A change, a small varible plucked from afar and placed in the land of Undertale. Watch and Read as The Variable goes through life, faces gang, government...and more

Gaster fights in the war and loses everything he loves. He becomes desperate to free the Underground and get revenge on humanity but that soon changes when an experiment takes a turn Gaster didn't expect, now he has a child to look after...

Two same but different skeletons are in for a wild ride, when they're forced to swap places. This will be the greatest scientific feat of the century! They've double and triple checked everything. Every test thus far has been successful. Still, one more guinea pig can't hurt, right? And Alphys and her friends know just the rodent! Sans isn't too sure about this...

What if cracking someone's back had different implications for someone that was all bones? A mostly humorous one-shot about Sans's attraction to the protagonist. Rated T for safety.

Something happens to stop the normal flow of a Genocide run. An anomaly appears...but maybe it's not the one you think.

After 1,000 years, monster kind is finally free from their underground prison. Sans fear of another reset has slowly faded away, trusting Frisk with their future. The past though, keeps calling. There's a story left untold in the underground. This, is that story. The truth of the past. This is the story, of Semi Gaster. Yes, you read that correctly.

You were doing your normal day, drawing skeletons for a friend. You wake up to find that the drawings came to life and now you have to live with a lot of Sans. Anything can happen, maybe even find love in one of the skeletons.

Don Reviews your O.C.s. NO CURSE WORDS

DIRECT SEQUEL/EPILOGUE TO "PATCHWORK SOUL" — 3 months later. A family of monsters and their little human kid try to start life anew beyond the confines of a giant mountain. Maybe they find something. Maybe they lose something. Time flows ever onwards, but sometimes it goes sideways, and it's heavier than they thought.

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!

You know the tale. A boy who just wanted to be left alone took a bite of an apple and he let the negativity and hate fill him and consume him. Though, this one is a bit different. After all, whoever suspects the positive one to be the most dangerous?

Sans is putting himself through hell - not knowing that there's someone out there who wants to save him. Based on the Dusttale AU.

I would recommend reading my fic "Dark Corners" first to really understand the meat of this. Christmas is right around the corner and Frisk's friends/family plan to surprise him by inviting his beloved biological father to join their holiday festivities.

One day a newborn baby girl named Frisk falls into the underground she meets Toriel, and her two children(Chara and Asriel), One day after she turns 13 she sneaks out only to meet an unfair world. But she meets end falls for Sans Rating T for blood, Weapons, and For languags

After two-thousand years, an unexpected consequence of the Human-Monster War emerges with a seductive promise.

[Sequel to Frisk: God of the World] As they begin their first year of college, Frisk and Chara remain deeply in love and plan a special date together, but a new law banning resets has Frisk on edge. Are Frisk's fears justified, or is he just being paranoid?

(Au Sanses x reader) you have lived alone since when you were in high school, not wanting to be treated differently because of being part of a wealthy family. But what happens if 25 year old you starts to live with seven skeletons that appeared literally out of thin air in a world where monsters do not exist for humanity? Stay tuned!Little warning: there might be some mature stuff

Frisk isn't particularly fond of her family and her home. So when she discovers the existence of Monsters, she decides to explore Mt. Ebott to see them. But when she wants to stay with them, fate has a way of nudging her forward. And then with the interference of otherworldly forces... things will get out of hand to say the least. (Pacifist Chara) (Features SansXChara)

Happening upon Mount Ebott, a young Barn Owl named Ginger Wingren makes the mistake of trying to fly down the hole, and wakes up not only stuck in the Underground, but also...a human, somehow. Her goal is to adapt to her new surroundings and form and ultimately escape the mountain and the monsters inhabiting it, but as she journeys onward, something else about her begins to change.

[Fanfiction Undertale] A la fin de la guerre, les monstres, en partie anéantis, n'ont d'autre choix que de gagner le Mont Ebott dans l'espoir de survivre un autre jour. Sans et Papyrus, contraints de fuir après l'attaque de leur village, se retrouvent livrés à eux-même. Les deux squelettes vont devoir affronter le pire et le meilleur de l'humanité pour s'en sortir.

(A joke fanfiction. don't expect this to be updated) Sans Undertale is Dating Tony the Tiger

So in the last couple years Undertale is still a big thing and the creative community have had tons of inspiration. Especially in the AU department. Here Mako will be going through the various AU's and help those new to the fandom by giving the basic info anyone needs when checking out our favorite skelebros.

Happily ever afters seem nice on paper. The words 'The End' usually mean that it's all over. That the heroes won. Well life doesn't end after the happily ever after. Sans would have find that out the hard way. Sequel to There's No Such Thing as a Happy Ending

Saving the world doesn't mean just getting the best ending. It means sacrificing ones life in order to stop a possible reset. But one hard headed skeleton is there to remind us happiness doesn't always come in the forms we expect.

It's almost been a month since he first heard her voice on the other side of the door. Now having developed some feelings for the mysterious woman, Sans decides to take the next step and starts to use some flirty puns and jokes instead. How will she react?. Will she open the door? or leave him outside in the cold?.