1 - 20 of 101 Works in Sans is Having a Bad Time (Undertale)
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Summary
Sans isn't looking after himself anymore.
He barely gets out of bed, barely showers, and barely eats.
Papyrus is making it big out there, and Toriel has the potential of becoming a teacher within her grasp.
Left alone to assume the role of Frisk's deadbeat uncle while everyone else achieves their hopes and dreams, he feels like he's been handed the short end of the stick.
Frisk decides the best way to help Sans is by shoving him into a series of awkward encounters with their single mother.
So, when Sans notices they're playing matchmaker to try dragging him out of his destructive cycle, he tries to stop it, though it's too late.
He already has a cute lady wanting to jump his bones and rattle him up, and all it took was making himself look decent for a date to McDonald's and Baskin-Robbins.
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Under the Water Oak Tree by BubblyShip
Fandoms: Undertale (Video Game), Hazbin Hotel (Cartoon)
14 Jun 2025
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Alasor had this tree in his room. Native to New Orleans, with thick narrow leaves that cascaded up into the dome of a ceiling. Just past that, the architecture was anything but quaint- with fire flies buzzing about the air of green and blue foliage. Somewhere, somehow, the sound of nature always chirped from that centerpiece tree.
Sans would have found the tree appealing. If he wasn’t trapped with it.
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Alastor weaseled his way to some fanciful contracts when a sudden influx of monsters in hells population occurred. One of those unlucky souls was a certain skeleton Alastor took a very intense, platonic liking to.
Sans is thoroughly not amused.
Series
- Part 3 of Sans x Alastor
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POV: You're a ketchup bottle and Sans is hungry.
Series
- Part 1 of AU Sans Crack One Shots
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There was no hope.
There was no way out of this place. Sans knew that from the depths of his soul- he couldn't escape on his own. But without any way to contact anyone and no knowledge of where he's trapped, all he could do was try to survive... or maybe just hope for death.
No more resets, after all.
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Cambria wasn’t supposed to survive the fall. But she did. And now the Underground won’t let her leave. Every time she dies, she doesn’t reset—she overwrites.
A slow-burn Undertale canon divergence featuring glitchcore, found family, emotional trauma, and a girl the world keeps trying to delete.
✧ Angst-heavy | OC-centric | Soft horror | Sans x OC | Overwrite mechanics | Sad girls who don’t stay dead ✧
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Spending Spring Break Underground by 4Trixs_Animations3
Fandoms: Undertale (Video Game), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
23 May 2025
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Once upon a time many centuries ago, the world was ruled by two species: Humans and Monsters. Both of these creatures thrived together using their special talents to help one another. That was until the humans declared war on the monsters out of the blue. This led to the monsters to be banished beneath a mountain.
But rest well when I say the humans suffered their karma. Without monsters they soon lost their magic, along with their way of life. They developed their own powers called quirks, with this power came the raise of heroes and villains. Quirks were quick to spread until only 20% lacked them.
It wasn’t long before magic and monsters were reduced to legend. This led many to climb the mountain to see if the legends were true, only to never return. This was because of the heartbroken monster king who put a bounty on every human who fell.
When the last human fell, the monsters were ecstatic. Finally they’ll be free to wander the surface and feel the sun and the rain again! But unbeknownst to them, they have become even more trapped than they had before. With each reset the monsters were forced to live the same day over and over without anyone knowing ... .Well, almost everyone.
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Drunk On Power (And Ketchup) by Cat_On_A_Keyboard, Chill_Phil
Fandoms: Undertale (Video Game)
17 May 2025
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Frisk has been trapped in the same loop for longer than they care to track. They can now consistently break the barrier or get to 20 LV without taking any damage. After getting to Snowdin (again), Frisk decides to try something different.
Proofreading by Chill_Phil
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- Language:
- English
- Words:
- 1,030
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 28
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A secret locked away by ftfan95
Fandoms: Mother 2: Gyiyg no Gyakushuu | EarthBound, Undertale (Video Game)
08 May 2025
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Sans is actually from another world, after a failed attempt to get to his world after defeating Giygas. The young boy wakes up in another world, as a monster with a human soul that he desperately tries to hide. Throughout constant resets, his mind and heart break down until he becomes almost unrecognizable as the emotionless but jovial monster we know him as.
Then elements of his past turn up and he begins to break from the inside out.
Old fanfic, will be getting a complete and total revision once I finish revising my other fanfic. This writing is nine years old. I was 22 then.
