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Vermifuge by aeraecura
Freed from the Fresh parasite's control, Sans finds himself in an Underground that isn't quite his own. He takes what's been given to him as best he can. (Or: a slightly gentler alternate ending for a character with a disturbing fate, as written by a canon purist who feels no love for AU content. With apologies to Hiroyuki Owaku.)
Rated: T - English - Angst/Family - Chapters: 9 - Words: 52,197 - Favs: 8 - Follows: 4 - Updated: 4/10 - Published: 4/1/2021 - Papyrus, Sans, Undyne, Alphys
Fate fgod Fanfiction (no selfcestsanscest) by YourOfficialBasement
Only trusted ones were told about his job; a job that was forced upon him with rules that prevented him from simply telling the whole multiverse his role. After an error, he and many others had been transported to a different world; a world where alternate versions of them were either teachers, or just high school students. The fgod concept belongs to Harrish6. NAJ to rouge.
Rated: T - English - Hurt/Comfort - Chapters: 1 - Words: 371 - Published: 4/9
Flowey, god of the underground by UnDeterminedSoul reviews
Unwanted consequence of an experiment went wrong, prince Asriel Dreemurr finds himself reborn as a soulless flower unable to feel love or compassion. When confronted to death, he discovers himself a new power : Determination. The resolve to change fate. With the ability to travel through time and erase the consequences of his actions, the prince now held the power to play god.
Rated: T - English - Hurt/Comfort/Angst - Chapters: 5 - Words: 14,432 - Reviews: 2 - Favs: 2 - Follows: 2 - Updated: 4/9 - Published: 3/12 - Alphys, Asgore D., Flowey
I'm a Member of the PTA by Yours The Author reviews
I'm a member of the PTA/ I'm a member of the PTA/ There with the Frisk in the evening/ Fighting the s'burban moms (s'burban moms)/ Come on, dear teachers/ Come on, parents/ Late for the meeting and you'll miss the verbal wrecks/ Cover your kids ears because there is a show today/ Become a member of the PTA!
Rated: K+ - English - Parody/Family - Chapters: 41 - Words: 55,532 - Reviews: 144 - Favs: 110 - Follows: 119 - Updated: 4/8 - Published: 4/2/2016
Undertale Fallen Determination: Book 2 by Cobalt Gemini reviews
After Chara is freed from the Void, reunited with her friend, Gaster, and gone through a Reset of time, she must now help guide young Frisk through the Underground, showing her to get by without harming anyone. (Female Adult Chara, Female Frisk)
Rated: T - English - Family/Hurt/Comfort - Chapters: 21 - Words: 69,328 - Reviews: 6 - Favs: 24 - Follows: 25 - Updated: 4/7 - Published: 4/23/2020 - Frisk, Chara, Gaster
Enemy by evilescapist reviews
Meeting your soulmate inside a coffee shop is supposed to be romantic. But, Sans doesn't like humans and really doesn't want anything to do with you. Soulmate AU in which Sans tries to prevent himself from falling in love, and fails miserably. Sans x Reader. Reader is female.
Rated: M - English - Romance/Drama - Chapters: 1 - Words: 2,187 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 4/7 - [Sans, OC] Papyrus
Multiverses by Hermes187 reviews
Each multiverse has its respective heroes and villains who carry the responsibility of maintaining a balance. But for those who fail in this duty, there is a place to fight for a new chance at life. Or fail again and meet a fate worse than death. Welcome to Zero Infinity.
Rated: M - English - Fantasy - Chapters: 19 - Words: 51,150 - Reviews: 2 - Follows: 2 - Updated: 4/6 - Published: 8/3/2021 - Papyrus, Sans, Chara
DoubleTime by TiredWhiteMayge reviews
Twenty-one iterations of W.D. Gaster gambled on plucking a human from beyond their reality to stop a vicious cycle of genocide, and changed the multiverse forever. In a scrambled timeline, away from the grand tragedy of The Angel & The Anarchist, a young woman awakens on a bed of flowers in her pajamas...
