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The Walls Around Our Hearts by papyruswiki reviews
What happens when you build walls around your heart for protection, but refuse to take them down, even when they're destroying you? A slow burn Papyton fic about trauma, support, friendship, and true love. Trigger warnings apply; these include discussions of abuse, rape, addiction, mental illness, and non-graphic sexual content.
Rated: M - English - Romance/Friendship - Chapters: 56 - Words: 209,331 - Reviews: 23 - Favs: 26 - Follows: 34 - Updated: 7/21 - Published: 8/6/2017 - [Mettaton, Papyrus] Frisk
Horrorswap-tale by Sans3465 reviews
getting stabbed to death and being reincarnated as a skeleton monster isn't the weirdest thing in my life but having multiple soulmates in Another Universe that's just too much and I have to deal with a creepy fan who believes that she is my soulmate and the others as well.
Rated: M - English - Adventure/Humor - Chapters: 4 - Words: 9,733 - Reviews: 10 - Favs: 31 - Follows: 28 - Updated: 7/21 - Published: 5/9/2021 - OC, Papyrus, Sans, Gaster
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: 17 - Words: 39,431 - Reviews: 2 - Favs: 7 - Follows: 8 - Updated: 7/21 - Published: 4/6/2021 - Papyrus, Sans, Undyne, Toriel
Stained Mirror by Artientxc2 reviews
You life has been pretty normal, even what has been going on in the world. Monsters had just gotten to the surface. You really don't think much of it at first, until you are tied into this new world after receiving strange messages on your bathroom mirror in blood. {Underfell Napstablook X Reader}
Rated: T - English - Romance - Chapters: 1 - Words: 425 - Reviews: 1 - Published: 7/21 - Napstablook
Twilight of the Dreemurrs by CoramDeo reviews
The barrier has been broken, monsters are free, and life is good for a human boy and his adopted mother. So why is Frisk poring through every book he can find about monster history? And why does he keep returning to Mount Ebott time and time again?
Rated: K+ - English - Adventure/Family - Chapters: 27 - Words: 88,116 - Reviews: 16 - Favs: 8 - Follows: 9 - Updated: 7/20 - Published: 12/27/2021 - Frisk, Asriel, Chara, Flowey - Complete
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: 23 - Words: 75,405 - Reviews: 6 - Favs: 26 - Follows: 24 - Updated: 7/20 - Published: 4/23/2020 - Frisk, Chara, Gaster
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: 10 - Words: 56,454 - Favs: 8 - Follows: 4 - Updated: 7/20 - Published: 4/1/2021 - Papyrus, Sans, Undyne, Alphys
Poisonfell by AngelxYasutora
Has been Mentioned in "Journeytale: Younger Years" before but this is the AU that Flowey originally comes from but in the past by a few years before he was born I'll write a Summary for it later but for now I don't have any time for it
Rated: M - English - Angst/Romance - Chapters: 3 - Words: 5,339 - Favs: 1 - Follows: 1 - Updated: 7/19 - Published: 7/16 - Frisk, Papyrus, Sans, Chara
UnderSitter by 5iveAM reviews
Grillby finds himself babysitting for the creepy scientist's kids. He loves it until he discovers a secret they've been hiding that could be soul-threatening. (Updates regularly)
Rated: T - English - Drama - Chapters: 17 - Words: 23,239 - Reviews: 5 - Favs: 14 - Follows: 21 - Updated: 7/19 - Published: 12/2/2017
When World's Collide by ThatSansFan
The barriers been broken for about three years now. Frisk is eighteen, just graduated highschool and found herself lazing about with Sans. But Sans has a secret project he's been working on and he isn't telling anyone what it is. But Frisk is determined to know and she's not taking no for an answer.
Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 3,954 - Favs: 1 - Follows: 1 - Updated: 7/19 - Published: 6/2 - Frisk, Sans, Papyrus
Sans Tells Another Pun by The Bohemian Rhapsody
According to all known laws of aviation, a bee shouldn't be able to fly...
Rated: K - English - Humor/Spiritual - Chapters: 1 - Words: 215 - Published: 7/18 - Sans, Papyrus - Complete
Road To Hell: An Undertale Creepypasta by Spuddies reviews
A young man by the name of Nick buys a copy of his favorite childhood game, Undertale, but soon finds out that this is no ordinary video game, and something very wrong will end up happening to him…
Rated: M - English - Supernatural/Horror - Chapters: 1 - Words: 1,113 - Reviews: 2 - Published: 7/14
Dreemurr Chronicles: Our New Era by Ben10Extreme reviews
"My name is Asriel Dreemurr. Six years have passed, and we made it to the Surface. But the world around us is much more dangerous and complex than we initially thought. To reach true reconcilation between Humans and Monsters, we need to help improve the hurt world around us. It will be a difficult struggle for me and my loved ones...but it will all be worth it in the end."
Rated: T - English - Adventure/Family - Chapters: 97 - Words: 785,073 - Reviews: 455 - Favs: 206 - Follows: 198 - Updated: 7/13 - Published: 1/7/2017 - Asriel, Chara, Toriel, Asgore D.
