1 - 20 of 3,191 Works in Sans Ensemble (Undertale)
Navigation
Listing Works
-
Tags
Summary
You, dear reader, have been transported into your own AU — as Sans.
Just when you’d begun to settle into this new, bone-white life, one small mistake sends everything spiraling.A malfunctioning machine, a flash of blinding light, and suddenly you’re falling through worlds — each one a reflection of stories you once imagined, and others you never dared to write.
Gaster calls it an experiment. Papyrus calls it an accident.
But Sans — your Sans — knows it’s something deeper.Every jump takes you further from home, and closer to the truth behind the tether binding your souls.
Will you find your way back… or lose yourself to the story you created?Whatever happens — the worlds will never be the same now that you are part of them.
-
Tags
Summary
Cross has been watching you for a while now. Really, the only thing he could do now that Nightmare had called a truce with the Star Sanses. He’s getting real sick and tired of how little you take care of yourself. When you catch a rather nasty cold due to your carelessness, he finally snaps.
-
Tags
Summary
Dust set his books down on the coffee table, managing to avoid collapsing. Where were the others? He looked around. The supply run had been mostly successful, but it had done a number on him. Dream had thrashed his ass, then Blue and Ink had handed it back to him neatly. There was also the problem of that human he had brought back…
This is my first fiction, so ignore it if it’s very cringe. Thanks!
-
Kidnapping the Boss and giving him the happy childhood that he deserves by catdemonakatsukigirl
Fandoms: Undertale (Video Game)
11 Nov 2025
Tags
Summary
When Killer decided to bring some unknown science experiment into the castle, the last thing they expected was time travel. But hey now they have the most adorable baby bones ever, their boss Nightmare who doesn't know who they are and oh yeah is also 5.
-
Tags
Summary
In which dream is sad and traumatized and is also very tired and exhausted
Series
- Part 2 of Mute Dream AU
-
in your arms (with me) by Loafacats for Evans_Multiverse
Fandoms: Undertale (Video Game)
11 Nov 2025
Tags
Summary
dustmare fluff. literally just dustmare fluff. 👍👍
-
Tags
Summary
When someone insults Cross, Nightmare steps in, not with anger, but with calm, precise protection. Horror, Killer, and Dust back him up, their loyalty fierce and unyielding. Family isn’t about perfection, it’s about keeping each other safe.
[Novembmare - Day 11: Family]
Series
- Part 79 of Undertale Fics
- Part 89 of One-Shots / Two-Shots
- Part 27 of Prompt Fics
- Part 12 of Undertale Fandom Event fics
-
Tags
Summary
In the year 40XX humans and monsters have successfully established colonies in planets far away from our own, in other galaxies. Polaris VI is one of the many missions to deliver supplies to a space station overseeing one such colony. With Cross as the commander, Killer as the pilot, Dust as the medical staff onboard, and Horror as the engineer, this mission should be successful and be back on earth ten years after departure, as scheduled… little do they know this mission will change their lives forever.
Updates every monday!
-
Palettes Hero Academia by GenericTown123
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Undertale (Video Game)
11 Nov 2025
Tags
Summary
Palettes journey to becoming a hero and making His Parents proud!
Palette was so excited for School! His Mother, Dream, had been so against it. However, after the incident with his uncle Nightmare, leading to him almost dying, His Mum had agreed to allow Ink, his father, to hide him where Nightmare could not find him, away from the AUs and into a different Multiverse altogether. A world that had real life superheroes, and much to his budding excitement, hero School!
A crossover between MHA and the UTAU shipkids.
-
Tags
Summary
I am hosting a DTIYS challenge for passing 10k hits!
More info on CH19(As of 28/7/25 the first chapter has been rewritten to improve the flow and clarity of the story.)
(I will continue to edit earlier chapters bit by bit. When I'm done, I will announce it in later chapters.)
--
Error's done. Fate has been in control of his life for too long. He doesn't want to do this forced job anymore. No more. So he takes a risk.A risk that eventually makes Error terrified of what's to come. More for the ones he calls family than for himself.
Ink realises he's not the only one suffering from fate. He's just as trapped as Error is in this forced job. So Ink does the best thing he could think of. He helps. Well... That leads to more problems for both of them.
Fate will never go easy on them again.
or
FGOD Error and Ink are taken by Fate because Error broke the rules, and Ink discovered that Error is experiencing the same struggles as him. The multiverse Sanses must rescue them.
--
This series will be split into two parts:
Part 1: Entangled in Ink and Strings 19/?
Part 2: Stitched up at last(FGOD error belongs to harrish6)
Series
- Part 1 of Free at last
-
Tags
Summary
Killer lived his whole life by following 3 crucial rules, what happens when he accidentally breaks all of them?
