#1
Undertale & Deltarune Oneshotsby Grimm
13.2K
245
57
13.2K24557《Requests Closed》
Just a collection of Undertale and Deltarune oneshots, will also include AU's and x reader's
[Disclaimer: I don't own Undertale, Deltarune, or any of t...
Completed
#2
The Time Before (Undertale)by ANinnyMouse42367K20.7K59
367K20.7K59~o0o~ Book 1 of the "Better Times" trilogy ~o0o~
(Book two: "A Name to Remember")
(Book three: "No One is Happy with This")
There was a tim...
Completed
#3
A New Lifeby Grimm1.1K6514
1.1K6514《Handplates & Dadster AU》
A new AU appeared in the multiverse, one that is running at the same time as the rest, but it's drastically different than the others. It becam...
Completed
#4
The Faults in Our Souls ~ Gaster x...by _T3chn0_46.4K1.6K28
46.4K1.6K28"Do you not want to go back home? To the surface?"
°°°°°°°°°°°°°°°°
"No."
°°°°°°°°°°°°°°°°
"Why?"
°°°°°°°°°°°°°°°°
"Because my home i...
Completed
#5
Undertale: giving soulby Author-Dayo17.4K78040
17.4K78040This is a story before the last human fell around the time Chara was still alive and well. Humans were not being hunted till the adopted prince's passing, however with a...
Completed
#6
Gaster x Reader- Not Your Faultby Singeroftales107K3.3K13
107K3.3K13You're a human who has fallen down into the underground. There you meet a certain skeletal scientist and his sons. Will you get close to the family or will you become th...
Completed
#7
The Return(A Flowerfell Sequel)by Frisk20.9K71114
20.9K711143 years had passed since Frisk sacrificed herself to free the monsters.
Now humans and monsters live together on the surface, though some monsters preferred staying in...
#8
Dr. Gaster & Mr. Black (Undertale...by "𝘏𝘰𝘸 𝘥𝘰 𝘺𝘰𝘶 𝘸𝘳𝘪𝘵�...7746416
7746416An Undertale twist on the classic "Jekyll and Hyde" Broadway musical. After having been rescued from the depths of the Void, Dr. Gaster resumes his role as Roy...
Completed
#9
Gaster's second chanceby Diamond3343253251
253251Classic sans had hid a very dark secret about his father's disappearance Destiny had intervened her child suffered for so long as had classic gaster so she decided to gi...
#11
How To Be A Dad (Undertale Fanfic)by liberated hoe5.8K1747
5.8K1747(Short Story)
Gaster have made an experiment and made a very amazing experiment. Two lives, in the hands of Gaster.
The problem is . . .
He didn't know how to take care...
#12
New Home (Undertale Fanfic) (DISCO...by Astrile2712011
2712011The monsters get back to the surface once again. Although everything is great at first but tensions between the human race and monster race begins to rise. (Idk what to...
Completed
#13
Don't have to hideby WDTanukiii455101
455101This is a story created by Thebombdiggity 666 (it can be founded in deviantart and Tumblr) and it's a comic. This is a short story written by coldphoenix that can be fo...
#14
What Will I Do With My Heart?by Robin Minit3.1K11816
3.1K11816Gaster and Grillby are both unsure of what they would do if they lost each other, but they are soon to find out.
#16
Within The Barrier (An UnderTale F...by GuessThatWeeb2.6K23513
2.6K23513Monsters have lost. Surrendered at the hands of the enemy. They've been locked away underground in a cavern system under Mount Ebbot. No sign of getting out. How will th...
#17
Historyby Star Rose Colors32.7K1K33
32.7K1K33For years, Aliza has wondered about her real family. Now a clue in an old picture, the only thing left of her mother, finds Aliza climbing Mt. Ebott. In this twisted new...