#1
The Faults in Our Souls ~ Gaster x...by _T3chn0_
42.4K
1.4K
28
42.4K1.4K28"Do you not want to go back home? To the surface?"
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"No."
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"Why?"
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"Because my home i...
Completed
#2
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...
#3
Gaster's second chanceby Diamond3343221241
221241Classic 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...
#4
Undertale: giving soulby Author-Dayo14.9K67440
14.9K67440This 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
#5
Gaster x Reader- Not Your Faultby Singeroftales106K3.3K13
106K3.3K13You'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
#6
The Return(A Flowerfell Sequel)by Frisk20.6K71114
20.6K711143 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...
#7
Blaze of Nightby Anchestor6.9K24624
6.9K24624The sleepy town of Snowdin has some new arrivals: a little family of skeletons. The father, one doctor Gaster, seems to take a keen interest in Grillby. With how allurin...
#8
Undertale & Deltarune Oneshotsby Grimm10.3K22957
10.3K22957《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
#10
𝐔𝐧𝐝𝐞𝐫𝐭𝐚𝐥𝐞 𝐂𝐡𝐚𝐫𝐚𝐜𝐭�...by _-Natsumi-_374122
374122(𝐂𝐨𝐯𝐞𝐫 𝐝𝐨𝐞𝐬𝐧'𝐭 𝐛𝐞𝐥𝐨𝐧𝐠 𝐭𝐨 𝐦𝐞, 𝐂𝐫𝐞𝐝𝐢𝐭 𝐭𝐨 𝐚𝐫𝐭𝐢𝐬𝐭!)
𝐓𝐡𝐢𝐬 𝐢𝐬, 𝐚 𝐥𝐨𝐭 𝐨𝐟 𝐧𝐨𝐧-𝐜𝐚𝐧𝐨𝐧 𝐭𝐡𝐢𝐧𝐠𝐬, 𝐰𝐢𝐭𝐡 𝐚 𝐭𝐨𝐮𝐜𝐡...
#11
My Greatest Creationsby Sean593233
593233W.D Gaster creates what has never been done before.
A clone.
I made and drew the cover, Undertale doesn't belong to me.
#12
My little Star (Sans Afton AU) (Hi...by -_Sakura_-9921
9921Welcome to what has to be the most interesting and chaotic crossover story idea I have ever had.
Sans is an Afton in this, he somehow teleported to the Underground dime...
#13
New Home (Undertale Fanfic) (DISCO...by Astrile2692011
2692011The 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
#14
Meeting WD Gasterby writing noodles6K1514
6K1514Reader meets WD Gaster. Takes place before the monsters are freed from Underground. Enjoy.
Completed
#15
RebelTaleby CrazyCorbeau4332
4332RebelTale is a new AU created by me,so um,please don't steal also help me with tags cx
#16
W.D Gaster and the Great Mistakeby narknork432122
432122Gaster got drunk as hell, now surprise! He's a dad!
#17
Undertale One Shotsby Kachi Sertona299226
299226Lots of little one-offs and side things. Enjoy!
(No shipping included)
#18
bits of sansby!by Karmic695184
695184oneshots of sans and grillby being mega gay for each other :3
JUDGE ME
I DARE YOU
please read the a/n!
♪('ε｀ )
#19
gaster as a dad to sans and papyru...by bakudeku2911
2911Here are some cute baby sans and papyrus and there is gaster being a dad to them! ok enjoy this!
#20
Mobster Life...(MafiaTale!Sans x A...by BoreeseTheWolfGirl❤6101
6101You're the top Hitman in the BlackCat gang.Your latest mission is to infiltrate a monster gang,said to be the best at what they do.You are to pose as a mobster and stay...