1 - 20 of 137 Bookmarked Items in Sans is Having a Bad Time (Undertale)
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Or: The one where an adult Frisk wakes up after their funeral, back at the beginning of everything. Of course, they know how to navigate all their adventures underground, but... Does anyone want to tell them what kind of sin they committed? After waking up each time, in different timelines, some of which they even know they generated, and others that they themselves didn't commit? Yeah, this isn't going to happen (it happens anyway).
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- Part 3 of Random Writing
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Bookmark Notes:
3
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3
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You’re young. You marry the wrong man.
You wish you were dead.
Be careful what you wish for, Seven.
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Or, you find yourself Underground surrounded by starving, tortured monsters who know you're the last soul needed to attempt to break the barrier again. You said you wanted to die. Don't back down now.
Series
- Part 8 of How To Be A Human Being
- Part 9 of I/Me/Myself
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5
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Sans is willing to do anything to make sure Papyrus gets to live a semi-normal life for at least a little while.
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- Part 1 of Gossip Merchant
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There was no hope.
There was no way out of this place. Sans knew that from the depths of his soul- he couldn't escape on his own. But without any way to contact anyone and no knowledge of where he's trapped, all he could do was try to survive... or maybe just hope for death.
No more resets, after all.
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Spending Spring Break Underground by 4Trixs_Animations3
Fandoms: Undertale (Video Game), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
30 Oct 2025
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Summary
Once upon a time many centuries ago, the world was ruled by two species: Humans and Monsters. Both of these creatures thrived together using their special talents to help one another. That was until the humans declared war on the monsters out of the blue. This led to the monsters to be banished beneath a mountain.
But rest well when I say the humans suffered their karma. Without monsters they soon lost their magic, along with their way of life. They developed their own powers called quirks, with this power came the raise of heroes and villains. Quirks were quick to spread until only 20% lacked them.
It wasn’t long before magic and monsters were reduced to legend. This led many to climb the mountain to see if the legends were true, only to never return. This was because of the heartbroken monster king who put a bounty on every human who fell.
When the last human fell, the monsters were ecstatic. Finally they’ll be free to wander the surface and feel the sun and the rain again! But unbeknownst to them, they have become even more trapped than they had before. With each reset the monsters were forced to live the same day over and over without anyone knowing ... .Well, almost everyone.
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Bookmark Notes:
Ch 10
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Bookmark Notes:
Chpt 10
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Half-Tale: The Fallen by HolmesJaw
Fandoms: Undertale (Video Game), Half-Life (Video Games)
15 Nov 2025
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Summary
Corporal Adrian Shephard, a US Marine Corps soldier assigned to the HECU division, was sent off to Black Mesa for 'cleanup duty'. Despite the hell he went through, the marine somehow manages to escape the dangerous, alien-ridden facility against all odds and, after being 'detained' by the ever elusive G-Man, is then assigned a new mission many years later... to the UNDERGROUND!
Accompanied by Chara Dreemurr, the first fallen human turned apparition, the two journey through the unprecedentedly large Underground for one, very specific goal... but what exactly was it? And is that all there is to it?
In... time, all will be revealed.
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cryiing from peak😭😭🙏🙏
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What happens when a certain human child ends up in hell with nobody with them except the friendly murderous ghost they befriended and their own determination? Will they ever be able to go back home? Or will Frisk, in true pacifist nature, end up befriending these non-humans as always? Stay tuned and lets find out!
(DISCLAIMERS: I'm going to update tags after posting chapters (idk how to do it while posting because I've not written that many fanfictions before, so I'm sorry), a lot of this might not be accurate to the characters (I'm going to try) and the chapters might be short/ infrequent updates, also Frisk and Chara use they/them pronouns)
[DISCONTINUED]
Series
- Part 1 of UnderHell
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a little blue journal (should you be reading this?) by RattlesIsHere
Fandoms: Undertale (Video Game)
12 Apr 2024
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Sans has been in a mental (and physical) funk, so his doctor told him to start keeping a daily journal.
All the emotional moments... every day.
..even the ones he doesn't wanna talk about.
........
