Grouptale AU. Jo is a child that fell into the Underground as a way to escape. Travelling through the Underground with a child that fell in after her, they come across more and more children, who all seem to have fallen before them. Why would nobody miss seven children that all set missing within a month of each other? Something wasn't right, here.

After giving up his Soul, Frisk and Chara develops a partnership with each other. Before completing their sixth Genocide run, Chara tells Frisk that she grows tired of doing the same thing over again. After sparing Sans, he warns the two that if they gain a single point of EXP, there'd be hell to pay. Can the two do a successful Pacifist run, or will they go back to their old ways?

Chara woke up, not in their room, but on a bed of golden flowers down in the Pit. There's a human child sitting next to them, so this obviously could only mean one thing: Human invasion. So, they'll just murder the child, go home and make sure mum, dad, and Asriel are all okay. It's not like they woke up years in the future where they've been dead the whole time, right? [Charisk]

After the barrier was destroyed, everyone thought it was over, but nobody counted on there being another monster realm. The Emperor of the Outerworld – the fabled empire in the sky – abducts Frisk in order to use their soul to unlock an ancient power, one that could mean the world's demise. Join Frisk and company's second journey, filled with excitement, danger… and an old friend.

Papyrus was and is a lively skeleton, and moving to the surface didn't change that one bit. How does a cool dude like him deal with things like interdimensional threats, complex emotions, and a lack of spaghetti? By being the Great Papyrus, of course. Set after the True Pacifist ending, Frisk a little girl. ON HIATUS

In this Undertale story, 4 leaders rule the lands. They're by the names of Asgore, Toriel, Sans, and Undyne. They each have their own strengths, and the 4 of them together makes them best rulers of the underground. But then a human by the name of Frisk is found, and the leaders are unsure about what to do. Is this being dangerous, or is she the savior of monster kind?

Gaster did not care about the CS-1 project, he just wanted the current Royal Scientist to give up and let him go back to things he actually wanted to work on. Tangentally, CS-1 was not supposed to have a mind, and Gaster was not supposed to start worrying for him. Experiment!Sans adopted by Dadster.

With nobody but Chara to help her along, Frisk struggles to move on from her multiple pasts, unable to forgive herself. Sans can't forgive her either, and after he finally pressures her to confess all of her secrets to everybody, will their rejections trigger another reset, or something worse?

This is why Frisk and Flowey should never mess with Sans' stuff…

He fell, deep into the dark. Drumbeats echo. He moves forward, determined to save them. All the while, footsteps follow. A hand on his shoulder keeps him steady, he is never alone. [A 'retelling' story incorporating the 'narrator' theory].

"It seems the machine caused temporal instability in the nature of reality. In order to not shatter, it pulled our young Frisk to this time, which relieved pressure on the structure of the timeline and result in only some minor side effects." "You coulda died." Jack sighed. "Very nearly!" Gaster said excitedly, "In fact of all the possible outcomes, this was the most unlikely.."

Frisk and Chara fell together... as twins. Both are polar opposites, and both affect the timelines in ways that no one in the Underground ever though possible... (first fanfiction, and I suck at summaries... rated T because I'm paranoid - FemFrisk and FemChara)

Frisk always had weak lungs. When they fall into the underground it's fun and fascinating, until they begin to cough and grow ill and then... Frisk knows they don't have a lot of time. On their way to the barrier they happen to meet a fiery barkeep whose magic might be just what Frisk needs. A moment of kindness that changes both of their lives forever. Found Family. FireDad.

Hundreds of years later, the war with the Monsters is nothing more then a few pages in a history book. It is unknown where the Monsters were sealed away exactly, but that is not enough to stop Frisk. Join Frisk as she stumbles into the land of Undertale and struggles against the Monsters her people fought with so long ago. Novelization of Undertale. FemFrisk.

SEQUEL to Snippets from the Aboveground. What if instead of the Frisk we know, there was an even younger one who became lost in the Underground? This time a five-year-old Frisk who... Wait. This has happened before, hasn't it? Lost in the Underground, friends with the monsters, Saving them all... Well, Frisk would just /hate/ to ruin a good story.

Frisk was living on the surface with their new family. Everything was perfect except, the dreams that seem to belong to someone else. Something is left undone. The past is pulling them back. The world is reset, everything is undone. Somehow, they have to break the cycle and save everyone, and themselves. (pacifist run spoilers)

After leaving the Ruins a second time, Frisk decides they don't want to be Determined, anymore.

Good riddance, every obnoxious Monster is finally gone from the Underground. Now Flowey can have some state of peace being all by himself, wallowing in his defeat - wait. Why is that human coming back? Don't they have anything better to do? Welp, nothing can stop Frisk's DETERMINATION. Even if it has to take one step at a time.

Frisk promised she would save everyone, even them. But to do so, she will need to put up with the voices in her head, the patches in her memory and her regrets crawling on her back. This is it. One final, TRUE RESET.

A glimpse of the alternate world called Underfell as Frisk tries to survive in the brutal underground where it's kill or be killed. And she's all out of kill. Underfell AU, Older Female Frisk. Based on comic by ParodyPunk.

Five years after monsters returned to the surface in peace, Frisk, now thirteen, struggles to cope with painful emotions brewing in her head from the traumatic horrors she faced underground. With Flowey in tow and a familiar dark presence attempting to take hold of her mind, will Frisk lose control of herself and become consumed by the nightmare looming over her soul?

The advantage of having such a huge adoptive family is that you're never lacking a place to stay. But sometimes the learning curve on "how to care for your tiny human" can be a little steep.

You're exhausted. Every ending takes a little more out of you, but it just keeps restarting. Warning: contains violence and frequent mentions of suicide. Cover by eternal blossoms ( /u/3886989/ )

Monsters weren't doin so good, ain't been doin good since the war but that don't mean things ever got easy. Until prohibition mind, now that was a stroke of luck, the Dreemurr family was one of the first to start runnin booze. Doesn't mean there aren't those who'd try to cut in on the profits, but that's where a few bones and a lotta bullets come in. Mobster AU, Sans pov, no mercy.

Frisk has finally gotten the best result-breaking the barrier, and freeing the monsters. But, they've made mistakes along the way. Mistakes that can't be undone so easily. Post-pacifist ending dealing with the consequences of a genocide run. Focus on the family/friend relationships of Frisk and other characters. Mentions of abusive parents.

Frisk is an abused human child who runs to Mt. Ebott looking for an excuse to put them out of their misery, but instead finds a wonderful family. Rated T for some eventual adult themes, self harm, and suicide. Mostly frisk x sans.