1 - 20 of 31 Works in Underfell W. D. Gaster

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  1. Tags
    Summary

    The balance within the world was now broken, but as with such universal constants it always finds a way to right itself through natural means. A balance of magic and science is required. The humans prior tried to exterminate the existence of magic to no avail. Every death of a mage would bring forth another as the magic buried itself deep into a new soul creating latent abilities in a chosen human child. The Seven: justice, bravery, patience, kindness, perseverance, integrity, and DETERMINATION would live on. If one perished then the magic would attach itself to another chosen soul. The lone town that knew the truth of their past was their only sanctuary. A place for them to escape from those that wished them harm, but absolute power corrupts absolutely and thus this is how our story… begins.

    Frisk clambered up the mountain. The mountain of so many horror stories, myths, and legends. She refused to be frightened by such things, but her heart was still racing as she ascended the peak of Mt. Ebott. It was rumored to be the home of bloodthirsty monsters that were cast into the mountain as punishment for their loss against humanity. It became nothing more than a scary story. Her hands convulsed when she prepared to jump.

    Series
    Language:
    English
    Words:
    142,484
    Chapters:
    21/?
    Comments:
    22
    Kudos:
    52
    Bookmarks:
    11
    Hits:
    2387
  2. Tags
    Summary

    Sans had gotten used to the experiments and tests done by Doctor W.D. Gaster. Then he was introduced to a younger monster. What he would do to keep him happy and safe starts to scare him, but he's never been good at being in control.

    Language:
    English
    Words:
    1,426
    Chapters:
    3/?
    Kudos:
    11
    Hits:
    105
  3. Tags
    Summary

    Sans was Gaster’s guinea pig, but now the Royal Scientist needs a new subject. Sans won’t back down easily, as Gaster sets his sights on the twins.

    Language:
    English
    Words:
    1,194
    Chapters:
    1/1
    Comments:
    6
    Kudos:
    30
    Bookmarks:
    2
    Hits:
    188
  4. Tags
    Summary

    It was a simple slip up... A slip up that caused her to fall down into the mountain. Now she wakes up in a completely different world than the one she was used to and to top it all off she has to try and get along with everyone while trying to keep her mind in check.

    Language:
    English
    Words:
    5,845
    Chapters:
    6/?
    Comments:
    14
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    286
  5. Tags
    Summary

    Years after the barrier is broken and an inter-universal portal is set up, monsters and people from other AU's visit Underlust and have a good time at the Strip Club in Snowdin.

    Language:
    English
    Words:
    62,291
    Chapters:
    16/?
    Comments:
    28
    Kudos:
    26
    Bookmarks:
    2
    Hits:
    1829
  6. Tags
    Summary

    A series of Gaster-centric one shots.

    Latest chapter:

    Just another day in keeping the father of your child under control.

    Language:
    English
    Words:
    18,329
    Chapters:
    13/?
    Collections:
    1
    Comments:
    85
    Kudos:
    276
    Bookmarks:
    21
    Hits:
    3887
  7. Tags
    Summary

    Tired of seeing his children suffer in underfell Gaster does something cruel to the swap bros.

    The swap brothers now find themselves thrown into a world of kill or be killed with their dark copies watching their every move. It is unsure if they are friends or foe.

    Language:
    English
    Words:
    58,592
    Chapters:
    25/?
    Comments:
    4
    Kudos:
    112
    Bookmarks:
    11
    Hits:
    1488
  8. Tags
    Summary

    Underfell Version of Undertail University’s Lesson Series.

    In order for monsters to breed, they need a consenting partner.

    Doctor Gaster decides to teach lessons to his fellow monsters about how to breed humans to create fantastic hybrids... but he can’t find any human volunteers.

    Instead, his team captures, tortures, and breaks the souls of humans until they accept their new role as breeders. Broken humans have become a lucrative business for him and his classes are sold out, standing room only.

    Series
    Language:
    English
    Words:
    1,121
    Chapters:
    1/1
    Comments:
    11
    Kudos:
    55
    Bookmarks:
    3
    Hits:
    1810
  9. Tags
    Summary

    Papyrus wasn't always The Great and Terrible Captain of the Royal Guard. Sans wasn't always a nervous mess who could hardly summon his magic. Here we see the rise of one brother and the fall of the other.

    ***ON HIATUS UNTIL FINALS ARE OVER***

    Series
    Language:
    English
    Words:
    12,157
    Chapters:
    3/?
    Comments:
    21
    Kudos:
    45
    Bookmarks:
    8
    Hits:
    687
  10. Tags
    Summary

    Drabbles that started as a result of asks on my Tumblr, gathered here with their titles as the chapters. Each one will have the request in the description so you know what you're getting into. There are also the drabbles from the Drabble Donation Drive of 2017! Please note that I am no longer taking requests. Please visit My Tumblr for more stories and fun stuff!