But, maybe he won't talk about it after all.- Language:
- English
- Words:
- 103,164
- Chapters:
- 212/212
- Comments:
- 550
- Kudos:
- 549
- Bookmarks:
- 75
- Hits:
- 13,971
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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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A little essay about Color’s importance to Killer because I love them and Color is too underrated.
Series
- Part 3 of Killer!Sans
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Sans didn't know what his name used to be, All he knew was that he was a human at some point, and that he was older then he was mentally and physically.
And when he blinked and he had a tiny bile of living bones in his hands, he knew he would give his life for his new baby.
Even when war crashed on the nation, he took it along himself to fight in the war effort in hopes for a better future for his son, he had later found out the baby was his brother, but he would forever be his son in his heart.
Papyrus was the reason he kept going, to strive for a better future.
Becoming chief in command wasn't a surprise.
It's when he appeared in a basement is what surprised him.
Why is there so many versions of him?
Why are they so tiny?
Why do they keep looking at him like that?
He just wants his son back for stars sake
He needs retirement after this, he's getting too old for this.
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Or in which a human is in the body of sans, goes to war for a couple of decades, and finds himself in a house full of versions of himself, and tries to take care of his son along the way.
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Follow my Instagram for story posts, RatatouilleRaco 🫶-
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Truly alternate universes. No timelines here. Focused on Frisk
- Words:
- 12,500
- Works:
- 6
- Bookmarks:
- 3
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Summary
Sans faces the human in the Judgment Hall.
Can be read as a separate story.
Series
- Part 2 of Life of The Skelebros
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Drunk On Power (And Ketchup) by Cat_On_A_Keyboard, Chill_Phil
Fandoms: Undertale (Video Game)
17 May 2025
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Summary
Frisk has been trapped in the same loop for longer than they care to track. They can now consistently break the barrier or get to 20 LV without taking any damage. After getting to Snowdin (again), Frisk decides to try something different.
Proofreading by Chill_Phil
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Bookmark Notes:
Chapter 21
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Under the Water Oak Tree by BubblyShip
Fandoms: Undertale (Video Game), Hazbin Hotel (Cartoon)
14 Jun 2025
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Summary
Alasor had this tree in his room. Native to New Orleans, with thick narrow leaves that cascaded up into the dome of a ceiling. Just past that, the architecture was anything but quaint- with fire flies buzzing about the air of green and blue foliage. Somewhere, somehow, the sound of nature always chirped from that centerpiece tree.
Sans would have found the tree appealing. If he wasn’t trapped with it.
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Alastor weaseled his way to some fanciful contracts when a sudden influx of monsters in hells population occurred. One of those unlucky souls was a certain skeleton Alastor took a very intense, platonic liking to.
Sans is thoroughly not amused.
Series
- Part 3 of Sans x Alastor
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Odly fluff filled? :))
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He was a bad brother. He knew that. He didn’t need all of this shit to happen for him to acknowledge that.
...Whatever it is that’s happening at this point.
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Papyrus made a stupid mistake and now sans is gone.
[THIS WILL BE REMADE]
Series
- Part 1 of Multiple scraps/unfinished works
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- Words:
- 14,258
- Works:
- 3
- Bookmarks:
- 5
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Bookmark Notes:
gaster, and the hole he left behind
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Summary
Being the one of the only teachers that understand sign language in your school, the 9 year old monster ambassador is placed in your class. Turns out you get along with them and their friends pretty well
Might get rewritten!! Might just give up on this!
Series
- Part 1 of WARBSP?
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Same You, Different Font by radskull69
Fandoms: Undertale (Video Game), Deltarune (Video Game)
09 Oct 2025
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Summary
Ah yes. The classic ‘’Heather’ convinces the skeletons you’re an evil human so now it’s a EVIL reverse harem’. Right?
Oh? But what’s this? A TWIST?
Sans couldn’t live with himself after what happened to you, going near insane after you’re gone. So behind the others back he uses the machine to undo what he did, except it didn’t. He can still feel his sins crawling on his back.
Oh well, it’ll all be worth it once he has you back in his cold hands again. Screw the other skeletons.
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5
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