1 - 20 of 175 Works in Human-Monster War (Undertale)
Navigation
Listing Works
-
Tags
Summary
Poor Spamton was so tired after his day of patrol luckily Ant will make sure he gets enough sleep.
-
The Knight, the Princess, and the Dragon by OwlAndErmine
Fandoms: Deltarune (Video Game), Undertale (Video Game)
28 Oct 2025
Tags
Summary
Kris is a knight, duty-bound to protect their princess no matter the cost. Noelle is a princess, looking for her true love's kiss to break the curse she's been under since she was a child. Susie is a dragon, scorned by humans and intent to pay her pain back by whatever means necessary.
"Together they face fate and find,
A union to connect both kind" -
Tags
Summary
A year has passed since Frisk has freed the Underground, and their desire to learn more about their friends hasn't stopped there. After asking Asgore about the lack of skeleton monsters and realizing that the mystery behind Sans and Papyrus goes much further than they thought, they set out to find answers. What started as one question quickly spirals, and they and their friends stumble into something bigger than they ever could have imagined.
Summary to be redone as the story goes on.
-
Rest tired upon me, Just breathin' softly. Outside the city burned Lord, it was hell on Earth by shittywritingsdotorg
Fandoms: Deltarune (Video Game), Undertale (Video Game)
26 Oct 2025
Tags
Summary
Sampson, a half-human, half-monster, lives in grief and despair after monsters are banished underground by humans following a brutal war. Sam never fought in the war—he was too weak, discouraged by his human partner, Anthony, who feared for his safety. Despite this, Sam is now trapped underground, separated from Anthony and their unborn daughter, a fragile egg left in Anthony’s care on the surface.
-
Tags
Summary
Things were great at the start...until the war split Spamton and Tenna apart. While things look murky ahead, the little mailman refused to let things end.
---
Spamton and Tenna are separated by war and result to writing letters through the barrier. -
The Tales of Kháos: A Reapertale Re-Take by Palito266
Fandoms: Undertale (Video Game), UTMV
19 Oct 2025
Tags
Summary
A sequel to the previous three stories: "Tales of Infinity," "Tales of Pragmatism and Fabulism," and "Zero Tales."
Follow the gods: a brand new species that had been given consciousness by a mysterious form and a body as well. Explore how these deities accustom not only to their existence but also to the world around them that they must protect.Reapertale was created and is owned by Renrink. Inktale was created and is owned by Comyet. Dreamtale was created and is owned by Jokublogs. Errortale and Fresh Sans were created and are owned by Crayon Queen.
(English is not my main language, so there may be some grammar issues.)
Series
- Part 4 of Markings of the Cosmos
-
Tags
Summary
Deimos, the God of Fear, revealed in mortal's fear and misery on Earth. Monsters wreaked havoc, allowing Deimos to grow powerful overtime. It was so chaotic that Ananta, the God of Creation, took notice. It seems that Deimos has forgotten his role as a God.
Series
- Part 1 of FEAR Inc.
- Language:
- English
- Words:
- 9,912
- Chapters:
- 4/?
- Hits:
- 16
-
Tags
Summary
Sans did not remember his previous name, only that he had been human. Rebirth in Undertale was novel, but he adapted, until he realized that the universe he was in was not the original one.
Unfortunately, it was too late when the machine took him to another universe, into a room full of skeletons.
——————————————————————————————
Sans no recordaba su nombre anterior, solo haber sido un humano. Renacer en Undertale fue una novedad, pero se adaptó, hasta que cayó en cuenta de que el universo en el que estaba no era el original.Lamentablemente, ya era tarde cuando la máquina lo llevo a otro universo en un cuarto lleno de esqueletos.
Nota: Sé que suena como tragedia, pero en realidad es una historia bastante esponjosa de curación, o al menos eso intento. Nuestro protagonista tiene mucho trauma y lo va a sanar en una mansión llena de esqueletos incómodos
-
Tags
Summary
The peace between humans and monster begins to waver as they both discover the power of the humans souls, creating a gap between both races. Prince Asgore alongside a young Gerson and more monsters will set out on a quest to try and stop the knowledge of souls to spread further and create havoc among the realms. Yet we all know that war is upon them and there's nothing they can do to avoid the tragedy.
