Undertale (Video Game)

Your Lives Are My Game [SHORTS]

Your Lives Are My Game [SHORTS]

F/F
F/M
M/M
Multi
G
Updated
11.04.2025
Fandom
僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga) Undertale (Video Game)
Characters
Midoriya Izuku, Midoriya Izuku/Yaoyorozu Momo, Midoriya Izuku/Everyone, Midoriya Inko, Yaoyorozu Momo, Chara (Undertale), Frisk (Undertale), Clover (Undertale Yellow - Master Sword), Original Undertale Character(s)
Tags
Self-Indulgent Midoriya Izuku-centric Midoriya Izuku Has a Harem Overpowered Midoriya Izuku Overpowered Yaoyorozu Momo Wish Fulfillment Pretty much entirely lmao Idea dump kinda Midoriya Izuku and Yaoyorozu Momo are a Power Couple
A series of (now canon-ambigious instead of canon) shorts related to the "Your Lives Are My Game" story. Decided to separate this from that since it must've been annoying seeing that story at the top of almost every Izuku pairing tag and then some. H...
Partying after the Parting

Partying after the Parting

F/F
F/M
Multi
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Ceroba Ketsukane/Chujin Ketsukane (Undertale Yellow - Master Sword), Ceroba Ketsukane & Martlet & Starlo (Undertale Yellow - Master Sword), Ceroba Ketsukane & Martlet (Undertale Yellow - Master Sword), Ceroba Ketsukane/Martlet (Undertale Yellow - Master Sword), Ceroba Ketsukane (Undertale Yellow - Master Sword), Starlo (Undertale Yellow - Master Sword), Martlet (Undertale Yellow - Master Sword), Dina (Undertale Yellow - Master Sword), Axis (Undertale Yellow - Master Sword), Dalv (Undertale Yellow - Master Sword), Chujin Ketsukane (Undertale Yellow - Master Sword), Kanako Ketsukane (Undertale Yellow - Master Sword),
Tags
Friends to Lovers Fluff and Angst Post-Undertale Pacifist Route Past Alcohol Abuse/Alcoholism kinda offended feathered mask doesn't have more fics ngl everyone is doing better i think
It's been exactly four years since clover's sacrifice and the monsters have made a tradition to make a huge party at dina's saloon to conmemorate the human that changed their lives, but something interesting happens on this one as ceroba fights her c...
Multifandom Oneshot Book!!

Multifandom Oneshot Book!!

F/F
G
Updated
11.04.2025
Fandom
Arcane: League of Legends (Cartoon 2021) Hunter X Hunter Undertale (Video Game)
Characters
One (Battle For Dream Island), Basketball (Battle For Dream Island)
Tags
wlw Basketone Woman love Nonbianary? wlnb
The Discovery

The Discovery

F/F
F/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Original Undertale Character(s), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale)
Tags
Alternate Universe - Underfell (Undertale) Babybones (Undertale)
Little one shot for the Babybones universe! Alphys and Undyne make a discovery
Prequel tales of ancient gods

Prequel tales of ancient gods

F/F
F/M
M/M
Multi
G
Updated
11.04.2025
Fandom
Undertale (Video Game) Ancient Greek Religion & Lore
Characters
Hypersomnia - Relationship, Error x Dream x Ink, there aren't many others cause they are the only relationship when the world started out, she/her Dream - Character, she/her Ink - Character, Sirius (OC), Dreamtale Nightmare Sans (Undertale) - Character, Nim (Undertale - Dreamtale by Jokublog), Reaper Bird (Undertale)
Tags
One Shot One Shot Collection Alternate Universe - Gender Changes Feral gods? In this house? Absolutely Dreamtale Nightmare Sans (Undertale) Error Sans (Undertale) Dreamtale Sans | Dream (Undertale) Ecto-Genitalia (Undertale) Alternate Universe - Gods & Goddesses Feral Behavior gods fucking in the forest are likely Alternate Universe - Ancient Greek Religion & Lore Fusion
A collection of Ichorverse related one shots focusing mostly on the gods before and during the great war that i wrote for fun and because they consume my every moment and i wanna write them more. (Posted in the order i wrote them in, not fully cronol...
Across The Multichaos

