A human falls into the Underground, and quickly realises that everyone there is either drunk, stoned, or completely off their face. Will they succumb to the temptations of the Underground or stay sober? [Warning: lots of drug use, swearing and graphic depictions of violence] {art by IPostStupidThings}

The Two who shouldn't get along until a creature from the void that was once forgotten starts to return to finish his project before he fell and will the two save the creature and return him to his old , friendlier and smarter self.

What if both monsters and humans had decided to separate themselves but not for the reason everyone was led to believe? After landing an internship at the lab, Sans finds himself questioning what's going on behind closed doors. He confronts them about these "experiments" he's heard about, and his ethics are brought into question when he must work around a very determined one. Frans

An adventure like some other kid we know! The soul of Curiosity and the 6th of 9 to fall, a story before Frisk and another character I have for some other time. My first Fic! T to be safe.

Just your old regular self insert. (Re-Using my OC Jake)

Very few people in Ebbotton mind that the senior home is run by monsters.

Moving to the surface has been an "Out of the frying pan, into the fire" experience for the monsters. In the absence of a dear friend, Frisk tries to cheer up the Skelebros in a world that doesn't live up to their ideals.

Chara is in for a Genocide run unlike any she has seen before. All your favorite, lovable characters have a chance to fight back in this, the Extreme Genocide Mode.

NOW COMPLETE! - In which Frisk lives in the Ruins forever and runs a restaurant. Sans moves in to help build some new infrastructure. Frisk is... a perfect child who can do no wrong! And Sans, he's so good at protecting her... that he could do it in his sleep.

What happens when the Royal Scientist discovers how to Compress magic and store it for later use? What happens when the human Frisk is too scared to face Asgore? Could the Monsters actually break the barrier without having to kill a Human?

The pacifist run has ended, the monsters are free and Frisk has a family. Nothing could go wrong. Or NOT! A ghost has been waiting for the right moment to strike and now has finally found it. But someone's stronger than they thought. (Fem! Frisk and Fem! Chara) Complete.

Frisk has terrorised the underground and refuses to break the barrier to release the monsters. Toriel and Sans hide in the ruins trying to cope with the loss of those they love. Then one day... another human fell down the hole...

[One Shot] Sans et Papyrus sont les deux faces d'un même cerveau. Lorsque l'un disparaît tragiquement, l'autre, laissé au désarroi, ne rêve que de revanche.

Neutral ending time, folks! Queen Toriel has returned to rule, but things are never smooth for a new ruler, especially when times are grim. Conflicting ideologies threaten to tear apart the Underground... and at the heart of it sits the royal scientist, staggering under the weight of her secrets.

"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."

Nearly 600 years have passed since humans and monsters first met. Despite the king's best efforts though, not all monsters are pleased with their human neighbors. Sometimes, drastic actions need to be taken. A new era has begun. It may lead the kingdom to crumble apart from the inside. Another chapter in the Undertale: Chronicle AU.

Violet has never had a girls night out before. Muffet decides to change this.

(HALLOWEEN SPECIAL TWO-SHOT!) What if Undyne decided to collect LV to kill Frisk? Dusttale AU

Red, Underfell Sans, sneaks out for a bit only to find a group who take in those that need a safe place to escape from their previous lives. He decides to join them believing he will protect his brother. Things don't go in the way of just being good. Soon the Fell part of him shows and things could really get messy. Halloween! WARNING: Gore, Blood, and Death.

Blue, Underswap Sans, is training to become a royal guard. He now must learn about poison as a part of his training. However, learning about this could end up with some disastrous consequences. Things go downhill very very quickly. And a once thought to be innocent monster takes a turn to the darker side and will anyone be able to stop him? Halloween! Death, some blood and gore.

Many years have passed by without escape from the underground. All hope seems lost but one goat king remains hopeful. Asgore is invited over to Muffet’s for a surprise but what lies in store for the king?

Emotions. They control our every action. So, what happens when emotions become non-existent? Another chapter in the Undertale: Chronicle AU.

Geno decide avec ses frères de faire du camping ! (Oui c'est petit tu vas faire quoi hein !)

Collab w/ AnimalHumanFriend. Frisk and co. attend a costume party for humans and monsters. Hoping to win a costume contest, Alphys gets the idea to create potion that turns the monsters into humans and Frisk into a monster. It goes well and everyone has a blast...until the night ends and the potion does not wear off. Now they must either wait for it to wear off or make an antidote.

Everyone had a breaking point, even the Light Sans. After all that's how Dark Sans were Born. Blueberry, Just had enough.