-
Tags
Summary
In a world marked by prejudice between humans and monsters, Gerson finds in his companion something the rest of the world can’t understand, a friendship capable of breaking barriers and changing what once seemed written in stone. Sometimes, all it takes is a sincere connection to rewrite an entire story.
- Language:
- English
- Words:
- 489
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 30
-
Tags
Summary
En un mundo marcado por los prejuicios entre humanos y monstruos, Gerson encuentra en su compañero algo que el resto del mundo no entiende, una amistad capaz de romper barreras y cambiar lo que parecía escrito en piedra. A veces basta una conexión sincera para reescribir la historia entera.
- Language:
- Español
- Words:
- 496
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 7
-
Until war do us part by unhealing_song
Fandoms: Deltarune (Video Game), Undertale (Video Game)
05 Oct 2025
Tags
Summary
Spamton only wanted two things: Prove all your family wrong and wake up by Tenna's side. But as the shadow of war draws near, he begins to realize that power and love can be just as uncertain as the human soul.
-
From War to Science by Emotistic Optimistic (death_frisbee)
Fandoms: Undertale (Video Game)
05 Oct 2025
Tags
Summary
The Royal Scientist. Creator of the Core. Pioneer of DT research. Friend to the Dreemurrs. Last of his kind and lone survivor of his village.
But does any of it matter if no one remembers he existed?
Series
- Part 2 of Reset
-
After the War is Over by gaudyAficionado
Fandoms: Undertale (Video Game), Deltarune (Video Game)
05 Oct 2025
Tags
Summary
After being sealed underground for centuries, the barrier is finally broken, and monsters can return to the surface. Ant Tenna, a boss monster, hesitantly decides to seek out his old human partner, Spamton G. Spamton. He instead finds their old home ancient and abandoned along with a box of letters addressed to him.
-
The World is a Stage by KeyKWriting
Fandoms: Deltarune (Video Game), Undertale (Video Game)
05 Oct 2025
Tags
Summary
Tenna is a rather well-off monster: He’s close friends with the Queen and King of monsterkind, he owns a popular traveling show, and everyone knows his name! But lately, his show has been dipping in popularity. If only a human would break into his caravan one night trying to steal from him, get caught, give some advice, and get looped into his show!
Series
- Part 1 of Human/Monster Spamtenna
- Language:
- English
- Words:
- 2,367
- Chapters:
- 1/?
- Kudos:
- 35
- Hits:
- 221
-
Tags
Summary
Long ago, two races ruled over Earth: Humans and Monsters. Religion and fear of differences troubled the fragile peace on which both species were living so far. A war for faith and honor soon engaged between them. Long. Endless.
Sans and Papyrus, two young skeletons brothers, sons of the Royal Scientist, lost everything in the rage of the fighting: their home, their family, their childhood. During a human attack, they suddenly found themselves delivered to bullets and bombs, all alone.
Both of them started a journey in the devastated landscapes of the end of the war to join Mont Ebott, where Monsters are preparing for a last battle. But could two kids survive by themselves in the wild and without any help?
-
Tags
Summary
The monsters, in a desperate attempt to win the war with the humans, have begun to revive human skeletons in order to fight for them and bolster their numbers.
-
Don't fear the reaper by RotBellyCrane
Fandoms: Deltarune (Video Game), Undertale (Video Game)
27 Sep 2025
Tags
Summary
Chapter 1: Spamton, a monster whose lost his faith in place for something more shadowed, has fled the coming end of the war with his business partner - an incident on the long journey slows them both down, but they'll meet back up with the rest of their company in the next few days.
Chapter 2: ???
-
Tags
Summary
The Goddess of the Sun, supportive of Humans.
The Goddess of the Moon, supportive of Monsters.
Two sisters in a battle between two species, two opposites against one another. What will happen when the Day tries to force itself over the Night?
-
Tags
Summary
"You never know." You shrugged and flopped down on the grass beside our oak tree. I lay down beside you, letting your arms drag me closer and wrap around my torso. Our chests rose and fell in tandem. Above us, the stars stretched far into the pure black sky. They seemed to be shining brighter than ever.
A series of letters written from human Spamton to monster Tenna leading up to the Human-Monster War