DoubleStrain by XelaZagity reviews
Another DoubleKid. But what if his story, while not intertwining with The Hacker and The Anarchist, finally came to light on its own? The era of DoubleTale continues into one of the 21 original stories. Based off of DoubleTale: Rewritten by XWolf26
Rated: M - English - Adventure/Angst - Chapters: 2 - Words: 3,298 - Reviews: 2 - Favs: 1 - Follows: 2 - Updated: 7/11 - Published: 4/20 - OC, Gaster, Frisk
Deathly Exchange by Naruby7 reviews
Although it's quite strange, his heart yearns for another to keep him company, especially her. He wants her by his side, but what does she think? Undertale characters belong to Tobyfox, others are mine.
Rated: T - English - Romance - Chapters: 31 - Words: 61,166 - Reviews: 66 - Favs: 46 - Follows: 49 - Updated: 7/11 - Published: 6/18/2016 - [Sans, OC] - Complete
Pup by Mr. Mao
A strange teenager enters the Sanses lives causing chaos and stealing their nonexistent hearts along the way. Read more the find out 3 This is kind of a crack book.
Rated: M - English - Fantasy/Romance - Chapters: 1 - Words: 4,014 - Published: 7/9 - Papyrus, Sans
Crazy Mirror by AdmyralOperius reviews
Some people have a desire to fix everything, like Frisk; determined to save everyone. Absolutely everyone. It started as a thought, then became a fire, burning in the chest. Do you know it? Maybe you've felt it before? (Minor AU elements)
Rated: T - English - Adventure/Friendship - Chapters: 32 - Words: 303,742 - Reviews: 36 - Favs: 33 - Follows: 40 - Updated: 7/5 - Published: 11/23/2018 - Frisk, Sans, Flowey, Gaster - Complete
StoryTale by HeroGamer55 reviews
In the post-True-Pacifist world not everything is as it seems. Can the soulless really live on with a soul. Are monster and human hybrids bad or good and most importantly, can a fox handle an immortal flower.
Rated: T - English - Chapters: 11 - Words: 6,079 - Reviews: 1 - Favs: 1 - Follows: 2 - Updated: 7/5 - Published: 12/6/2021
Growing Pains: To the Stars and Back Again by twix012 reviews
This is a post-pacifist slice of life story of Asriel, still on his way to growing up and facing all the nagging aches and pains, despite it all, he's Determined to continue happily live his life with Frisk by his side, no matter however difficult it is, no matter how bad the growing pains get.
Rated: T - English - Romance/Hurt/Comfort - Chapters: 34 - Words: 292,132 - Reviews: 20 - Favs: 10 - Follows: 10 - Updated: 7/4 - Published: 1/18 - [Frisk, Flowey] Toriel, Asgore D. - Complete
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: 42 - Words: 56,670 - Reviews: 145 - Favs: 110 - Follows: 118 - Updated: 7/4 - Published: 4/2/2016
The Lone Defender by Sophtopus reviews
December 25, 2015 Mysterious black briars destroyed the whole of Ebott. Every inhabitant was lost except for a pair of brothers. Not long after, a tragedy claimed the younger one. Since then, the sole survivor did everything he could to prevent the calamity from spreading further.
Rated: M - English - Fantasy/Tragedy - Chapters: 15 - Words: 49,632 - Reviews: 1 - Favs: 15 - Follows: 15 - Updated: 7/3 - Published: 1/29/2021 - Papyrus, Sans
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: 24 - Words: 63,883 - Reviews: 2 - Follows: 2 - Updated: 7/3 - Published: 8/3/2021 - Papyrus, Sans, Chara - Complete
agetale by TrueLordPWNY reviews
Chara found themselves being bored. Maybe this new human that can see and hear them can relieve them of their boredom. The only issue is that the new human is a baby. Can Chara help the baby survive the Underground? How many years will the baby lose to the ability known as Reset? Why am I asking so many questions?
Rated: T - English - Family/Adventure - Chapters: 12 - Words: 13,238 - Reviews: 1 - Favs: 4 - Follows: 6 - Updated: 7/2 - Published: 1/10 - Frisk, Sans, Chara, Flowey
Historias del multiverso by Miguel16310 reviews
A partir de ahora en adelante publicaré aquí mis one-shots sobre Undertale y sus AU's, todo esto con tal de "racionar espacio" y no terminar abarcando tanto el sitio.
Rated: M - Spanish - Romance/Adventure - Chapters: 42 - Words: 300,035 - Reviews: 42 - Favs: 11 - Follows: 9 - Updated: 7/2 - Published: 6/28/2018 - Frisk, Asriel, Sans, Toriel
Sans faiblesse by Theta and Koscheii
[Fanfiction Underfell] Papyrus est dérangé par le comportement d'Undyne depuis quelques temps. La guerrière arrive en retard à tous leurs rendez-vous, en plus d'esquiver le sujet à chaque fois qu'il cherche à comprendre. Et puis, un jour, elle lui laisse le contrôle intégral de la garde royale et sort de sa vie, sans aucune explication. Papyrus refuse de rester sans rien faire.
Rated: M - French - Drama/Friendship - Chapters: 2 - Words: 4,252 - Follows: 1 - Published: 7/2 - Papyrus, Sans, Undyne, Asgore D.
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