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Sanctuary of Stardust by Sheii Bae reviews
Born into a life of cruel subjugation and confinement, a young child discovers that a different kind of prison might just become her safe haven. But nothing is ever that simple. With a deadline looming and troubles starting to pile up, a new friend with a lazy grin could be just what she needs right now. Multiple AU's. Slow burn. Female Frisk. Contains OC's. Eventual SansxFrisk
Rated: T - English - Hurt/Comfort/Family - Chapters: 85 - Words: 226,460 - Reviews: 409 - Favs: 85 - Follows: 93 - Updated: 10m - Published: 2/20/2021 - Frisk, OC, Papyrus, Sans
3rd House from the Right by Salzab
A household full of skeletons are competing over the attentions of one love. This isnt that house though. Unknown to the group secretively wrestling with their unpredictable love lives and universe-meddling machine, another house a few doors down has been gifted with its own skeleton posse clamoring for the attentions of their own little lady. A little old lady by the name of Mabel
Rated: K+ - English - Adventure/Humor - Chapters: 1 - Words: 4,642 - Published: 10h - OC, Papyrus, Sans
Flapper Florist (Mafiatale) by Michkate reviews
"El jugador" ha muerto... Y ahora todos quieren JUGAR. En la peligrosa Ebott City, radica una constante inconformidad por habitar monstruos y humanos en un mismo lugar., desatándose conflictos delictivos que atentan con la vida de los habitantes. Sin importarle las advertencias de su madre, Frisk decide ir a la ciudad y tener su florería junto con su compañero y mejor amigo Flowey
Rated: M - Spanish - Crime/Romance - Chapters: 100 - Words: 886,198 - Reviews: 164 - Favs: 76 - Follows: 73 - Updated: 18h - Published: 2/10/2017 - Frisk, Papyrus, Sans, Gaster
Twintale: Twisted Destiny by Shadow50056
In a last ditch attempt to escape, Frisk, alongside her twin brother Harley, and their younger sister, run up MT Ebott and leap into the Underground. What they find from there is horrors untold, as the Twin's Tale unravels to become even darker than before. F!Frisk F!Chara M!OC F!OC. Genocide Route First, Original story after Pacifist, No Marty Sue, M for Violence
Rated: M - English - Adventure/Angst - Chapters: 1 - Words: 1,935 - Published: 12/17 - Frisk, OC, Sans, Chara
Underground Spirits by Halloween Witch reviews
What would you rather see? A skeleton and a human talking about magic? A king thinking over his decision on if he should let humans live underground? A flower who's hellbent on killing everyone and everything? Or perhaps a young aspiring guard working their patrols diligently. The side stories of their lives, chosen by our readers, reside here. Sequel to Two Worlds, Two Souls.
Rated: T - English - Adventure/Romance - Chapters: 13 - Words: 43,202 - Reviews: 54 - Favs: 18 - Follows: 16 - Updated: 12/17 - Published: 9/24 - [Sans, OC] Frisk, Papyrus
TwinTale - The Story of the Eighth and Ninth Human by Shadow50056 reviews
In a last ditch attempt to escape, Frisk, alongside her twin brother Harley, run up MT Ebott and leap into the Underground. What they find is not what they expect. Read as truths are revealed, enemies become friends, and the true threat to the Underground comes to light... F!Frisk F!Chara M!OC. Genocide Route First, Original story after Pacifist, No Marty Sue, M for Violence
Rated: M - English - Adventure/Supernatural - Chapters: 68 - Words: 184,828 - Reviews: 77 - Favs: 79 - Follows: 93 - Updated: 12/17 - Published: 7/18/2017 - Frisk, OC, Sans, Chara
Fallen Humans by Shadow8Phantom
After sacrificing the souls to destroy the barrier and give everyone a happy ending, Asriel stayed behind in the Underground. He feared that, without a soul, he would hurt everyone as Flowey. But when a new human falls into the Underground he decides to help her out. And during their travels the duo have interesting encounters and discoveries in the now empty(?) Underground.
Rated: T - English - Adventure/Friendship - Chapters: 5 - Words: 11,135 - Favs: 2 - Follows: 3 - Updated: 12/17 - Published: 11/19 - OC, Flowey, Orange Soul, Blue Soul
LOVETALE - Saga of the Underground by Myu98 reviews
Frisk has Reset hundreds of times while searching for an ending that is just out of reach. When a run ends differently than any other, Frisk sees a chance to find the ending they truly desire and fulfill a promise they made long ago.
