1 - 20 of 187 Works in Alternate Universe - Mafiafell (Undertale)
Navigation
Listing Works
-
I'm Never Gonna Know You Now, But I'm Gonna Love You Anyhow by sweet_bellyache
Fandoms: Undertale (Video Game)
10 Nov 2025
Tags
Summary
A decade ago, your quaint town fell prey to the greedy hands of violent gangsters, and life as you knew it went to shit. Your area became dangerous, depressing, terrifying, especially at night. All you have is the pizza place you inherited from your father. Your future seems bleak.
One fateful night, a monster walks into your establishment, not ten minutes before closing time. Something about that night… you wonder if holding onto a semblance of hope might be worth it this time.
-
Tags
Summary
Mafiafell take I had made.
Constant war meant the development of new methods of destruction. Hopes of catching everyone else off guard with a weapon they couldn’t combat or find a way around just long enough to stay on top until the newest shiniest thing made its way to the market. Mechanical enhancements, biological modification, higher powered weapons. Its a constant struggle for king of the hill, a never ending toppling and growing market with worse and worse.
-
Tags
Summary
Working at a bar wasn’t all that bad. Sure, sketchy people would show up, and sure, there have been some fights, but besides that, it wasn’t that hard for her to focus on her job. Of course, the only person who made Muffet’s shift bearable was Fell, who had become a regular.
This is an image roleplay format & podfic loosely inspired by Sooner or Later You're Gonna be Mine by Staringback ( A03).
So if you are a Frans shipper, I'm sorry, but adult Frisk will not be in roleplay. Muffet will be taking her place as Sans' love interest... DunkinDonut.
Please enjoy.
-
Whitecoat by bambibeee
Fandoms: Undertale (Video Game), Mafiafell - Fandom, Mafiatale - Fandom
18 Oct 2025
Tags
Summary
In a city where monsters rule and humans disappear, you keep your head down and your scalpel sharp. They call you Freya. The cartel’s private doctor. Human. Untouchable. Employed for reasons you can’t remember, protected by monsters you don’t trust. But memories never stay buried forever.
“there’s no basement, dollface,” Sans says.
But the ground is humming. And you’ve learned to stop trusting.
────୨ৎ────
-
Tags
Summary
The daughter of a politician and a successfully business man being kidnaped and held for ransom was something you only heard about in stories, rare true crime specials that didn't happen to regular people. Until it happened to you.
Now in the middle of a blind panic your father has purchased several Monsters to make sure it doesn't happen again, using what might have been shady business dealings to get special permissions for them. You never asked about how your dad had so much money, or how he was always able to pull so many strings, but maybe you really should have. -
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 - ??? -
Tags
Summary
It was all great. You had friends, family, a place to call home. Until the Human child fell and ruined everything. Now? There’s nothing left but a desolate Underground for you and your Husband to be reminded of the past.
That is until the ground breaks from under you and spits you and your husband into another universe entirely.
-
Tags
Summary
After years of being in the worst possible situation, your life was thrown in for a loop when the Fell brothers took you away and employed you as their maid.
Now, you have to adjust to a somewhat normal life. Well, as normal as it can get living with them.
-
Tags
Summary
What happens when everything changes? Everything is the same but it isn't.
An entity from the stars descends to earth and disguised themselves as human. They witness history in this new era of monsters and humans, while also dealing with the demons that dare dirty the earth with their presence.
What happens when you step into the battleground from one universe, only to win and come out into another parallel world, except you’re the protagonist?
You weren’t one for the spotlight. You loved your sister, even if she wasn’t one by blood. You only wished for her well-being and happiness. Except here… she’s gone. And now you have to take her place and stand under the limelight as you walked your path in her place - the protagonist.
————
I DON’T CONDONE MY WORKS TO BE TRANSLATED, REPOSTED AND/OR FED TO AI.
9/1/25 — thank you for 600+ hits!
Series
- Part 2 of Still As Stone AU
-
Tags
Summary
Rose is a singer and waitress at a bar called The Black Swan in Ebott City. Everything is normal until she sees an intriguing skeleton in the back of the bar during her performance. This is just the start of a very long story.
-
Tags
Summary
Hyunjin, a completely innocent 20 years old boy working night shift in a grocery store. He accidentally saw the Stray Kids mafia team kill his colleague. After that, his life turns 360°.
★
Chris, knows as Chan is the leader of the Stray Kids mafia team. He's very cold hearted and hates everyone except his teammates.
★
What happens when they kidnap Hyunjin because he saw everything he shouldn't?
