#1
Undertale a New Monster is Hereby Why_Is_It_Spicy
Y/N was just your normal every day monster in the underground, well. That's what he thought at least before meeting the human. Join Y/N in his adventure with the human i...
#2
Fallen Angel(Gaster x Reader) REWR...by Big Simp
(Cover drawn by me)
The angels weren't supposed to pick sides. They were created for one reason and one reason alone.
Protect the humans from any threat.
There was no su...
#3
The Comedians Mask -Undertale *Dis...by Dyell
Sans is a comedian, telling puns and playing pranks is part of who he is. Or is it? Resets, his parents deaths, and bringing up his brother alone has all taken its toll...
#4
Soul of a Weaponby Kyran Wolfe
What if Sans only got Papyrus away from Gaster? What would happen if Alphys found him trapped years later? Can they teach him to be a normal monster, or will he forever...
Completed
#5
Welcome to Underhigh. Underhigh x...by Kath W
WARNING: STORY HAS VIOLENCE
(Y/N) is a young 17 year old who goes to Underhigh, the biggest high in the multiverse. (Y/N) had no friends and a bad past. She's smart thou...
Completed
#6
A new start? (Undertale x BNHA)by Dragon17122
Sans is brought to the world of BNHA. He wakes on the roof of UA.He'll meet new friends and enemies, old and new. But will he ever get over the jar, filled with his bro...
Completed
#7
Undertale Fallen Determination: Bo...by Cobalt Gemini (Jacob Zorn)
What happens when the Fallen Child is not the one to take their life to pass the barrier? After the death of her brother, Chara, escaping her father's anger, finds herse...
Completed
#8
Can I take you to Dinner? Mafi-fel...by MissHoll-E-Socks
"How rude, not even gonna ask for a name??" He teased. "Why are you here?" You glowered, raising the whisk. The skeleton scoffed: "Well, glad yo...
Completed
#9
Lost Sister (Discontinued)by ThatGuyHails
This is another Undertale fanfiction. This time, it's about Sans and Papyrus's long lost sister! None of the pictures or videos in here belong to me.
#10
Orange soul (Male Reader X Female...by Skelo-tain
I take no credit for anything in my book. All rights are reserved to the original creaters of undertale.
I also take no credit for the art work in my book. All credit g...
#11
Connected to the Different [ Glit...by Kono Matsura
When Dr. W.D. Gaster fell into his creation, he couldn't use his powers inside the void. What if it wasn't lost, but given to someone else?
Meet Lukas Reeves, a normal...
#12
Submersion.by pixelyman
The royal scientist. A person of great mind and high respect. An individual that could never possibly make a mistake.
But what happens when an obsession with human souls...
#13
Killing the Moodby Zero Time Void
Reincarnated as Killer Sans but a bit different. First getting reborn and then thrown into a trap AU. Too bed the MC is a genius. (Pun intantional) How that works while...
#14
Living With Little Gastersby Melody-Sapphire
The Gasters have lived in the void for too long, they come up with a spell they believe will send them all back to their homes, or at least a universe less.....empty per...
#15
Forgiveness... (A Greyster story)by busy Izzy
Miss Grey would try and try again for Gaster's forgiveness but he wasn't keen on forgiving her but one day she gives up on asking for forgiveness and It becomes where sh...
Completed
#16
Light in the Dark (Gaster X Reader)by Kyran Wolfe
He went blind in a freak accident at the lab. Now all he 'sees' is darkness. Until.. he meets you.
Completed
#17
To the Boneby GhostFang
It had been six months since Jaune Arc dissappered from the face of Remnant.
It has been four years since Monster Kind had been freed from the Underground.
On Remnant 7...
Completed
#18
I'm Handplates Gatser?!by Pixel birds
A person named Daz die by a gun shot to the head and now he is handplates Gaster.
Daz soul used to be a really strong Kindness, but when he died and his soul shattered t...
#19
Darkness' Eternal Bride (Gaster x...by everail
WARNING: THIS CONTAINS HIGHLY MATURE CONTENT (BLOOD, VIOLENCE) READ AT YOUR OWN RISK
Money can change a lot of things.
It can even change your destiny.
Plunge yourself i...
Completed
#20
The consequences...by Your average fella
"... Heh how pathetic this world is... everyone beated me... abused me... neglected me... But now when i have POWER they don't dare to do it... cowards..."
Rwb...
Completed