Cross Stories

1.2K Stories

Mr.  Erratum by CrimsonOrRetry
Mr. Erratumby Crimson/Retry
Error can take it no longer. After centuries of Pain and suffering, Error no longer cares what happens to the people who caused him pain, and now wants to leave the plac...
Paws by TheoryKierei
Pawsby TheoryKierei
Book 3 of the Cross-shifter Series. Life has always been good for Sam. He had it all. The huge house. All the hot one night stands he could ever want. Parents who could...
The Book oF Error by poisonusbuttercups
*insert a really good description of the book here*
Retrace bxbxb by TheoryKierei
Retrace bxbxbby TheoryKierei
(Book 2 of the Reverse series. This is a stand-alone story) What is a young boy to do when he is mistaken as a girl after stealing and offered a lifeline from possibly b...
Whiskers by TheoryKierei
Whiskersby TheoryKierei
Book 4 of the Cross-Shifter Series. Can be read as a stand-alone but might be confusing at the beginning for a bit.) Being captive for years has soured Palace's outlook...
Claws (mxm) by TheoryKierei
Claws (mxm)by TheoryKierei
This is book 5 of the cross-shifter series and a continuation of sorts for Whiskers. Happiness wasn't something that you earned. It was something that you killed for. D...
Sanscest One-shots (no lemons) (Requests Closed) by LtHunter
Sanscest One-shots (no lemons) ( Lieutenant Hunter
just some one-shots of Undertale AU ships. I do not own any of these characters (unless state otherwise). I try to update twice a week.
Multiverse Switch by MiraiShiaki
Multiverse Switchby Afterdeath_14
"I'm not, I repeat, I'm NOT going to play around with you." "It's your fault why we're stuck like this." "I can disguise as a guard! We could-&q...
Creation Begins with an I, Destruction Begins with an E (Undertale Errink Book) by EmoTrash360
Creation Begins with an I, Brooke Is Trash
Error and Ink are two Gods, one of creation, the other of Destruction. One is a tattoo artist, happy with his life, the other works in an office, wishing he could quit h...
Criminal Conflict (an Undertale sanscest story) by __Purple_Fluffball__
Criminal Conflict (an Undertale Crossmare Slut
This is an Undertale book Criminals have always littered the streets causing a mess and breaking the law. But what happens when criminals Fall in Love? This includes all...
You don't understand!! I WILL HAVE THE LAST LAUGH!!(error story) by OMG60123T2
You don't understand!! I WILL OMG60123T2
It's an error story, As you seen from the title Art not mine
𝐔𝐍𝐃𝐄𝐑𝐂𝐔𝐓 by UndertaleFanFicz
𝐔𝐍𝐃𝐄𝐑𝐂𝐔𝐓by ✧「M.A.4.Ə」✧
The Misunderstood Glitch ( An Error Story ) by ZaryasTales
The Misunderstood Glitch ( An Zaryas Tales
As many Fgod stories shows that Error was forced to destroy by Fate. What if Fate didn't force him at all, what if Error decided to help her by destroying Aus, What if F...
Au Sans X Reader lemons by 23whitecrystal
Au Sans X Reader lemonsby ✨ M e L K ✨
I don't know what to say.This is how to deal with lemons with different Au sans apparently.
Bloody Love~ (HorrorLust) by _QuartzCrysta_
Bloody Love~ (HorrorLust)by Quartzite
Lust, the Sans that everybody hates, is sick and tired of his AU. He wants to try something new but, what is that 'new'? He went through a portal and ended up in a blood...
[He's Different | Undertale Highschool AU] by A_Little_Potato166
[He's Different | Undertale Potato_UwU
Sans just chillin' in his sentry with a bottle of ketchup on his hand. But then, suddenly a portal spawn a few yard where sans is chillin'. curious, sans teleported to t...
That's The Stupidest Idea Ever [Sanscest Multiship] by x_mystica_x
That's The Stupidest Idea Ever [ ☆Mystica☆
(That's the stupidest name for a story ever) (I used to be x_gxlaxy_x, I'm just too lazy to change the cover) The Star Sanses are made up of Ink, Blue, and Dream. While...
Goopy Love by LaunchSteinward
Goopy Loveby LaunchSteinward
1.A Shight / Dreammare story - a Nightmare x Dream story. - a Shattered Dream x Nightmare story - a Octopussest and Sansest story 2.My sucky attempt at fluff ...
I'll help you  ( Multiship) by ShugarHoneyIcedTi
I'll help you ( Multiship)by ShugarHoneyIcedTi
WARNING! This fanfic contains sensitive topics like self harm, rape, depression, and more! All sans don't belong to me Credit to teh owners. Just read it , I don't kno...