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Soul of our Hearts by Congar reviews
Human magic before the Barrier was achieved through the Cooperative Connection, a bond wherein a monster gifts his or her memories, and thus a part of their soul, to a human. Discovered when Queen Toriel gifted a blind prince a blanket which she weaved in her memories of describing the starry sky far above her castle in the Monster Capital.
Rated: T - English - Fantasy/Adventure - Chapters: 241 - Words: 935,568 - Reviews: 2 - Favs: 8 - Follows: 8 - Updated: 9/16 - Published: 7/1/2022 - Toriel, Asgore D., Gerson
Undertale: The kidnapper by NastYwriter
Sans is kidnapped kidnapper...
Rated: M - English - Mystery/Horror - Chapters: 1 - Words: 161 - Published: 6h - Sans
Undertale:After Story by Empv
The story right after Undertale.
Rated: T - English - Drama/Family - Chapters: 10 - Words: 1,795 - Favs: 2 - Follows: 3 - Updated: 7h - Published: 2/13/2018 - Frisk, Toriel, Sans, Monster Kid
OurTale by Dragon Slayer 20XX reviews
After thousands of resets, Frisk succeeded in doing what everyone, including Sans, thought impossible: bringing back the lost prince and destroying the loop that was causing them so much suffering. Two years later, now an ambassador, he seeks to restore human-monster relation, while fighting against an evil that seems to be spreading in Ebott and threatening his new family.
Rated: T - English - Family/Friendship - Chapters: 14 - Words: 34,087 - Reviews: 4 - Favs: 7 - Follows: 7 - Updated: 23h - Published: 8/4 - Frisk, Asriel, Sans, Chara
Hopetale by Papermarioknight4178
It has been a month since Frisk has went missing... but for some reason, it feels as thought she has been gone for months. Her sister, Eve, decides to follow in her footsteps and discover something bigger.
Rated: T - English - Adventure/Fantasy - Chapters: 4 - Words: 5,070 - Updated: 9/16 - Published: 8/25 - [Frisk, OC] Sans
Life & Soul by Quillion9000 reviews
Before the start of this story, seven Humans, varying from children to teens, climbed Mt. Ebott for various reasons. No matter their reason, all seven fell into The Underground. What I can confirm for you now is this: The Eighth, despite a differing circumstance, has the same reason to climb the mountain as the first. Like the seven before him, he will fall into the Underground.
Rated: T - English - Adventure/Fantasy - Chapters: 3 - Words: 13,688 - Reviews: 2 - Favs: 2 - Follows: 3 - Updated: 9/16 - Published: 9/12 - [Frisk, Chara] Sans, Gaster
A star across time by Miguel16310
Being a normal day like any other, Mettaton has ended up in a place and time he doesn't belong to, but even if he's alone, the star of both monsters and humans will shine and bring home no matter where he's at. Happy eight anniversary, Undertale.
Rated: T - English - Adventure/Fantasy - Chapters: 1 - Words: 16,453 - Published: 9/15 - OC, Undyne, Alphys, Mettaton Ex - Complete
La estrella Milenaria by Miguel16310
Estando en medio de un día normal y corriente, Mettaton ha terminado en un lugar en el que no pertenece, pero incluso estando solo, si hay algo que caracteriza a la estrella favorita de humanos y monstruos es su capacidad para brillar e inspirar esperanza sin importar donde esté. Feliz octavo aniversario, Undertale.
Rated: T - Spanish - Adventure/Fantasy - Chapters: 1 - Words: 15,767 - Published: 9/15 - OC, Undyne, Alphys, Mettaton Ex - Complete
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 another 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: 23 - Words: 53,516 - Reviews: 2 - Favs: 9 - Follows: 9 - Updated: 9/15 - Published: 4/6/2021 - Papyrus, Sans, Undyne, Toriel
River Flows by SbOcean
The Riverperson is a very mysterious person in the Underground. Letting Frisk ride in their boat wherever they need it. They are always so carefree, but what if there is more underneath the surface.
Rated: T - English - Hurt/Comfort/Friendship - Chapters: 3 - Words: 3,147 - Follows: 1 - Updated: 9/15 - Published: 6/11 - Frisk, Sans, River person
One World, Many Souls by Halloween Witch reviews
With a quick use of Sans' magic, we had returned to our home on the surface. The lovely three-story home sat quietly among the trees under the moonlight. Sans always loved to teleport just outside the door and glance at it before walking in. He was a little less lazy since coming to the surface. So much to learn. So much to do. So much to love. SEQUEL TO "TWO WORLDS, TWO SOULS"
Rated: T - English - Adventure/Romance - Chapters: 26 - Words: 107,476 - Reviews: 119 - Favs: 24 - Follows: 20 - Updated: 9/15 - Published: 3/25 - [OC, Sans] Frisk, Papyrus
Rift by scians reviews
"The ninety-fourth reset. That's when he started to unravel—or at least, that was when you started noticing." Despite reaching a "perfect" ending, you still reset in the hopes of saving Asriel . . . at the cost of losing Sans. When rewinding time is no longer a factor and events don't go as planned, can you find a way to save everyone? TW: depression, suicide, self-harm, language
Rated: T - English - Hurt/Comfort/Drama - Chapters: 17 - Words: 88,043 - Reviews: 33 - Favs: 122 - Follows: 122 - Updated: 9/14 - Published: 5/18/2018 - Frisk, Sans, Flowey, Gaster - Complete
CharaFell by Op7 reviews
(Being Continued) Down into the dark, Chara fell. Down into the dark, an experiment was run. What if she got to go home? But what if it wasn't to the world as she knew it? What if she was placed into another, at another time? What if that happened to be a version of Underfell?