Rated: T - English - Fantasy/Family - Chapters: 14 - Words: 69,069 - Reviews: 52 - Favs: 28 - Follows: 30 - Updated: 12/15 - Published: 9/16 - Frisk, Toriel, Asgore D.
DoubleTale: Rewritten by XWolf26 reviews
What if two humans were in the Underground at once? What if one human was DETERMINED to stop the other? What if they could both SAVE? What happens when an Unstoppable Force meets an Immovable Object? When a certain scientist pulls enough of himself together, he finally finds a way to stop the destruction of his world. (Undertale AU. Rewrite of DT.)
Rated: T - English - Adventure/Angst - Chapters: 96 - Words: 1,091,779 - Reviews: 1438 - Favs: 360 - Follows: 353 - Updated: 12/15 - Published: 12/28/2018 - OC, Chara, Monster Kid, Gaster
A Red Butterfly amongst Skeletons by lei14cresent
A woman trying to escape a fate of death and ended up falling through a hole in Mount ebott.Wary and Anxious of her situation in the underground,She must find a way to survive and leave.But...why were these monsters so gentle and nice?friendly?and why the hell did she find herself being too attached to one punny skeletons with hundreds of different versions of himself?
Rated: T - English - Romance/Angst - Chapters: 1 - Words: 915 - Updated: 12/15 - Published: 12/14
Undertale Before And After Book 1 by Tc the writer
Chara has fallen into the Underground and Gaster has found a way out of the Underground and expects The King and Queen to do what it takes to leave but he does not expect what The King and Queen will really do nor does he know The Human's arrival. Come and experience how Chara grows into their new home and how Gaster will try to ruin it. (Rated K plus for now may change to Teen.)
Rated: K+ - English - Fantasy/Tragedy - Chapters: 6 - Words: 17,478 - Updated: 12/14 - Published: 11/27 - Asriel, Chara, Toriel, Asgore D.
The Reply by Lacywigs reviews
Looking for closure after finishing the game you write a letter to the characters. You never expected a reply.
Rated: K+ - English - Chapters: 15 - Words: 19,978 - Reviews: 151 - Favs: 141 - Follows: 183 - Updated: 12/14 - Published: 3/27/2016 - Sans
Glitchtale: The Black Beast by TheEclipsedOne
"History books never tell the full story..." - Bete Noire
Rated: T - English - Fantasy/Adventure - Chapters: 1 - Words: 282 - Published: 12/13 - Frisk, Asriel, OC, Gaster
Yet Another Charisk Tale by KontonNoKaze
He wanted to SAVE her, so he gave up his SOUL. She never expected to be SAVEd, to be LOVEd, to be alive. Yet, there looms another calamity in the Underground One none expected to rise again from the battlefield. Charisk Tales - Part II of IV
Rated: M - English - Angst/Romance - Chapters: 11 - Words: 16,956 - Favs: 1 - Follows: 1 - Updated: 12/13 - Published: 11/19 - Frisk, Chara
Human amalgamate by UnDeterminedSoul reviews
Two essences in one body, it was never meant to last. Two weeks after monsters' freedom, the unlikely cohabitation between Frisk and Chara within one body starts breaking down. Frisk's body pays the price while both of their consciousnesses slowly start blending together. As they become a kind of human amalgamate, the two begin losing themselves more and more with each passing day.
Rated: T - English - Angst/Tragedy - Chapters: 7 - Words: 21,628 - Reviews: 2 - Favs: 11 - Follows: 18 - Updated: 12/11 - Published: 8/21 - Frisk, Chara
Mal Ware by jumbochamploonrules
Malory Wares is a massive Undertale fan, to the point she asked for Toby's permission to make and program a fan project of the fabled Hard Mode of Undertale. But when she uploads it, she is suddenly transported to the Underground, but in real life and no 8-bit graphics! But when she learns she has a soul filled with intelligence and magic, she must use them to go back home. Rated T
Rated: T - English - Adventure/Supernatural - Chapters: 4 - Words: 10,902 - Favs: 2 - Follows: 1 - Updated: 12/11 - Published: 12/9 - OC, Chara
My Killer Sans Headcanons by MattMyBeloved
This is my full AU on Killer Sans. Let me know if you want info of other Sans's or any other Undertale Character! Please note that this is MY AU not canon Killer Sans. My Killer DOES have some canon facts on him though!