How does he cope with a world that is slipping away from him as he struggles to keep himself from spiralling?
Can he help everyone or will he fall?
-
Tags
Summary
Decided the world needed a sans au dating sim. In the form of a choose-your-own-adventure story.
-
Tags
Summary
The first story of the series. Follows our protagonist through his rebirth and until he (re)enters the Multiverse.
In case you couldn't tell I suck at summaries, I'll get better eventually, probably.The Major Character Death Warning is temporary and happens multiple times btw, it is a little confusing at first but you will understand as the story continues.
Prologue: Rootverse's Collapse (1)
Arc 1: Rebirth (2-7)
Arc 2: Meeting Familiar Faces (8-?)
Sub Arc 2.1: The Teeth Incident (20-41)
Sub Arc 2.2: The Magic Incident (42-50)
Sub Arc 2.3: Time For Shopping (51-59)
Intermission: 1st Major Time Skip (60-62)
Sub Arc 2.4: The First Human (63-80)
Arc 3: ???Series
- Part 1 of Miseries of Metempsychosis
-
Tags
Summary
A mix of fluff, angst, and crack! Universe and genre used will be in each chapter's author note, along with chapter specific warnings.
-
Tags
Summary
Disclaimers:
Several details in this fic are heavily inspired by 'Blue joins the bad sanses' comic, so go check that out
Canon innacuracies: Passive and Corrupted Nightmare are the same person, Ink is the creator and not the protector, Ink, Error, Nightmare, and Dream, are all gods, Blue, Killer, Horror, and Dust's specific au timelines were all destroyed, and i took liberties with how the void works. Also, no Cross sans will be mentioned, i don't know enough about underverse, and there will be some OC non-sans God/entity/things later on. The fic will be split into parts, each lasting nine chapters.
Schedule: Once a week, on Saturday, Sunday, or Monday, and i will post art or a reference sheet with every chapter. Trigger warnings will be specified in chapter notes. I've never written for undertale before, so please let me know what you guys think :3With that said, the actual plot: After an injured Error crashes into Nightmare and Co's home, a close bond starts to form between the two gods, both forced villains. In light of Ink's attempt to kill Error, Dream finally starts to lose it, and Blue gets dragged along.
Average chapter length is 500-2000
Series
-
Tags
Summary
You have had a tough life that has left you scarred and untrusting of others. Growing up in a mage family obsessed with power and ensuring their lineage, you are the black sheep of the family, possessing a green soul of kindness and excelling in healing and growth rather than the combat magic your family specializes in. Trapped in a loveless relationship with a controlling, abusive partner chosen by your family to ensure a 'proper' match, you live in fear of triggering his anger, often resorting to your magic to heal yourself. Every aspect of your life is controlled by someone else, leaving you resigned to survival and scraping together what happiness you can.
What you could never foresee is the way a miserable night out with your fiance would lead you to a drunken one night stand with your soulmate.
Nor could you predict you would have 9 more soulmates out looking for you.
-
Tags
Summary
OG universe but the siblings are Swapdream instead of normal Dreamtale and Swan (Swapdream Nightmare) has the Bad Sanses with him (Killer, Horror, Dust and Cross) and then they all kiss
(and no, there is no incest..)
-
Tags
Summary
What happens when safety comes with a price?
-
SOUL's Divine Fire by Virtual_Faye27
Fandoms: Percy Jackson and the Olympians & Related Fandoms - All Media Types, Undertale (Video Game)
09 Nov 2025
Tags
Summary
Bridget Hartkroft would like to state, for the record, that when she left Camp she didn't expect to run into an entirely NEW Pantheon! That seemed like something a Big Three child or one of The Seven would deal with. Not a crippled daughter of Hephaestus that wanted to get away from her traumas and stop weapon making.
But here she was; Nowhere near her fellow Greeks, the Egyptians, Norse OR the Romans and she HAPPENS to be nearby when Magic-born Monsters finally escape their magically sealed prison and now she encounters a lot of Skeleton Avatars of Gods and their Mortal followers! At least with the creepy ones they kill the things after her and can be banished if she throws sharp pointy things at them when normal offerings don't work. The 'good' ones make her wish she could jump into fire like her half-brother could just so they would Leave Her Alone.
For the Undertale Multiverse when a new AU is born with almost as much divine energy coming from it as Reapertale they just HAVE to investigate! And that one weird SOUL-ed kid threw food and weapons at them they just HAD to stick around! But why was she so sad and angry all the time?
-
Tags
Summary
First kinktober ever, list isn't complete but trust it will be done by Halloween.
Dedicating this fic to my very very special friend of mine. Pookie, if you see this, ily <3
Uh yeah, hope y'all enjoy ^^