Hope is a young girl with an open heart and a friendly manner who only wants everything to work out. What happens when a young girl with a green soul finds a family in a skeleton and a goat mom? Will life remain in the ruins or will it continue into something more? Time will tell if only it could...

"Do you want to be the first human on Mars ?" Frisk had never planned on being an astronaut, but with only limited time to prepare for a 8 months trip on their own and no hope of coming back to Earth after that, their SAVE power made them the perfect candidate and their help was requested by the space agency itself. Being given such an opportunity... How could they have said no ?

Sometimes, those who FIGHT must cast aside their battleclaws. Follow the story of Undertale through the eyes of Ginger Wingren, a young Barn Owl who ends up trapped within a human's pelt beneath Mount Ebott. As she adapts to her featherless form and new environment, she learns about monster history, interacts with the locals, and most of all, uncovers the hidden strengths of MERCY.

...I don't know if this is a good thing or not. I don't know whether I should have just stayed home, or done more. I don't know if I should have gone up that mountain that day...or meet any of them. ...but do I regret it? Not for a second.

The adopted daughter of the King and Queen of monsters, a young girl who can't handle humanity, both abandoned the civilizations of their birth species, lived a century apart, now they must work together to free the Underground and allow the monsters to see the sunlight once more. But will they be able to succeed, or will a certain flower stop them? Time will tell. Charisk.

Frisk and Chara, pacifist and genocide. two sides of the same coin, not always in control. What if someone new stumbled into the mix, dragging behind him his own troubles, something...otherworldly.

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.

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.

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.

Although Flowey is happy Frisk chose him to be her boyfriend, he cannot help but wonder if he's really the best guy for her. After Flowey expresses his concerns and tells Frisk she shouldn't be dating a flower, the human expresses her own way that he's wrong to think so. (Underfell AU)

After the Barrier's broken and monsters make it to the Surface, a certain ghost is left behind in the Underground. As Chara's situation couldn't get more pathetic, Flowey's warnings about the Reset consequences only made it all worse, opening old wounds. Angry and hurt, Chara faces a tough dilemna. Should they follow their angry impulse or Flowey's advice?

Chara had a bad day at work. Thankfully, her girlfriend Frisk knows just how to help. Just a fluffy little drabble based on a Tumblr prompt by sweethorns.

3 months after sans' death gastor is willing to do anything for a second chance with his son, but what happens when his quest uncovers a secret his son hid for his whole life. now it is his job to fill his sons shoes and take up a role that had lead to his demise

You know that dancing mushroom in the Temmie village that tells you whether or not you've spoiled your soul yet? This story is about that guy. Oh, and it's a genocide run, so that should be fun. If you're intrigued, you better read!

Twenty-one iterations of W.D. Gaster gambled on plucking a human from beyond their reality to stop a vicious cycle of genocide, and changed the multiverse forever. In a scrambled timeline, away from the grand tragedy of The Angel & The Anarchist, a young woman awakens on a bed of flowers in her pajamas...

bye bye frisk. someone new, yet familiar, is here. reality gives up, and flowy has slunk to shadows. the river person helps a stranger, and the skeleton shattered through time finds a very old friend. if this new human proves stronger than their predecessor, then maybe, just maybe, sans will see his father again. maybe, everyone will see the sun. but who knows. maybe not...

human from real world find himself in the underground 8 months before frisk fall. there will be other aus sans will appear.

When Sans is kidnapped and taken to another world the others need to try to rescue him. However they are not the only ones looking to find this world as they find unexpected help in this rescue. This world is rather different from what any of them are used to and has it's own secrets to be uncovered as not everything is as it seems at first. Rated M for safety for darker 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.

Red gets a call from Undyne with some unexpected news. He gets the day off, but it’s only to look after his sick brother. Fell has come down with something serious, and he isn’t too receptive to Reds help. How is Red going to do this without getting dusted for his efforts? (Underfell AU)

Golden Quiche / Crimson Keeper specific universe. A 'Chronographer' is a title reserved for those with the power and authority to observe, manage, and record the annals of spacetime. They're the primary historians of this world.

Bella had a hard life. Her mother died when she was 4, her "uncle" disappeared when she was 12, and her "cousins" were long gone. One day, her uncle's ex-assistant tells her to look through her uncle's research about the town's most cursed site, Mt. Ebbot. As she reads, forgotten memories return: fish with spears, goats with pie, flowers that talked... What was under Mt. Ebbott?

After a serial killer obliterated a good portion of the Underground, Sans, the considered weakest monster stood against it as a last stand. After pulling of a cheap trick, he just expected to the human to come back and try again but... that didn't happen. My take on what would happen after the 'get dunked on' moment if the human didn't reset.

I flinched when I felt the rocks move from under us, no longer able to hold our weight. I latched onto my sister just as the earth shattered beneath us and gave way to a free fall. Frisk screamed and I struggled to hold her to me. To use my body as a cushion when we made it to the bottom. One way or another, I wouldn't let her die.

An Undertale AU, where the Multiverse have created a creature that goes against nature.