Rated: T - English - Adventure/Friendship - Chapters: 7 - Words: 22,537 - Reviews: 20 - Favs: 15 - Follows: 20 - Updated: 4/6 - Published: 3/16/2021 - Frisk, OC, Chara, Gaster
Undying will by Electronicday
This fic is inspired by inverted fate check it out here https:/invertedfate
Rated: T - English - Tragedy/Drama - Chapters: 1 - Words: 487 - Published: 4/6
Bad Influence by Cthulhu555 reviews
A humorous journey where Chara speaks to Frisk in their head, trying to push them to kill, but the pacifist in Frisk is far too strong, and they simply go through the events of the Pacifist and True Pacifist route having pleasant conversation and becoming friends with the psychopath in their head, trying to bring them around to their way of thinking. Chara in italics to help flow.
Rated: T - English - Humor - Chapters: 20 - Words: 53,430 - Reviews: 18 - Favs: 58 - Follows: 60 - Updated: 4/5 - Published: 5/1/2016 - Frisk, Chara
My Redemption by LeahLovesPotterUndertale reviews
After an abandoned genocide route and an abnormally placed TRUE RESET button, I have now respawned on the field of buttercups with no way to do another genocide route. No weapons, and the other characters that can remember timelines know nothing of it. Can I redeem myself in the underground? Let's find out. Sans X OC Rated T for that. PS: I suck at summaries.
Rated: T - English - Adventure/Hurt/Comfort - Chapters: 12 - Words: 11,122 - Reviews: 1 - Favs: 4 - Follows: 7 - Updated: 4/4 - Published: 12/2/2021 - Papyrus, Sans, Undyne, Flowey
Everything to Me by AngelxYasutora
A G!SansxListener/Reader situation that I was inspired to write after watching a bunch of videos on youtube from someone who reads similar fanfics for her channel Sorry if it's so long guys
Rated: T - English - Family/Romance - Chapters: 1 - Words: 9,412 - Published: 4/3 - Sans
What is best for humankind by Theta and Koscheii reviews
At the end of the war, monsters don't have the choice : they have to join Mont Ebott for survive an other day. Sans and Papyrus, forced to run away after the attack of their village, are delivered to the horror of the war without any help and this one objective. But as sons of the royal scientist, W.D Gaster, they are an easy target. Both of them start a dangerous journey.
Rated: T - English - Adventure/Drama - Chapters: 16 - Words: 36,896 - Reviews: 2 - Favs: 5 - Follows: 5 - Updated: 4/3 - Published: 4/6/2021 - Papyrus, Sans, Undyne, Toriel
The meeting by WillooODST
One shot. Intended for those who have read FEAR the Wretched soul and/or KILL the Traitorous soul. The year is 2037. After years of King Asgore being manipulated by humanity, forced to hand over monster kinds most elite warriors for the promise that humanity will set monsters free...humanity is ready to deliver on their promise.
Rated: M - English - Fantasy/Drama - Chapters: 1 - Words: 2,957 - Published: 4/3 - Asgore D., OC, Undyne - Complete
KILL the traitorous soul by WillooODST
(soft sequel to FEAR the Wretched soul more info in A/N) The year is 2035, humanity has forced King Asgore to give up his most elite warriors to fight for the humans with the promise that monsterkind would go free. One of these warriors has rebelled and fled into the snowdin forest. An operation to kill or capture him has been ordered by the humans...
Rated: M - English - Angst/Adventure - Chapters: 1 - Words: 25,950 - Published: 4/3 - OC - Complete
Ghastly Green by Weeb.38
Had I died? How did I die? Why don't I remember anything? I'm a ghost? Why am I holding a knife? Why can only three people see me? And why is one of them a flower? (Another one of my dumb stories...)
Rated: T - English - Humor/Hurt/Comfort - Chapters: 1 - Words: 1,344 - Favs: 1 - Follows: 2 - Published: 4/2 - OC, Sans, Flowey, Frisk
Change of Heart by PokeDopes
Frisk has decimated nearly the entire Underground. With the SAVE and LOAD powers his Determination grants, the strongest of monsters have fallen to him. All hope appears to have been lost, but one monster believes deep-down that he can change. Will their words be enough to stop his genocide? One-shot.
