1 - 20 of 4,551 Bookmarked Items in Alternate Universe - Underfell (Undertale)
Navigation
List of Bookmarks
-
Tags
Summary
While working the closing shift at Maximart, you were taking the trash outback to the dumpster. Once you opened the lid, you saw a nugget box begin to move. Being the genius you are you decide to poke it with a stick.
-
Bookmark Tags:
-
Tags
Summary
You find a couple of skeletons in the alley behind your apartment.
- Language:
- English
- Words:
- 4,162
- Chapters:
- 1/1
- Collections:
- 1
- Comments:
- 73
- Kudos:
- 1,288
- Bookmarks:
- 154
- Hits:
- 9,314
-
Bookmark Tags:
-
Tags
Summary
She shouldn't have left the house. She knew she shouldn't have left the house but she still did. The sirens went off and now the only place she can hide in the bathroom at Ebbot Park.
How long can she keep the monsters at bay for? And worse...she's not even sure they want to eat her anymore. So why are they still here?
- Language:
- English
- Words:
- 67,081
- Chapters:
- 13/?
- Comments:
- 556
- Kudos:
- 1,133
- Bookmarks:
- 276
- Hits:
- 28,614
-
Bookmark Tags:
-
Tags
Summary
You never expected much from a speed dating night.
Three minutes at a time, a blur of strangers, and nothing worth remembering… until him.A sharp smile, a voice like gravel, an aura that drags her closer even as every instinct tells her to run. He’s the kind of danger you don’t walk away from untouched... the kind that leaves a mark.
This is what happens when opposites collide, and neither of them is willing to back down.
-
The House Next Door by BattleMaiden13
Fandoms: Undertale (Video Game), Underfell - Fandom, Underswap - Fandom, Swapfell - Fandom, Mafiatale - Fandom, Mafiafell - Fandom, Mafiaswap - Fandom
28 Sep 2025
Tags
Summary
The first time you met monsters you manage to run into four of them and literally run into one of those four. Now they are apparently moving in next door with their siblings and you can't seem to imagine a life without monsters. On the plus side they tell horrible jokes and have endless amounts of energy. So what could possibly go wrong.
Part 1) Chapters 1-138
Part 2) Chapters 139 - ???- Language:
- English
- Words:
- 950,397
- Chapters:
- 201/?
- Comments:
- 5,592
- Kudos:
- 7,802
- Bookmarks:
- 1,124
- Hits:
- 381,760
-
Bookmark Tags:
Bookmark Collections:
Bookmark Notes:
Incredible fanfckin tastic,
Reread this and make notes of all the puns
They must be memorised, and committed to heartAlso has given you slogan for life,
"I HAVE CLASS, HE HAS MENTAL DAMAGE” ,
Also
"Corporate barbie","The rabble? No, their more like cousins or neighbors who get mad at you for chasing away the milk man”
“Why would you chase away the milk man? They bring you your milk”“He was trying to seduce my son” Don W huffed",
,"why the fuck were you in a wall?" ,“"Don’t you own a dishwasher?” you asked
“hey! the dishwasher has a name!” Money chimed in “it’s vi and you should respect that” He added ","HAMILTON, HE’S A FIGURE WHO MADE SPEECHES” ,
“Ooo yay I was a sacrifice”The most real summary ever
Chapter 197: Everything's fine
Summary:
It's not",Reread
It forever -
Bookmark Tags:
Bookmark Notes:
201
-
Crossing the Pick-Up Lines by Kamari333 for Skullcrysto, Acoustic_Meatus
Fandoms: Undertale (Video Game)
27 Jul 2025
Tags
Summary
An Underfell Sans is finally adjusting to surface life when a slutty alternate reality clone steals his drink.
How did this turn into a date?
- Language:
- English
- Words:
- 5,107
- Chapters:
- 1/1
- Collections:
- 2
- Comments:
- 27
- Kudos:
- 28
- Bookmarks:
- 6
- Hits:
- 138
-
Bookmark Notes:
A Red/Dust (Rust) fic! Had the pleasure of beta'ing this one for Big Bone 2025. The best kind of meet cute you could imagine for these bois.
-
Buy me and keep me (Underfell Sans x Reader) by SableSapphire
Fandoms: Undertale (Video Game)
04 Dec 2016
Tags
Summary
You lived a pretty normal life. You worked, you ate, you slept, and you get kidnapped to be sold to a very... interesting crowd.
-
Tags
Summary
In which your teacher decides to assign a social experiment project and lets you do whatever you want as long as you dontc harm anyone. You decide a Confession booth would be nice and see how many people and Monsters add confessions into the jar, whether they be sad, happy, crude, or awkward, you would happily accept them all.
So, you happily set up the booth with a few sharpies, notecards, a jar, sign, camera, and the not, 'Leave a Confession. You came back after your class and low and behold your confession booth was a success.
What you couldn't expect was that later that night while reading and reviewing the footage of the day you would catch a specifical skeleton acquaintance leaving a confession that would whole heartedly screw your night up. And get his family involved because who doesn't like having a gaggle of skeletons breathing down their neck.
-
Bookmark Notes:
4
-
Bookmark Notes:
chap 4
-
-
Tags
Summary
"so how did you two meet?" Sans, the laid-back leader of the skelebros group asked, his grin relaxed as he leaned over the kitchen table and sipped on his morning coffee.