Rated: K+ - English - Friendship/Fantasy - Chapters: 3 - Words: 1,139 - Favs: 1 - Follows: 1 - Updated: 12/9 - Published: 12/6 - Sans - Complete
Another Charisk Tale by KontonNoKaze
And so it began. The SOUL that longed to rest on a bed of buttercups, under the sun Would do the last Fallen a favor, by ending their life as an offering To the ancient magic that locked Monsters on the Underground Charisk Tales - Part I of IV
Rated: M - English - Angst/Romance - Chapters: 14 - Words: 15,430 - Follows: 1 - Updated: 12/8 - Published: 11/19 - Frisk, Chara
Three Times Below by KontonNoKaze reviews
"Third time is a charm", or so one would say. After their attempt at building Chara's SOUL, Frisk gave up life once more. Floating, guiding their own beloved in what should be a peaceful journey in the Underground. One last time, to SAVE them all. Charisk Tales - Part III out of IV
Rated: M - English - Angst/Romance - Chapters: 14 - Words: 21,474 - Reviews: 1 - Updated: 12/8 - Published: 11/19 - Frisk, Chara
En el jardín by AcnoHeart
Eran las primeras vacaciones que se tomaba. Sans pensó que serian relativamente tranquilas, claro, si se ignoraba los gritos de su hermano, Papyrus, y el enamoramiento de este con Frisk; la molesta y deportista Undyne, intentando que se levantase del sofá y moviese el esqueleto; además de la familia Dreemurr, conocia a Toriel, pero sus hijos eran otra cosa. [Chara x Sans] [Chans]
Rated: T - Spanish - Romance/Friendship - Chapters: 17 - Words: 26,922 - Favs: 2 - Follows: 3 - Updated: 12/7 - Published: 7/18/2021 - Frisk, Papyrus, Sans, Chara
Undertale Before And After: The Mages by Tc the writer
Ever wonder why the legend says, "Those who climb the mountain never return?" This is our tale, the tale of the mages.
Rated: K+ - English - Fantasy/Supernatural - Chapters: 2 - Words: 6,765 - Updated: 12/5 - Published: 12/2
One Abode Above by KontonNoKaze
Three times below the Surface. It took them three lives to honor their promise. A childish, innocent vow to the one they know and love, to friends, to a newfound family. They know they will be missed, but they cannot go back to the living world At least, not for now. Charisk Tales - Part IV (Final)
Rated: M - English - Angst/Romance - Chapters: 12 - Words: 22,666 - Updated: 12/5 - Published: 11/19 - Frisk, Chara
There is a Musical for Everything by HopefullyNot reviews
Undertale characters react to Man on the Internet's Musical. When something more sinister comes to their attention, what will they do? I do not own Undertale or Undertale the Musical.
Rated: K+ - English - Drama/Hurt/Comfort - Chapters: 35 - Words: 56,116 - Reviews: 363 - Favs: 346 - Follows: 373 - Updated: 12/4 - Published: 1/5/2020 - Frisk, Sans, Chara, Flowey
The Golden Quiche by Sophtopus reviews
For Monsterkind, the Surface represented freedom. For Frisk, it's a return to some uncomfortable realities. It all began with a simple wish. When that wish faded, Frisk tried to move on. Except, 'moving on' was not so simple. Emerging from the Underground had put them in a worldwide spotlight. From an unknown child, they had become an icon of great value.
Rated: T - English - Mystery/Drama - Chapters: 241 - Words: 949,229 - Reviews: 375 - Favs: 436 - Follows: 399 - Updated: 12/4 - Published: 6/17/2016 - Frisk, OC, Papyrus, Sans
Undertale Au - A Freak of Nature by minhpro938
An Undertale AU, where the Multiverse have created a creature that goes against nature. Read it to know what will happen. (My first story ngl)
Rated: T - English - Fantasy/Friendship - Chapters: 9 - Words: 15,130 - Favs: 1 - Follows: 1 - Updated: 12/1 - Published: 8/17 - Asriel, Alphys, Asgore D., Blue Soul
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