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  1. Tags
    Summary

    Legends say that monsters live under the mountain and in the seaside swamp so dark and tangled the creatures there never see the light of day. Any curious child that has stumbled in has never made it back out.

    Language:
    English
    Words:
    11,460
    Chapters:
    5/?
    Comments:
    6
    Kudos:
    3
    Bookmarks:
    2
    Hits:
    66
  2. Tags
    Summary

    Kris unknowingly causes the Player to cross through the barrier between the Player's and Kris' worlds when they rip out their soul to relinquish control. The Player gains a semi physical form as they are forcibly sucked into the Deltarune world, and they find themself shoved into a corner in a familiar looking room...

    Language:
    English
    Words:
    18,314
    Chapters:
    10/?
    Comments:
    186
    Kudos:
    334
    Bookmarks:
    34
    Hits:
    5221
  3. Tags
    Summary

    Ever wonder why Sans and Papyrus never had their parents appear in their lives? Everyone else always wondered that. But there was a war, plenty of parents died during it. So did theirs. Right?

    They're back, and they can't wait to see their two sons and protect them from the world. It's a dangerous place out there, especially with murders going around.

    Papyrus is just happy to meet his parents.

    Sans really wants them to leave.

    And why won't they let anyone see what's in their basement?

    (Fontcest warning!)

    Language:
    English
    Words:
    45,257
    Chapters:
    18/?
    Comments:
    83
    Kudos:
    95
    Bookmarks:
    16
    Hits:
    2598
  4. Tags
    Summary

    Noelle would do anything to save her father. She's already lost too many people, she can't go through it again. She'll do anything. Even sell her soul.
    Berdly would do anything to not be alone again, to be remembered, to be important. He'll do anything. Even follow his friends to hell and back.

    Series
    Language:
    English
    Words:
    4,829
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    11
    Bookmarks:
    2
    Hits:
    202
  5. Tags
    Summary

    Born into a life of cruel subjugation and confinement, a young child discovers that a different kind of prison might just become her safe haven. But nothing is ever that simple. With a deadline looming and her troubles starting to pile up, a new friend with a lazy grin could be just what she needs right now.

    Language:
    English
    Words:
    144,723
    Chapters:
    65/?
    Comments:
    147
    Kudos:
    209
    Bookmarks:
    17
    Hits:
    4853
  6. Tags
    Summary

    No one knew much about the Masked Assassin, except for the fact if you paid a certain amount of gold, she was certain to kill whoever you desired to be murdered. No one knew what she was like, apart from Chara.

    For the Swapfell Universe, violence and murder is common. There is a hierarchy where only the strong survive. That was until their sudden appearance on the surface.

    It has been 4 years since then, and not everything is as pleasant as they all imagined. For [Y/N], all she knows is being alone, apart from when she takes care of or sees Chara each weekend.

    Language:
    English
    Words:
    901
    Chapters:
    2/?
    Kudos:
    17
    Bookmarks:
    3
    Hits:
    125
  7. Tags
    Summary

    A sequel set years ahead of the original Deltarune with many themes about gender, healthy vs unhealthy relationships, healthy expressions of kink and a shocking amount of dick. Dark Fountains sealed and ancient malice dispersed, the heroes won the day. But the cost to them is clear, their sins crawling on their backs and the loss festering in what remains of their SOULs. As they struggle to recover from their wounds, with the strings of destiny lying limp in the past, they must choose for themselves who they are and who they want to be.

    Far from Hometown a lone human girl looking for humanity's lost history resolves to explore a mountain, and winds up thrust into the midst of a story long since over. Will her selflessness help to heal, or will her selfishness only cut deeper?