Across The Multichaos

F/F
F/M
M/M
G
Updated
11.04.2025
Fandom
僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga) 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime) 原神 | Genshin Impact (Video Game)
Characters
Original Characters, Dabi | Todoroki Touya, Chara (Undertale), Kong | Aether (Genshin Impact), Ying | Lumine (Genshin Impact), Paimon (Genshin Impact), Roronoa Zoro, Monokuma (Dangan Ronpa), Kiana Kaslana | K-423, Stelle (Honkai: Star Rail), Anya Forger, Saiki Kusuo,
Tags
Chaos Multiverse
This is a work of fiction that involves many fandoms and their characters alongside my own characters.
Multi-Fandom FicRecs

Multi-Fandom FicRecs

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
11.04.2025
Fandom
Harry Potter - J. K. Rowling 原神 | Genshin Impact (Video Game) 崩坏：星穹铁道 | Honkai: Star Rail (Video Game)
Tags
Recommendations Content Warnings and Work Tags Will be Displayed in Chapters
A series of fanfiction recs ranging in the fandoms above!Come and leave your recs from any fandom in the comments!!
The Indie House (Rewritten)

The Indie House (Rewritten)

F/F
F/M
M/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game) Poppy Playtime (Video Game) Cuphead (Video Game)
Characters
CatNap/DogDay (Poppy Playtime), CatNap (Poppy Playtime), Cuphead (Cuphead), Mugman (Cuphead), Bendy (Bendy and the Ink Machine), Jevil/Spamton G. Spamton, Huggy Wuggy/Kissy Missy (Poppy Playtime), Kris/Ralsei (Deltarune), Freddy Fazbear, Monika (Doki Doki Literature Club!), Hat Kid (A Hat In Time), The Follower (123 Slaughter Me Street),
Tags
Original Character(s) Angst and Hurt/Comfort Self-Harm Chaos Religion AU Depressing Crossover Suicide This story gets CRAZY Brace yourself Why am I doing this?
I had an interesting thought in my head, and I asked myself, “What would happen if a bunch of indie game characters were dropped into the Dark World (from Deltarune)?”And so, I wrote this crazy story.
Over Hill and Under Hill

Over Hill and Under Hill

F/F
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Papyrus & Sans (Undertale), W. D. Gaster & Papyrus & Sans, Alphys & Sans (Undertale), Alphys & W. D. Gaster, Ashley/Brooke, Ashley & papyrus,
Tags
Fluff Angst Found Family Will add tags as I go do not know what im doing or how to tag this ashley and brooke will be in a qpr at some point might take a while lol also i wanna (and will) include the pines family from gravity falls but ill tag them when they show up have patience im a bit dumb gaster referred to as wings
An overtale Undertale AU thats a bit different, the main undertale cast (sans and the rest) live on the surface and frisk and chara live in the underground (and are also twins)story is from Ashley's pov (shes an oc) and Shift's pov (out of universe n...
Tibula

Tibula

F/F
G
Updated
11.04.2025
Fandom
Original Work Undertale (Video Game)
Characters
Original Female Character(s), Tibia x fibula, tibia x reader, Tibia, Fibula
Tags
Fluff Porn with Feelings Angst Slow Burn Porn With Plot Anal Sex Angst with a Happy Ending Hurt/Comfort Bondage Sexual Tension Sex Prostate Milking
Tibia x Fibula slow burn fic
Nice Cream Niceties

Nice Cream Niceties

F/F
M/M
Multi
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Nice Cream Vendor (Undertale)/Reader, Nice Cream Vendor (Undertale)
Tags
Fluff Other Additional Tags to Be Added Reader-Insert Meet-Cute Awkwardness Awkward Conversations Gender fluid reader Nice Cream (Undertale) Reader is not Frisk or Chara (Undertale) Autistic Characters
I don't interact with monsters... then again I don't interact with people in general really.It was happenstance that I stopped at the (n)ice cream vendor on my walk.(That's a version of the truth, but it's not like I can say that my social anxiety co...
Split-Personalities AU

Split-Personalities AU

F/F
F/M
M/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Original Undertale Character(s), Dreammare, nightdream, Dream/Nightmare - Relationship, Dreamtale Dream/Dreamtale Nightmare, Dream Sans, Nightmare Sans
Tags
#firsttimemakingafanfic DreamMare - Freeform the author is a delulu The Author Has Issues
He was hurting. But he refused to acknowledge it, for everyone’s sake…He was the guardian of positivity after all! He wasn’t supposed to feel negative emotions at all!So, he tucked everything they felt into a corner of their mind and left it at that....
A Guide To Getting Rid Of Skeleton Suitors