    Language:
    English
    Words:
    156,870
    Chapters:
    220/?
    Comments:
    1236
    Kudos:
    1233
    Bookmarks:
    107
    Hits:
    33369
  11. Tags
    Summary

    UF!Sans has given birth only a month a go to a healthy daughter, Frisk. Just one problem, she is a human. He doesn't care, she is his little star-light, he adores her. Even Papyrus is fond of her. The rest of Snowdin is not so understanding, and Sans escapes from a murderous mob to the Cursed Ruins as his brother holds of the mob. He makes it, and the Cursed Lich Gaster allows him entry. Sans is immediately smitten by the imposing Lich, but all the stories and legends of the ancient being are horrifying and told in hushed whispers to keep children in line. But surely they are not true? Sans is a bout to find out.

    Based of RP on Tumblr with @tempestjewelsin

    Language:
    English
    Words:
    101,975
    Chapters:
    19/?
    Comments:
    100
    Kudos:
    253
    Bookmarks:
    23
    Hits:
    13813
  12. Tags
    Summary

    I’m angry and so I’ll use this to poor it out. In this underfell timeline (before frisk) no one knows that Sans is worth anything. He keeps his magic a secret but with that everyone thinks his a “weak” monster and the only thing keeping him alive is his brother. Oh, and I changed up the language to better suit this AU. so there will be some curse words.

    Language:
    English
    Words:
    7,016
    Chapters:
    7/?
    Comments:
    27
    Kudos:
    71
    Bookmarks:
    6
    Hits:
    1083
  13. Tags
    Summary

    Kinktober is coming up in a couple of months and I felt like an early start would be a good thing!

    Series
    Language:
    English
    Words:
    4,197
    Chapters:
    7/31
    Comments:
    58
    Kudos:
    167
    Bookmarks:
    29
    Hits:
    9433
  14. Tags
    Summary

    Papyrus has a present for Sans.

    Language:
    English
    Words:
    1,892
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    34
    Bookmarks:
    3
    Hits:
    413
  15. Tags
    Summary

    USPaps finds himself stuck with a certain Underfell duo.

    uspaps/ufpaps

    Language:
    English
    Words:
    3,538
    Chapters:
    3/?
    Comments:
    6
    Kudos:
    29
    Bookmarks:
    4
    Hits:
    414
  16. Tags
    Summary

    An Underfell Verse with a touch of horror, a lot of gore, and an explicit amount of dark desires. You are a green soul tortured by your past, present, and probable future. Cursed with an inability to die from mortal wounds, you become the target of malice, curiosity, and lust while trying to survive this twisted world of monsters. Be careful you don't become twisted yourself.

    Warning: this is my own personal rendition of the Underfell Crew: dark, terrible, and without restraint - and that includes Reader... eventually. This is not a fic for everyone. Please heed the warnings and tread lightly.

    Language:
    English
    Words:
    4,616
    Chapters:
    1/?
    Comments:
    11
    Kudos:
    47
    Bookmarks:
    6
    Hits:
    721
  17. Tags
    Summary

    Sans is the consort of the pharaoh, Gaster - displeased with his way of life but finding that he has caught the wondering eye of the new General Papyrus. How long will they be able to keep their illicit affair a secret?

    pharaohverse fanart and other undertale stuff found at:
    otherangela.tumblr.com

    Series
    Language:
    English
    Words:
    44,507
    Chapters:
    17/17
    Collections:
    1
    Comments:
    270
    Kudos:
    571
    Bookmarks:
    58
    Hits:
    8681
  18. Tags
    Summary

    Taking place ten years after monsters had arrived on the surface, monster/human relations still haven’t gotten better. In a last-ditch effort, the King and Queen of monsters decided to arrange a marriage between their ally’s daughter, Hannah, and a skeleton noble, Sans Gaster. Unknown to her, this isn’t their first time meeting, they’ve met, but in past timelines.
    This time Frisk promise no more resets unless it’s necessary. Sans would finally not only meet, but wed the object of his obsession. And now that he finally has her there’s no way he’s going to let her go without a fight.
    (AU: Underfell)
    So I've been reading some stories labeled as 'same reader different timeline' so I wanted to try one so same Oc different AU.

    Series
    Language:
    English
    Words:
    1,801
    Chapters:
    1/1
    Kudos:
    22
    Bookmarks:
    1
    Hits:
    347
  19. Tags
    Summary

    When a child finds another friend, they tend to want to share.

    Series
    Language:
    English
    Words:
    286
    Chapters:
    1/2
    Comments:
    9
    Kudos:
    56
    Bookmarks:
    5
    Hits:
    684
  20. Tags
    Summary

    Sans is tired, a moment away from simply giving up and Falling Down; but then he finds out that his beloved little brother remembers their father Gaster; and not only that, but reciprocates Sans' love! He'd never been so happy! But it is not so easy, because Papyrus has reoccurring nightmares about the tortuous experiments their father inflicted upon him as a child, and he keeps waking up to find holes in his hands...Gaster just can't leave well enough alone, and he has plans for his sons...

    Series
    Language:
    English
    Words:
    42,875
    Chapters:
    12/?
    Comments:
    59
    Kudos:
    164
    Bookmarks:
    19
    Hits:
    5482

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