1 - 20 of 212 Bookmarked Items in Ecto-Tentacles (Undertale)
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You honestly can't remember when you had officially moved into the lodge to be with your datemate. It started as leaving things in his room under the (flimsy) excuse of having stuff for the next time you have an impromptu sleepover—but it was a not-so-subtle takeover.
The others didn't mind it either and were gracious enough to provide you with your own room for when everyone's shenanigans prove to be too much for you, but little did they know that they practically invited the devil herself into their home, because you're the queen of starting some bullshit or doing things for the bit.
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Bookmark Notes:
My lovely friend Liliths work <3
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You're just a standard New Yorker: you work hard, you make shit money, you take care of your sickly younger brother. And you happen to work for the De Luca Family- the most powerful mob family in your borough. As if that wasn't enough- enter the political minefield of entering a relationship with a Monster. Nothing goes as planned, your (eventual) datemate is more than he seems, and it turns out, so are you.
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The king has fallen.
In the devastation left in the human's wake, a new king is needed. Papyrus steps up to the challenge, assisted by his brother.
Sans is sworn to obey the crown, bound by the Delta Rune. Regardless of who wears it.
But when dark alternates show up and threaten war, Papyrus has to make the hardest decision of his life, and Sans finds out the chains that bind him might not be as secure as he'd like.
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It’s fun being dead.
Or undead, rather, as your sister likes to correct you. Your dear sister is the kind of person who took her dark arts very seriously. Or, her necromancy, rather. You’ll be the first to admit, you don’t know a lot about her school of magic. She doesn’t know much about yours either, but it’s always enjoyable to discuss magical theory with her. She says it’s not her specialty, but she tends to under credit herself.
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- Words:
- 55,113
- Works:
- 4
- Bookmarks:
- 10
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Bookmark Notes:
Intrigued, invested, no sleep whatsoever
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Error and Nightmare both have a fascination with the same human... you.
You're aware that your world is nothing more than code, and it irks you, deep inside.
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Kinktober 2022-The Dumpster Fire Edition by RubyDracoGirl
Fandoms: Undertale (Video Game), Deltarune (Video Game)
21 Sep 2023
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Summary
Hey ya'll. It's ya girl, Ruby, coming back for a round three of Kinktober. Am I here to fuck some skeletons (and maybe other Undertale monsters) for a month straight? Hell yeah, I am! And just like the previous times, I am completely unorganized and mildly unhinged =)
- Language:
- English
- Words:
- 85,968
- Chapters:
- 22/31
- Comments:
- 185
- Kudos:
- 1,084
- Bookmarks:
- 136
- Hits:
- 43,665
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15
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Summary
A series of SFW + NSFW drabbles/oneshots relating to the Bad Sans Gang being gay and in love with each other.
THIS CONTAINS MATURE ADULT CONTENT
- Language:
- English
- Words:
- 38,670
- Chapters:
- 52/?
- Comments:
- 319
- Kudos:
- 1,186
- Bookmarks:
- 97
- Hits:
- 33,885
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It’s a very… delicate time of year. Or so you’ve been told; you can’t say for certain that you’ve ever been around a monster during their Season. Your stay at Nightmare’s castle has certainly prepared you for all manner of strange and unusual occurrences, but this?
This is a whole different beast.
Series
- Part 2 of PROPAGANDA
- Language:
- English
- Words:
- 24,927
- Chapters:
- 4/?
- Collections:
- 1
- Comments:
- 152
- Kudos:
- 538
- Bookmarks:
- 115
- Hits:
- 14,373
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The Sacrificial Skeleton and the Labyrinth of Gods by this_is_my_alt
Fandoms: Undertale (Video Game)
28 Sep 2025
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Summary
As a necromancer, you’re used to suspicious stares and whispers of heresy from the townsfolk. It only gets worse after you’re killed and walk Ebott Empire as an undead skeleton. When you hear rumors of a strange settlement that worships the undead, it’s too tempting to resist. The locals treat you better than you’ve ever been treated. That is, right until the moment where you’re dressed up and tied to an altar as a sacrificial bride for their skeleton gods.
Despite their advanced technology and magical prowess, you’re doubtful of their divinity. What kind of gods blush whenever they see a bit of bone?
- Language:
- English
- Words:
- 239,418
- Chapters:
- 50/60
- Collections:
- 1
- Comments:
- 1,181
- Kudos:
- 2,419
- Bookmarks:
- 486
- Hits:
- 84,369
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Summary
Tentacles and oviposition. You don't need to know more...
Series
- Part 9 of Kinktober 2017
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Bookmark Notes:
12th Kinktober - Tentacles by orphan_account
Summary:
Tentacles and oviposition. You don't need to know more...