Rated: T - English - Fantasy/Adventure - Chapters: 43 - Words: 118,999 - Reviews: 12 - Favs: 40 - Follows: 45 - Updated: 9/14 - Published: 5/1/2016 - Sans, Chara, Toriel, Flowey - Complete
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: 102 - Words: 1,269,299 - Reviews: 1538 - Favs: 396 - Follows: 389 - Updated: 9/13 - Published: 12/28/2018 - OC, Chara, Monster Kid, Gaster
The First Step To Peace Is Healing by GoldGuardian2418 reviews
Thanks to a visit from an alternate Gaster, Frisk now has the power to heal the AUs, but something is trying to stop her. Can she succeed in her quest? Done as a request for dream1990. :)
Rated: K+ - English - Adventure/Family - Chapters: 10 - Words: 14,968 - Reviews: 5 - Favs: 12 - Follows: 10 - Updated: 9/11 - Published: 7/9 - Frisk, Papyrus, Sans, Gaster
MX18 Re-Assemble by darkshadowmaverick
it's been 25 years since Captain N'ation disbanded MX18 however with the growing threat of other military organization/unit's like Snazyu & The Green Mountain Malisha Boys it looks like MX18 won't be staying that way for long.
Rated: M - English - Adventure/Romance - Chapters: 7 - Words: 9,404 - Updated: 9/10 - Published: 8/27 - Frisk, Asriel, Chara - Complete
DoubleTrigger by Fixer140.85 reviews
"Might controls everything. And without strength, you cannot protect anything." A man falls into the underground and finds himself face to face with a demon. But he doesn't have the strength to beat them. In order to protect the ones he loves, he swore to do what ever it takes. Even if it means becoming a demon himself. (Based on XWolf26's DoubleTale)
Rated: T - English - Adventure/Angst - Chapters: 6 - Words: 39,484 - Reviews: 6 - Favs: 6 - Follows: 7 - Updated: 9/9 - Published: 5/22/2022 - Frisk, OC, Chara, Gaster
Divine Soul - Genesis by Myu98 reviews
A single choice has a huge impact. Not just on one person's life, but on everyone around them. In the Underground, there are many paths one can take. But when Frisk makes a choice that takes them off all the known paths, the world is changed forever, and Frisk becomes intrinsic to the fate of not just Monsters, but the whole world.
Rated: T - English - Family/Fantasy - Chapters: 32 - Words: 139,429 - Reviews: 46 - Favs: 33 - Follows: 33 - Updated: 9/8 - Published: 2/3 - Frisk, Asriel, Toriel, Asgore D. - Complete
Bard's Tale by Mezameta Durai reviews
Tell me my friend. A story as my eyes fall, one last story of how it ends, how it begins... and once its over let my eyes fall peacefully, and then when we meet again you can tell me everything new. "Well... it all began with a tear."
Rated: M - English - Hurt/Comfort/Romance - Chapters: 11 - Words: 99,131 - Reviews: 7 - Favs: 9 - Follows: 11 - Updated: 9/6 - Published: 2/8/2020 - [Frisk, Asriel] [Chara, OC]
Deathtale by Lunaitor1 reviews
In this universe, the timeline is messed up, no one is nice anymore, and they hate humans. But...is the pacifist route really impossible in such a place? Come in if you want to find out
Rated: K+ - English - Adventure/Humor - Chapters: 1 - Words: 1,690 - Reviews: 1 - Published: 9/4
An Untitled File by GoldenFl0ret
After the barrier is broken and all the Monsters are freed, Flowey finds himself alone in solitude once more. With no Frisk, no friends, no hope of returning to his former self, he languishes in despair. That is... until he meets a new friend. (In Progress) (Post-Pacifist / Warning: OC!)
Rated: T - English - Hurt/Comfort/Angst - Chapters: 8 - Words: 42,209 - Favs: 2 - Follows: 2 - Updated: 9/3 - Published: 6/15 - Asriel, OC, Flowey
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: 9 - Words: 28,868 - Favs: 1 - Follows: 4 - Updated: 9/3 - Published: 12/18/2022 - OC, Papyrus, Sans
TrustTale by darkshadowmaverick
everyone is free, everyone is saved. but what happens when a new soul/soul trait is created to replace frisk's old one, the soul of trust what will happen now?
Rated: M - English - Hurt/Comfort/Fantasy - Chapters: 4 - Words: 6,668 - Favs: 1 - Follows: 1 - Updated: 9/2 - Published: 8/30
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: 250 - Words: 998,452 - Reviews: 384 - Favs: 458 - Follows: 416 - Updated: 9/2 - Published: 6/17/2016 - Frisk, OC, Papyrus, Sans
Undertale: AI-Lore by HermelindaKOD
This is an AI story about Undertale. Almost every text is generated by this, but some of them are modified by me, to make the story have more sense or better format. This may contain weird ships, I'm not sure.
Rated: T - English - Adventure - Chapters: 3 - Words: 5,903 - Published: 9/2 - Frisk, Sans, Toriel
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