"Oh, uh..." You rubbed your chin and tried to play it cool. "Well, it was late last night, and I thought I was looking for a dead body in the abandoned woods, so you can imagine my surprise when I found out he wasn't my guy."
"And then I punched her," Stretch replied, handing you a plate full of buttery pancakes.
"Yeah," you hummed, oblivious to the sudden silence around you. "In the face, too."
Tldr: that time stretch brings home a mage and doesn't realize it
- Language:
- English
- Words:
- 67,228
- Chapters:
- 31/?
- Comments:
- 611
- Kudos:
- 2,064
- Bookmarks:
- 484
- Hits:
- 44,081
-
Bookmark Notes:
31
-
Bookmark Notes:
chap 31
-
Tags
Summary
It has always been your dream to rise in life, even though many said it was impossible for someone of your class. But something your soul truly longed for was a soulmate. Anyone who carries a heavy burden wishes for another soul to be their anchor, their motivation. However, it seems you weren’t born to have someone by your side forever.
And now just because they’ve now become your soulmates doesn’t mean they’ll take away everything you’ve worked so hard to achieve.
-
Bookmark Collections:
-
Crawling Back To You by JayBird421, LoveBird (JayBird421)
Fandom: Underfell - Fandom, Undertale (Video Game)
06 Jul 2025
- Words:
- 16,565
- Works:
- 1
- Bookmarks:
- 1
-
Tags
Summary
Papyrus really needs cooking lessons. So Sans finds a chef to teach him.
-
Bookmark Notes:
Wanna see if I can amass a collection of awesome x reader or x oc fics for every soul trait. Currently got Kindness, Integrity and now Perseverance. 3 outta 7 ain’t bad so far. I’m biased towards perseverance tho cause it’s my favorite, glad to see em get some rep lol
-
Tags
Summary
You're an engineer who works for Ebott's best research facility in one of the labs; your lifelong dream after finding a journal on Mount Ebott when you were a kid. When you aren't in the lab being smart, you're gathering materials at the abandoned doll factory for the machine you're trying to build.
But one night, you meet a skeleton at the factory. Naturally, you lie about why you're there and say you're there to hunt ghosts. You befriend him and try to find a way to gather the materials while keeping up with that lie. But those lies catch up to you when you start to meet all the other skeletons.
Edit: As of Chapter 29, all chapters have been edited and fixed slightly!
- Language:
- English
- Words:
- 136,382
- Chapters:
- 52/?
- Comments:
- 1,018
- Kudos:
- 1,666
- Bookmarks:
- 359
- Hits:
- 47,239
-
Bookmark Notes:
27
-
Bookmark Notes:
52
-
Bookmark Notes:
Last chap 50
-
Tags
Summary
You are stuck in endless loops of working from home and scraping together other working from home side projects to help your boyfriend pursue his dreams. Being a rockstar. When he brings home a couple of bittys saying they're for you when he originally wanted to use them for his tours... you begin to see his true colors... also these bittys are scared and he isn't helping. Once again everything depends on you caring.
-
Tags
Summary
You watch them suggest names and argue with each other as you stand there dutifully like a newly-adopted dog. Rus sidles up close to you and looms over you like a hanging specter. His smile does not look friendly.
“How about..Snowy,” He suggests, his grin widening at the twitching grimace on your face.
How to survive a blizzard and nonconsensual teleportation to a dilapidated sci-fi basement.
- Language:
- English
- Words:
- 200,655
- Chapters:
- 11/?
- Comments:
- 301
- Kudos:
- 946
- Bookmarks:
- 257
- Hits:
- 21,642
-
Bookmark Tags:
-
Bookmark Notes:
R: 4.5 O: 11
Llr: Now shrouded in darkness -
Bookmark Notes:
💙💙💙🔁 Прекрасно! Персонаж хорошо прописан.
-
Bookmark Tags:
Bookmark Notes:
This story is peak, it's not finished yet but I've already read all the available episodes, it's a work of art. Made me cry twenty times and counting.
-
Tags
Summary
"I could smell ya from a block away. This is going to happen and it’s going to happen tonight. Ya can fight me, kick, scream, and tell me “no” all ya want if it will ease ya conscious.
Ya can rest easy knowin’ that ya didn’t technically cheat on your husband because I wouldn’t take no for an answer. Call it a gift for your wounded pride.
But I’m still gonna fuck ya. And you’re gonna cum for me."-
Bookmark Notes:
Ch 10
-
Tags
Summary
You meet up with a seemingly nice lady to discuss a roommate deal, though it doesn't seem to be going well. Considering one of her boyfriends suddenly just broke your arm.
Well, considering you met a much nicer pair of skeletons, you probably lucked out by not agreeing with her.
Series
- Part 1 of Matter of Luck
-
Bookmark Notes:
FINALLY! One where Reads is not a dumbass
-
Let me leave this here, while I'm gone by 8picklesinatrechcoat
Fandoms: Undertale (Video Game)
07 Apr 2025
Tags
Summary
Red is suppsed to leave for Bro-Night, but before he leaves, he has a suprise for you.
-
Tags
Summary
It’s late at night and you can’t seem to sleep unlike your boyfriend Sans. Damn, if only you could do something to preoccupy yourself…
-
Tags
Summary
You and your fuck buddy's relationship
-
Bookmark Notes:
13