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Summary
Cross gets a little carried away while Nightmare and Dream feed from him and the twins are determined to make their little puppy feel good. Killer is a little minx and comes running towards Cross' aroused scent, leading to Nightmare and Dream taking care of both of their wolves~.
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Bookmark Notes:
Triple T(h)reat by TsunaidaMay
Summary:
Cross gets a little carried away while Nightmare and Dream feed from him and the twins are determined to make their little puppy feel good. Killer is a little minx and comes running towards Cross' aroused scent, leading to Nightmare and Dream taking care of both of their wolves~.
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Summary
Не такое уж и далёкое, как может показаться, будущее. Люди азартно заменяют свои тела на бионические, вся жизнь проходит в виртуальном пространстве, а секс в реальности считается чем-то пошлым и отсталым, поэтому повсеместно то тут, то там начали появляться виртуальные секс-клубы, дающие тебе полную свободу в фантазии и самовыражении.
Таким образом Ван Ибо и Сяо Чжань знакомятся, но Сяо Чжань не знал, что Ибо - приверженец "старой школы")Ксюше, которая завела однажды интересный разговор и тем самым вдохнула в слабенькую задумку жизнь.
А также каналу "Бионическая Россия", откуда я черпала теорию и много всего интересного.-
Bookmark Notes:
Не читано
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Summary
Nightmare is more than just a bad guy. He and his poly protect others, too. Maybe they can help Blue out of a bad situation.
Series
- Part 9 of Underswap #832
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Each chapter will have a list of kinks as well as the pairing for that chapter. Tags for the collection will change as new chapters are added. Enjoy!
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Sans gives in to the temptation to paddle the pink canoe one night in an inappripriate venue and then pretty much just keeps making bad decisions. Papyrus is surprisingly onboard.
Series
- Part 1 of Euphemisms
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Bookmark Notes:
I WAS ON THE EDGE OF MT SEAT THIS IS SO GIOD
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What Happens in Space Vegas (Never) Stays in Space Vegas by Acoustic_Meatus
Fandoms: Undertale (Video Game)
28 Sep 2025
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Summary
Sans and Red's semi-annual weekend bender in Space Vegas takes an unexpected turn.
Or, the boys wake up in the aftermath of a hasty Space Vegas Wedding and consistently fail to make any wise decisions.
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Bookmark Notes:
Good shit.
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Summary
Mermaids are the social butterflies of the sea, living in sunny, shallow water together with the rest of their school. On the other end of the spectrum, meroctopuses are violent, antisocial fucks who like the cold and the dark, and who basically kill any competing predator they see.
But they aren’t stupid.
Red is proof of that, using his traps to hunt for food and saving his energy to ward off predators. So, how does he react when he finds the laziest creature in the ocean stealing his catch?
Bribe him with more food in exchange for peaceful company, of course! The ocean is fucking lonely for giant predatory mer!
Red unwittingly gets saved by those peaceful conversations. Apparently even a cold-hearted predator can fall in love. And from there, their family keeps growing as more lost souls are saved by the siren’s call that sings of peace, love, and family, no matter how terrible of a monster you were in the past.
- Language:
- English
- Words:
- 225,104
- Chapters:
- 77/?
- Collections:
- 1
- Comments:
- 2,073
- Kudos:
- 1,827
- Bookmarks:
- 312
- Hits:
- 52,557
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Summary
Horror's experience with gaster fucked him up forever
I'm probably just gonna continuously add shit about horror being fucked By gaster here so ya
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Exacting Their Revenge: An Undertale Fanfiction (Echotale Gaster!Sans X Cannibalistic Holocaust Reader) by orphan_account for
Fandoms: Undertale (Video Game)
17 Jan 2020
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Summary
Your stomach rumbled. Making you move ever so slightly. It was nearing your feeding time anyway. You ever so slightly lifted your head off of your battered arms to give an ice cold glare to the glass window that separated your room to the rest of the asylum. The glare you were currently giving the window was one of those glares that could render a full grown man helpless. You smirked once more at that thought. Though this time, your smirk was plainly visible to the people currently monitoring you from the safety of the other side of the glass window you were currently looking at. That's right. They were safe from you with being on the other side of the glass.
Things to look out for:
~ Blood and gore
~ Mentions of violence
~ Cannibalistic notions
~ Horror topics
~ Upcoming intimate scenesWARNING: This story is very graphic, and not for the faint of heart! There are mentions of upcoming rape scenes, graphic depictions of violence, profanity, and a whole lot of blood and guts. This is rated M for a reason. If you have not already read the summary for this fanfiction, I highly suggest that you do. You have been warned, read at your own risk. This is geared for mature audiences only.
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Bookmark Notes:
dude... im not even tryna read this... but the SHEER amount of tags... oh god the tags... how does one even THINK of all these... ... i need to put it in my schedule to read all these because WTF BRO
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