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There’s a reason Papyrus always wears gloves
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Papyrus has been hiding something from Sans. One day his gloves get ruined and Sans finds out
Series
- Part 4 of Sans has fucking depression
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Half-Tale: The Fallen by HolmesJaw
Fandoms: Undertale (Video Game), Half-Life (Video Games)
01 May 2025
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Adrian Shephard, an HECU Corporal shipped off to Black Mesa for 'cleanup duty', somehow manages to escape the hellish facility against all odds and, after being 'detained' by the ever-so elusive G-Man, is assigned a mission... to the UNDERGROUND! Accompanied by Chara Dreemurr, the first fallen human turned apparition, they venture through for one, very specific goal... but is that all there is to it?
In... time, all will be revealed.
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A bunch of oneshots related to my band au.
Not necessarily consecutive
Series
- Part 2 of The Band-its
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You, like so many others, have been thrown down Mt. Ebbot, the mountain rumored to be the entrance to Hell.
Trying to make it out alive, you befriend—and perhaps romance?—some extremely... prickly monsters. Despite their secrets and an asshole of a king, maybe you can build a life down there?
But that's only if these damn skeletons don't kill you first.
Series
- Part 3 of The Mary Sue-niverse
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'Good' and 'bad' are just words, and people... Are just people.
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OR:
A peek into the lives of a particular set of brothers, in a particular AU within the "world's end" multiverse.Series
- Part 3 of world's end
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Unfinished (occasionally dubiously-canon) snippets, deleted scenes, alt povs, pre- and post-canon junk, and some AUs within the universe of Gossip Merchant.
Series
- Part 3 of Gossip Merchant
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(Hiatus!) Patiencetale || A vision gone wrong. by solemn_solace
Fandoms: Undertale (Video Game)
09 Feb 2025
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Patiencetale is my Undertale, taking inspiration from both aus of Dusttale and Outertale. Still stuck underground, the monsters suddenly get gifted with finding books about the great outer space in the Waterfall trash dump. The books immediately fall into royal scientist, Dr.Gaster's hands for him to study and dissect before releasing them to general monster public. The monsters, thrilled to learn about such beautiful sights above the surface, begin creating any form of media they can around anything space related. The underground made what is seemingly a follow around the stars, looking to Gaster for knowledge about the things they now based their lives off of. Crystals in the ceilings of Waterfall and Hotland quickly were made into jewelry pieces. No one could walk an inch in the underground without seeing stars, artificial ones.
This au follows Sans, Dr.Gaster's son. A boy who is deemed so ill and fragile he is too be watched and not touched by a single soul, but his father of course. Gaster dreams of seeing the stars one day, after breaking the barrier, and he will do everything in his power to do so. Whether that means exploiting his son for pity, or stealing human souls to extract magic from.
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A Sans no le habría importado mucho ser confundido con su contraparte alterno, no, de hecho, Sans lo tomaría usualmente con gracia. Si… Bueno, eso no es algo que pueda aplicar a esta misma extraña situación en la que se metió “accidentalmente”.
Series
- Part 2 of ☆★Desplazamientos (forzados) en el multiverso ☆★
- Part 1 of Fic's de Glitches & Fallos
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So most of Sans and Papyrus' friends are dead, and Sans is trying to cope by denying everything. It doesn't matter, anyway. It's just gonna reset. You know what, why not sing about lying to both himself and Papyrus about their friends' deaths while waiting for a reset, huh?
(Skeletwins AU)
Series
- Part 2 of Skeletwins Lyrics
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Fruit of my Womb (Heart and Soul) by No_Skittlez_left_behind
Fandoms: Undertale (Video Game)
05 Jan 2025
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sans is fifteen, an up-and-coming boss monster, and widely considered one of the smartest kids in his generation. He gets good grades in his classes, when he bothers to show up. He helps his dad in the lab, triple checking equations, writing up simple code and sometimes even helping his dad and the engineering team overhaul huge sections of the barely-functioning brand new CORE. And on busy nights he worked the dish-pit at Grillin's restaurant for pocket change. But he's also a teenager, and as smart at teens may think they are, they're still prone to making decisions that they aren't ready to handle.
One night sans discovers something that will change his life forever, he doesn't have the strength to tell his dad about it and instead shoulders the burden himself.
How will sans deal with the consequences of his actions? How will his friends and family react when they inevitably find out? And most importantly, what is he going to do with a tiny baby skeleton?
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Papyrus knows about the resets, and so does Sans. But neither of them know that the other does. They spend all their time making sure that the other is never aware of the timelines or their knowledge of it, which leads to whacky shenanigans and catastrophic mental health issues.