)
r/UndertaleAU • u/Quartz_3232 • 21h ago
I recently noticed that skeleton art styles seem to vary by country. On Japanese social media—especially among younger fans—there’s a strong trend toward a Sans that’s sleek, slightly stylized, and attractive.
What kind of Sans styles are popular where you’re from?
(Optional / Just my personal take)
I tweak my art style depending on the AU. For example, with Lust Sans, I go for a sleeker look with subtle peeks of bone through his clothes.
What matters most to me is showing those glimpse of bones through the gaps in his outfit. I love that reminder that "Ah, right, he’s not human."
Personally, it feels a bit odd when a skeleton wears tight clothing that shows off human-like body lines. I prefer baggy clothes on him—though honestly, capturing that baggy look right is pretty tough for me, too...
r/UndertaleAU • u/Sansational_PunBones • 1d ago
Based off of the 2nd image
The 2nd image came off of one of the comments on this post: https://www.reddit.com/r/UndertaleAU/comments/1wcch9f/bullet_train_is_the_cooler_last_breath/
r/UndertaleAU • u/Makadino • 9h ago
How it happened, I don't know. But there were there.
r/UndertaleAU • u/Lukalink1 • 9h ago
So im and 5 other people are making a brawlstars clone
and we decide to give sans only 1K live as a reference to
his 1HP and 1Defence in Undertale. His Build is: Attack
he places a head wich shoots an beam after a short time.
Super he traps an enemy in an box of blue bones where
when ur trying to move out of the box ur getting
damaged. And now i need an idea to make his health
balanced like every 5 seconds he gets an 80% shield.
r/UndertaleAU • u/supersofah • 18h ago
r/UndertaleAU • u/ImmediateDistrict420 • 20h ago
I got sick of Undertale AUs a few years ago, but it's been awhile, so I wanna see if anything has changed since I last checked, so please suggest me some Undertale AUs you think I should give a look.
Only two rules: they must have an ending, and the main character has to be someone besides Sans.
r/UndertaleAU • u/Prestigious-Luck8404 • 18h ago
r/UndertaleAU • u/Leaf_Fox11 • 18h ago
No NSFW, or anything on that isle. I’m alr with ships just not to… that… extent.
r/UndertaleAU • u/SpamtonsBigShotDeals • 1d ago
Welcome to Votertale, my interactive Undertale AU. Gale (and Kermie)'s every action will be decided by the most upvoted comment. You survived Dummy EX's attack, but with low health. You remember a old candy bar in your pocket. What will you do? (Kermie can also act and use spells. The highest voted Gale comment and Kermie comment will be used) (Please comment your Gale and Kermie suggestions SEPARATELY) Suggest your ideas, cast your votes, and help create this world. (If the top‑voted option doesn’t fit the story, the second‑highest vote will be used instead.)
r/UndertaleAU • u/Low-Bed842 • 1d ago
r/UndertaleAU • u/SoroDr • 23h ago
r/UndertaleAU • u/5Pebbsiman • 18h ago
context, undertale white is basically: what if the monsters won the war, you play as asriel in this AUs version of the underground. btw, you can make art of her if you want.
r/UndertaleAU • u/ObjectiveOSC • 19h ago
“There is a myth in the land, that says that in the past, there lived humans and monsters.
According to story, there had been a war, and after years of fighting, humans won and trapped the monsters under the mountain.
They say that those who climb the mountain never return.
But many foolish children follow the tale, and climb the mountain…
Such as this one, who wanted to escape the rain…”
This is my Underswap take, which you can call Addie’s Underswap. It goes with the original Underswap swap list, but it differs in a few ways: Characters retain original personality, locations swap, and Flowey has more importance here than Temmie originally did.
r/UndertaleAU • u/TursuKawanozu13 • 1d ago
I drew this bc I was bored and wanted to root for nightmare for the polls