-
ArcaneFell: Under His Protection by Witch_of_Ragnarok
Fandoms: Undertale (Video Game), Mafiafell - Fandom, ArcaneFell
30 Aug 2025
Tags
Summary
ArcaneFell is a Mafiafell fanfic set in the brutal, pre-industrial underworld of the 1860s. When Sheriff Marrow finds a wounded human slave in the snow, his quiet world of law and loyalty begins to fracture. He names her Garnet. She becomes his reason to question everything. Bound by silence and shaped by survival, their growing bond defies a world built on obedience and blood. As Garnet’s lost magic resurfaces, she becomes both weapon and witness to the dark games of Don Gaster. In ArcaneFell, protection is power—and love may be the deadliest risk of all.
Series
- Part 2 of ArcaneFell
-
My hummingbird (W.D.Gaster/Reader) by OMGwhyamIadegenerate
Fandoms: Undertale (Video Game)
27 Aug 2025
Tags
Summary
"Ladies and gentlemen, please welcome our queen of the opera, Y/N!"
The noise, the magic, everything making your heart fill with emotion and your body shake with excitement. This is your life.
About 10 years ago, the monsters from the Underground were freed. Unfortunately, the hope of pace was quickly buried under the shadows of the mafia. The human mafia king and the monster mafia king, king Asgore, formed an alliance, covering the shadows with eyes, ears, and fear.
You are a 28 years old opera singer, the best at your job. This is your dream and love, music. Since a child, you fought your way up, alone. But one night, you feel another type of magic, one you never felt before. Your new bodyguards, the skeleton family, intrigued you with their mystery, especially the man named Gaster.
This time, you won't sing a story nor play a role, this time, you would truly feel the power of the most dangerous magic, love. -
Tags
Summary
Edge took his jail time as the chance to get out of the "family business", but being a felon offers surprisingly few work options. Luckily he stumbles across a restaurant in desperate need of his cooking skills, and a beautiful married couple that may offer more than just job security, in the long run.
Series
- Part 37 of F/P/S-Cest
-
Tags
Summary
Stretch has a boyfriend, and what a boyfriend he is! Handsome, confident, diligent, successful… Stretch isn't quite sure exactly what he does for a living, but Edge is loaded! Big house, private drivers, local restaurants keep a private table for him, and his brother's a doctor! Who would have thought that getting hit by a rich monster's car one day would be the first step in finding the relationship of Stretch's dreams? The only downside is that Blue, Stretch's brother, doesn't like him. Oh, well. He'll come around, as soon as he gets that silly idea about Edge being some kind of crime lord out of his head.
— or —
Stretch is in a relationship with a mob boss (Edge) and despite ludicrous amounts of evidence, he has somehow failed to notice. Red is a mob doctor and has been flirting with Intent this entire time. Blue is the only normal person in the universe.
-
Tags
Summary
You needed a new scenery, a fresh start to really learn to love yourself, and the universe decided to throw you in a different world, and do it subtlety, like it was so prank on you.
A universe where monsters from undertale exist and now you just have to just– live with it?! It was strange and what's stranger–Is the fact you now have soulmates, some of whom who hates or dislike you.
Great~.
-
Tags
Summary
(Female black insert. This is also based in the 1920's so there will be aspects of racism and discrimination.)
You were one of the more notorious mafia families in your area, when suddenly you are attacked by three monsters. They take everything from you, your home, your family, and your power. Forced to retreat to a smaller town with the remnants of your gang you slowly work toward revenge. During this time you run into your one of your attackers, Sans. He takes a liking to you, it makes your blood boil. He refuses to kill you even though you were supposed to die in the attack. Why is this? And what will come of the dynamic with his power over you?
-
Дом по соседству by White_Raven63 for BattleMaiden13
Fandoms: Undertale (Video Game), Underfell - Fandom, Underswap - Fandom, Swapfell - Fandom, Mafiatale - Fandom, Mafiafell - Fandom, Mafiaswap - Fandom
08 Aug 2025
Tags
Summary
В первый раз, когда ты встречаешь монстров, тебе удается столкнуться с четырьмя из них и буквально столкнуться с одним из этих четырех. Теперь они, по-видимому, переезжают по соседству со своими родственниками, и ты, похоже, уже не можешь представить себе жизнь без них. С другой стороны, они рассказывают ужасные шутки и обладают бесконечным количеством энергии. Так что же может пойти не так.
Часть 1) Главы 1-138
Часть 2) Главы 139 - ??? -
Tags
Summary
Growing up in the Omega Timeline has left you with little to no life experience with the real worlds out there, however, one thing you did know. Is that you found the idea of multiple universes both charming and disturbing.
So, one day, with copies of yourself, you left the Omega Timeline and encountered Error, a self-proclaimed destroyer.
Thus, your fate was sealed and life went on from there, except now you were far from home…
All you and Error wanted was to live in peace, but that just seems like a hopeless wish now.