Rated: T - English - Chapters: 1 - Words: 5,958 - Favs: 2 - Follows: 2 - Published: 4/2 - Frisk, Sans - Complete
Sans is trying (working title) by Auragirl1000 reviews
An Undertale story that came from me venting, and now I'm sharing it for some reason! This sort of takes place after the game, where Sans finally breaks. Tw: self harm, depression, and suicide themes. I told you it was venting. Stories like this have always helped me get through things, hopefully mine can do the same. Feedback would be great!
Rated: T - English - Angst/Hurt/Comfort - Chapters: 18 - Words: 12,102 - Reviews: 3 - Favs: 14 - Follows: 17 - Updated: 4/2 - Published: 8/1/2021 - Papyrus, Sans, Undyne, Alphys
Googly Eyed by Junkiia
The monsters have a prank set up for Frisk...
Rated: K - English - Humor - Chapters: 1 - Words: 458 - Published: 4/1 - Frisk, Papyrus, Sans, Toriel - Complete
Struggles we have had and will have by Fish-le-Patriarche
Following the end of the war between human and monsters, Asgore, the King of all monsters, sealed the humans under the mountain with the help of seven human souls. Centuries, perhaps even millenia later, the humans, boiling to the brim with anger, complete and utter resentement for their captors, sent up their only chance for their freedom and salvation through the barrier.
Rated: T - English - Adventure/Friendship - Chapters: 11 - Words: 29,709 - Favs: 3 - Follows: 7 - Updated: 3/31 - Published: 1/25/2020 - Frisk, Asriel, OC, Undyne
One word, why?: book 1 by Mlzzramd0n
A sixteen-year-old girl is kidnapped and has her mind erased. With the help of her friend Frisk, she gets to explore the world, Undertale. Undertale by Toby Fox.
Rated: K - English - Adventure/Friendship - Chapters: 5 - Words: 4,752 - Favs: 3 - Follows: 3 - Updated: 3/31 - Published: 5/6/2021 - Frisk, OC, Papyrus, Sans
Magnificent Plan by PokeDopes reviews
Frisk promised to free monster kind from the Underground but died at Asgore's hands. Several years later, the Underground leads another human into its dark depths, only this time, things are much different, and a misunderstood murdering of monster kind leads to a RESET that brings two timelines together in a way that was never meant to be. AU/AT story.
Rated: T - English - Adventure/Fantasy - Chapters: 28 - Words: 148,474 - Reviews: 19 - Favs: 22 - Follows: 25 - Updated: 3/30 - Published: 4/23/2021 - OC, Sans, Chara, Flowey
Like A Father In More Ways Than One by GoldGuardian2418 reviews
Undyne reveals that she sees Asgore as a father figure, one she's grateful to have. Done as a request for The gay geisha. :)
Rated: T - English - Family/Hurt/Comfort - Chapters: 1 - Words: 1,889 - Reviews: 2 - Favs: 7 - Follows: 2 - Published: 3/28 - Frisk, Chara, Undyne, Asgore D. - Complete
Toriel's Weight Gain by Cake Springs
Set ten years after the events of the game, Toriel finds herself gaining a lot of weight after trying Devil's Delectables. With time, she learns to like getting fat. Obviously contains spoilers for the game. NSFW: Minors, DNI.
Rated: M - English - Humor - Chapters: 5 - Words: 9,003 - Favs: 1 - Follows: 1 - Published: 3/28 - Undyne, Toriel
VOXISTALE: Season 1 by CoMok Corp reviews
Once upon a time… A human fell underground. Beneath the surface, they made friends. Made enemies. Made mistakes. Made things right. After a long time, the human decided to stay, calling the underground home. The monsters, her family. One day, the underground was destroyed, but the monsters were able to escape, thanks to the human. For years, they have lived on the surface.
Rated: T - English - Drama/Humor - Chapters: 22 - Words: 343,999 - Reviews: 6 - Favs: 12 - Follows: 16 - Updated: 3/26 - Published: 8/19/2020 - Frisk, Sans, Undyne, Asgore D. - Complete
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