Frisk falls in the underground at a time where Asriel and Chara are still alive and is first found in the ruins by the latter. Frisk being a human, Chara considers them as a threat to monsterkind, especially once they discover Frisk has the ability to go back in time and erase the consequences of their actions. Can Frisk show to Chara that not all humans are as bad as they think ?

A prophecy, whispered between darkness. A child, born of light and shadow. A promise, given only to men and beast. A war, breaking them apart. A perniciousness, resulting from the taint of an Angel. Scores of tragedy and pain. A story of many lines, many events. A cursed catalyst to unite them all. Frisk's rise to power fails.

Undertale but with 4 players. I hope you enjoy it :)

Darkness fell over the kingdom as hope died. The king and queen lost both children the same night. This is their story.

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]

[AU Horrortale] Après son combat contre Omega Flowey, Frisk a fui les Souterrains pour aller chercher de l'aide. Malheureusement, les humains ne sont pas aussi compréhensifs que ne le sont les monstres et ils refusent de le croire. Dans les Souterrains, Undyne et Toriel se livrent une guerre de pouvoir pour prendre le trône, aux dépends de leur propre peuple.

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

Chara and Frisk embark on a journey through the underground. The only thing that's different than every other universe where they do this is... Well, it's not good to spoil someone on their true nature, is it? Frisk will do anything to ESCAPE the Underground, and nothing will stand in their way. Chapter art available on Ao3 and DeviantArt.

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)

Undyne recruits Sans and Frisk to help her get some 'revenge' on Papyrus. Sequel to "A Tough, But Good-Hearted Warrior" and a bit of a sequel to "Prompt 16: House Chores" and "Revenge Of The Fish Captain". :) Done as a request for both Smileheart110 on DA and for The gay geisha's little brother. :)

Alternative Universe (AU) Story of an adult human male replacing Frisk and taking part in the events of the Original Story of Undertale. Plus he talks has his own personality and backstory. UT:RD Playlist in Profile Bio. Undertale belongs to Toby Fox

While monsters celebrate their second decade on the surface, the Ambassador of monsters, Frisk, struggles with racial public and political officials as they continue to try to pass a law that will allow monsters to live outside the city limits. Just as when they try to take a step back from the chaos of their life, Frisk gets erased from existence. (Adult!Frisk)

In a world where monsters and humans share the surface there are those who have taken to the life of being pirates. One of those happen to be Sans a female skeleton who is apart of the highest ranking pirates. However as much as there is enjoyment in her life at sea not all is good. She'll face challenges and get through some struggles that remain. Rated M for some dark themes

"Long ago, two races ruled over Earth: Humans and Monsters." One race feared for their strong souls, the other for their magic, and the mages caught between them feared for both. All silently knew that war would be inevitable. The only thing that mattered was surviving it. One crimson mage understands that well, and is determined to keep herself and those she cares for alive.

After an abandoned genocide route and an abnormally placed TRUE RESET button, I have now respawned on the field of buttercups with no way to do another genocide route. No weapons, and the other characters that can remember timelines know nothing of it. Can I redeem myself in the underground? Let's find out. Sans X OC Rated T for that. PS: I suck at summaries.

Frisk has a curse that makes a flower grow on them every time they die. In an UNDERGROUND full of ruthless monsters, it's hard to stay alive. They meet a friend who is their only source of protection, and they start to think, maybe they'll make it out of the underground after all. But will they? Frans. Based on a story with the semi-same name on tumblr. FRISK IS EIGHTEEN!

A little self- insert story I made for myself for my birthday. Will continue it after today tho

A collection of inane nonsense (ranging from Error being reincarnated as Palette to Dust finding a new love for the color pink) circling around the many AUs and Multiverses of the Undertale world. Some stories will be connected; Others will be random one-shots. Stop by and see what treasures, or horrors, you can find.

There are monsters in the forest. Now trapped within the endless woods surrounded by mask-wearing individuals, it is up to Frisk to discover the truth of the forest and to find the lost past of her mask companion all while hiding what she is from those who would seek to wear the skin of her face as their own.

It's just another late night for Gaster. Not something he's fond of doing, but at least his oldest is old enough to care for his youngest. But when the Royal Scientist finally enters Snowdin, everything is closed, all the lights are off-as it should, for the ungodly hour Gaster was arriving in-but all the lights in his house were still on. Something wasn't right. GB AU

This is a more realistic interpretation of Toriel and Asgore trying to fix their relationship, and Frisk opening up about the resets.

Lol back on this stupidity. [Charas will be referred to as he/they unless stated otherwise]

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 what it is and she's not taking no for an answer.

After doing so many reset, so natural routes, pacifist and genocide. Frisk slowly started to fall between the cracks of humanity and become a real monster but her determination refused for her to become corrupted by the hatred of the world she lived in so decided to do one last reset in the hopes to make things right, but she woke up in a world completely different from her own.

So, it just so happens that the core is going into meltdown and someone had the awesome idea of asking its creator to help. Small problem with that though... he apparently kind of doesn't exist anymore! How to resolve this? Simple, send someone into the past, namely you, to go and ask them... nothing could go wrong right?