A Guide To Getting Rid Of Skeleton Suitors

F/F
F/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Reader, Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Papyrus (Undertale)/Reader
Tags
Unrequited Love Eventual Romance Reader-Insert Minor Original Character(s) Enemies to Lovers Post-War Original Character Death(s) Roommates Alternate Universe - Swapfell (Undertale) Swapfell Sans (Undertale) Swapfell Papyrus (Undertale) Reader is AFAB - Freeform
You were just starting over after a terrible beginning at life,"Everything is going to be great from now on!" You said. You forgot to knock on wood and apparently Murphys law heard you.....Two bone heads come knocking on your door wanting to reconnec...
UnderWatcher Part I

UnderWatcher Part I

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Frisk (Undertale)
Tags
Alternate Universe POV Alternating Alternate Universe - Undertale Multiverse | UTMV (Undertale) Alternate Universe - UnderWatcher (Undertale) Undertale Alternate Universes Reader Is Not Frisk (Undertale) Reader Is Not Chara (Undertale) They/Them Pronouns for Frisk (Undertale) Adult Themes
This is the story of UnderWatcher, an Undertale AU created by me, WylohWist. In part I, you'll follow the story alongside the character and learn about this world, its characters, its history, and its future. (Please note that tags will be updated al...
It's Not Too Late (Male Reader Edition)

It's Not Too Late (Male Reader Edition)

F/F
M/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Chara (Undertale), Frisk (Undertale), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Sans/You, Sans/Male Reader,
Tags
Slow Burn Friends to Lovers Humor PTSD lots of fluff male reader - Freeform And angst mentions of self harm Mentions of Suicide monster hate groups Reader is male You like kidnapping?
You haven't had an easy life. The mistakes you've made have carved literal scars into your mind and body. A precious life was lost because of you. But now you've moved to a new city, trying to leave all that behind you. You've got a promising new int...
Fŕįßk Jane đřēæmèr Potter

Fŕįßk Jane đřēæmèr Potter

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Original Characters, Harry Potter, Minerva McGonagall, Severus Snape, Ron Weasley, Hermione Granger, Ginny Weasley, Fred Weasley, George Weasley, Albus Dumbledore, Chara (Undertale), Frisk (Undertale),
Tags
Character Bashing Albus Dumbledore Bashing Manipulative Albus Dumbledore Female Frisk (Undertale) Harry Potter Has a Twin Harry Potter Has a Sibling Frisk doesn't like Dumbledore
Lily and James had three children their oldest Jake Potter, their hair, th middle child Harry Potter, the boy who lived and the youngest Frisk Jane Potter known to the Wizarding world as Jane Lily PotterThis story starts in Frisk's first year at hogw...
How to tell you?

How to tell you?

F/F
F/M
M/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Alphys/Undyne (Undertale), Sans (Undertale), Papyrus & Sans (Undertale), Sans/Sans (Undertale), Mettaton/Papyrus (Undertale), errorink(mentioned), kustard(mentioned), Skeleton(s) (Undertale)
Tags
Fluff and Humor Established Relationship idk how to tag fucking with the originals they think they going crazy
Just a tipical day, but something in the air.Sans just don't know how to tell something to his family.So he got some help.
Earth's Strange History: Timeline

Earth's Strange History: Timeline

G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Marvel Star Wars - All Media Types
The complete timeline of my main fic, Earth's Strange History.
Meet our brand new Sans Gaster toy!

Meet our brand new Sans Gaster toy!

F/F
F/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Sans (Undertale), Frisk/Sans (Undertale)
Tags
Toys Stuffed Toys Commercials Online Shopping
Congratulations! Sans Gaster is now in your possession! You can learn more about your product by following our manual.
PLEASE

PLEASE

F/F
F/M
M/M
Other
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Frisk (Undertale), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Papyrus & Sans (Undertale), Toriel (Undertale), Mettaton (Undertale),
Tags
Alternate Universe - College/University Español | Spanish Soulmates First Love Love at First Sight Homosexuality Heterosexuality reader is a baddie sans is in love so bad tee hee
Dentro del subsuelo habían reglas no escritas, reglas que no necesitaban ser gritadas o señaladas para que se siguieran.Pero en la superficie todo parecía tan complejo, hasta las relaciones humanas eran complejas. ¿Es que acaso no existía las almas g...