    It's also immensely self indulgent and personal to me so idk whatever just enjoy it or don't lol

    Oh yeah it also has tons of hot monster [#$@!] with huge [pipis] and a lot of other [HYPERLINK BLOCKED]

    This is the 'all chapters in one story' version for people who prefer that. If you want to avoid certain kinks or w/e the series page can be found here: https://archiveofourown.org/series/2552605

    Language:
    English
    Words:
    175,574
    Chapters:
    14/?
    Comments:
    11
    Kudos:
    20
    Bookmarks:
    3
    Hits:
    3055
  8. Tags
    Summary

    DIRECT SEQUEL/EPILOGUE TO “PATCHWORK SOUL” — 3 months later. A family of monsters and their little human kid try to start life anew beyond the confines of a giant mountain. Maybe they find something. Maybe they lose something. Time flows ever onwards, but sometimes it goes sideways, and it's heavier than they thought.

    [Please read PATCHWORK SOUL, know all major canon timelines, and the music of Undertale before reading for the best experience.]

    [An extended AU of what happens after a specific time kid's True Pacifist ending.]

    Series
    Language:
    English
    Words:
    814,346
    Chapters:
    78/?
    Comments:
    460
    Kudos:
    289
    Bookmarks:
    22
    Hits:
    16389
  9. Tags
    Summary

    What if Kris was never adopted by the Dreemur's and was instead put into foster care.

    Kris is placed in Hometown due to an incident at Kris's last foster home and ends up in an abusive household. He befriends his foster sister Susie and try to make do with what they got.

    Originally Posted on 4chan

    Language:
    English
    Words:
    12,443
    Chapters:
    7/?
    Comments:
    5
    Kudos:
    33
    Bookmarks:
    3
    Hits:
    486
  10. Tags
    Summary

    Chara is dead. They’re quite sure of that. So why does everyone keep insisting otherwise?

    A somewhat different take on Chara, with emphasis on their relationship with Frisk and Asriel. Contains light established Sans/Toriel and Frisk/MK.

    Series
    Language:
    English
    Words:
    13,103
    Chapters:
    8/?
    Comments:
    3
    Kudos:
    24
    Bookmarks:
    1
    Hits:
    637
  11. Tags
    Summary

    30 prompts!
    Exactly-100-word drabbles!!
    PAPSCAPS!!!
    Papyrus and Reader forge an unbreakable bond and fill these prompts in the harrowing crucible between Friendship and Romance! Action! Drama! Mutual Respect! Love of Pasta! Deadly Spikes!! The Gauntlet of Deadly Terror!! Pottery Class!!!!
    (This is technically the sequel to When Words Get Broken, but can be read alone!)

    Series
    Language:
    English
    Words:
    700
    Chapters:
    7/30
    Comments:
    14
    Kudos:
    47
    Bookmarks:
    1
    Hits:
    345
  12. Tags
    Summary

    Sunny wakes up in the cold woods when just a few moments ago he was in his house? Where is he now, and can these strangers help them?

    Noelle just wanted to go for a peaceful stroll in the woods near the bunker at night. What she didn't expect was a lost human child.

    Language:
    English
    Words:
    54,284
    Chapters:
    26/?
    Comments:
    447
    Kudos:
    442
    Bookmarks:
    45
    Hits:
    11225
  13. Tags
    Summary

    "The universe and its sciences have always been a finicky thing. Laws discovered and written down. Certain rules set in place. Despite the world of magic that he lives in, even possessing magic of his own, there’s a uniqueness to logic and how it manages to touch everything. Although, when he met another version of himself, logic had been metaphorically thrown out his lab window."

    The multiverse is headed towards peril, according to the watcher of the multiverse, and he's a center pawn.

    Why is Core so insistent on directing his path?

    What mistake is he supposed to avoid?

    (ROUGHLY 95+ CHAPTERS, PLOT/CHAPTER COUNT IS SUBJECT TO CHANGE)
    (Very slow burn fanfic, there's going to be a lot of sadness, but the happy moments are wholesome, although spread far and few.)

    (Trigger warnings in beginning notes of each chapter.)

    Series
    Language:
    English
    Words:
    73,030
    Chapters:
    51/?
    Comments:
    56
    Kudos:
    88
    Bookmarks:
    19
    Hits:
    2913
  14. Tags
    Summary

    Living, in Chara's opinion, is highly overrated. Humanity seems determined to prove them right.

