Underverse Stories

This is Glitchtale, but the beginning is different. Instead of Sans being his usual self, he turns into himself from Dusttale, where he killed all of the monsters and ga...

(m / n) (L / n) is a 19 year old boy and he is frisk's cousin, (m / n) always looks after frisk like his own sibling because since childhood frisk has always been treate...

I have more LOVE than you...kid, and the genocide has just begun.

(Obsessed)Nightmare Sans x Blind Reader Trigger Warning! Abuse! For Mature Audiences ~~~ Y/n has known nothing but darkness her entire life. Blinded by the cruelty of h...

Hello everyone,soooo,as a fan of underverse I wanted to try and make an X oc,yeah,anyways I think it'll be a little bit cringe since I didn't get the habit of writing st...

The bad and star sanses have made a truce because nightmare has been cured. Now nightmare can turn into corrupted form or passive form whenever he wants. One day, Ink de...

A person who is in the Undertale fandom (atleast not THAT much) becomes another victim of reincarnation. Just that they didn't expect to be reincarnated as a god... I do...

Matt was a regular person who was a big fan of Undertale and its fangames. One day, he dies because of a person accidently knocking him off a mountain while he was hikin...

So harem book of Charas and Frisks x male reader but real description is below this. The only one of his person in all universes is part of Undertale with an OP powers b...

What if someone from our world died knowing a lot from the undertale and their multiverse/underverse? What if that person also knew about the balance and didn't creat to...

Error in sad and lonely in AntiVoid, one day after getting ambushed the escapes into an unknown AU and is found by a few members of Nightmare's Gang, will they help him...

Request close Drawing by I don't know

Why am I making this? Why are you reading this? Why are we here?

I want to make a story about Dust tale sans. however I want to give him a whole new personality, background and even powers. somethings will stay the same. but if your i...

MY N0.1 OTP!!

What if our favorite knuklehead ninja goes to Undertale multiverse, become a monster, and has gamer system? This is my first story.

This just has a bunch or oneshots with error sans in them, mostly with ships as well. rules are in the first chapter MOST EARLIER CHAPTERS ARE BAD! READ AT YOUR OWN RI...

𝐔𝐍𝐃𝐄𝐑𝐕𝐄𝐑𝐒𝐄 𝐗 𝐑𝐄𝐀𝐃𝐄𝐑 | 𝐑𝐄𝐀𝐃𝐄𝐑 𝐈𝐍𝐒𝐄𝐑𝐓 ‹―💜―› "𝐅𝐀𝐍𝐂𝐘 𝐒𝐄𝐄𝐈𝐍𝐆 𝐖𝐇𝐄𝐑𝐄 𝐘𝐎𝐔 𝐀𝐑𝐄 𝐍𝐎𝐓 𝐒𝐔𝐏𝐏𝐎𝐒𝐄𝐃 𝐓𝐎 𝐁𝐄, 𝐖𝐀𝐍�...

20 year old (Y/N) is no ordinary human. About five years ago she was taken from her universe by Ink, a Star Sans who creates and protects AUs. He claims that she's dif...

You were a kind human who has a brother named Frisk. You and Frisk always get along until both of you climbed up a mountain. very curious if the legend was true or not...