    Language:
    English
    Words:
    4,501
    Chapters:
    10/?
    Comments:
    27
    Kudos:
    37
    Bookmarks:
    5
    Hits:
    835
  15. Tags
    Summary

    In his quest for the perfect pacifist ending, Frisk doomed all but one timeline before finally achieving his happy ending. Such actions are not without consequence, and he and his friends are given a monumental task that will take them across the world in order to save the universe. A universe that he single-handedly ruined. Along the way, they will uncover secrets not desired to be known, battle creatures that should not exist, and awaken forces older and more powerful than thought possible.

    (If you haven't guessed by now, this is extremely AU, and I will take full advantage of my position as conductor of this stupid adventure to fling the train off the tracks of canon and fly it straight into a ravine twenty kilometers away.)

    Language:
    English
    Words:
    5,876
    Chapters:
    2/?
    Kudos:
    4
    Hits:
    82
  16. Tags
    Summary

    Sans loves you. Almost too much. He has played the timelines with you enough that he knows how it ends. His only goal this time is to get that happy ending he knows exists. After all, it's not everyday someone falls in love with you. It's also not every day that someone has a soul trait so rare that it's only spoken about in legends of old - a soul that reflects someone else’s in every shape and form when they become close enough. But what if that soul decides that a certain skeleton is the only one that it wants?

    Language:
    English
    Words:
    4,100
    Chapters:
    2/?
    Kudos:
    13
    Bookmarks:
    4
    Hits:
    132
  17. Tags
    Summary

    The School Frisk attends has tons of hijinks almost every day, especially the pta.

    The Monsters have resurfaced, and established themselves once more. An attempt at Peace between races has been made, albeit a little shakily for now.

    Frisk and Co. Hope that one day, both monsters and humans will be able to live in harmony for real.

    Language:
    English
    Words:
    14,966
    Chapters:
    5/?
    Comments:
    2
    Kudos:
    16
    Bookmarks:
    4
    Hits:
    371
  18. Tags
    Summary

    A faulty Reset sends a wannabe gamer spiraling into the world of Undertale where she has only her memories of the game, her wits, and a healthy dose of sarcasm to help her survive until the end of the game. Self-Insert as Frisk. No romance except for what’s canon. Plenty of fourth-wall breaks.

    Language:
    English
    Words:
    166,849
    Chapters:
    39/41
    Comments:
    60
    Kudos:
    171
    Bookmarks:
    25
    Hits:
    5227
  19. Tags
    Summary

    For Monsterkind, the Surface represented freedom.
    For Frisk, it's a return to some uncomfortable realities.
    It all began with a simple wish. When that wish faded, Frisk tried to move on.
    Except, 'moving on' was not so simple. Emerging from the Underground had put them in a worldwide spotlight.
    From an unknown child, they had become an icon of great value.

    'The Golden Quiche'

    What to expect from this story:

    -Mystery Drama
    -Anime
    -Extensive Surface Worldbuilding
    -Expanded History and Backstory
    -Magic System
    -More Magic
    -Both new and old people.
    -Feels.
    -Gambits.

    What to not expect from this story:

    -Toby Canon.
    -Commonly agreed headcanons (especially about a certain scientist and Frisk's gender)
    -Slice of life. This is definitely not that.

    This work comes with its own magic science lore in the form of The Magus Compendium

    Art blog
    Discord

    Language:
    English
    Words:
    840,845
    Chapters:
    222/?
    Collections:
    6
    Comments:
    6938
    Kudos:
    3418
    Bookmarks:
    355
    Hits:
    135885
  20. Tags
    Summary

    Chara is horrified by what she had seen of frisk on the genocide route. She can't believe how much frisk pretends that everything is normal dispite her actions.

    Language:
    English
    Words:
    646
    Chapters:
    2/?
    Kudos:
    6
    Hits:
    87

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