*WRITTEN IN 2016* "Can someone please just tell me.... Why him.....?" Confidence. That emotion has been coming to you a lot ever since you had met him... But Why him...?

Undertale. Underfell. Underswap. Swapfell. Flowerfell. Dancetale. Storyshift. Outertale. These are just a chip off the old block for the many diverse Uundertale AUs out there. Horrortale. Mafiatale. Mobtale. Echotale. Echofell. Terrortale. Dreamtale; and so many more! We would be here forever if I tried to mention ALL of the characters in ALL of the AUs. So, I only mentioned a FEW. This is a book cataloging the many, many Sans out there. Enjoy the book! (P.S. - PLEASE comment on a AU - or ALL of them, it's up to you! You can also submit a picture/link to a new AU I haven't managed to catalog, or even submit one of your own creation!)

This story contains Sans x Frisk, so if you don't like that pairing don't read. Or do, who am I to tell you what to do? After Frisks resets, she finds herself in the Underfell universe, but what kind of things will await her there? I do not own anything of this story. Enjoy !

Sans was a guy who never like girls, since he was small, he was also a bully, he never cares about anyone else, he only cares about himself, but the first day of school (year 2 of school) he met a girl named Frisk. When they are partners for a project Frisk has a crush on sans, after Sans finds out he felt the same thing, but refused his feelings and wanting to be himself but months pass by and Frisk changed Sans' life! He felt something surprising about Frisk, he likes frisk... But what if Frisk doesn't except his feelings Read the book to know more,

Death or Reaper Sans was wondering around making his usual rounds when he happens upon Frisk. "Hey there kiddo. Aren't you a child of life?" "No, she raised me but I am unlike her. So she sent me away. I was dead and yet I am alive." <Looking for inspiration guys. I'll let you all know before I add a new chapter. Think I'm going to work on it a little offline. Needs some new structure I think.>

Teenager Frisk falls into the underground and comes face to face with monsters, befriending them, and eventually makes her way out of the underground. Yada yada yada... BUT Frisk doesn't go on her journey alone. Once she fell, a strange monster suddenly seems to be pulled from wherever he was against his will and is forced to her aid. Once Frisk and this monster (G!Sans) meet, they immediately hate each other due to certain ... circumstances. To this pair's misfortune, G ends up being bonded to Frisk by 'Guardianship'. In this world, Guardians are protectors to their assigned human, forced to be by their side and to give their life to keep them out of harm's way. So, with G practically given no choice but to stick by Frisk, (no matter how much it blows on his end, what with a grudge against an unknown source), the two set out on their journey through the traitorous Underground. Though they can't help but drive each other crazy, they also grow a bond as they progress through it all, learning more about G's Guardianship, and about the power deep within Frisk's soul. But...what else lies behind the contract G is damned to follow?

things have been always awkward between Sans and Frisk they both have a crush on each other but.. they didn't know well, Papyrus knew Sans liked Frisk because he kissed her! Well while she was sleeping..and Sans was onto Frisk because she was hiding something from him. Will they both find out their secret?

Frisk has never spoke a word in her life, or that's what people think. The prison just passes her off as innocent and friendless. G can prove that isn't the case as he already once believed. But what does it matter? Despite everything, Frisk will still smile and wave, as if life isn't hard for her. Even when it clearly is. Her sister, Kiri, is the only thing that keeps Frisk going. However as soon as she starts accepting G's help, she loses everything. But still goes on with her life. But that feeling grows in her chest once again and again she is forced to accept it.

(Midquel to Daybreak) It's only a matter of time until one of them breaks. And the other goes to insanity. But what happens when you die committing suicide? When you go to Heaven or Hell? What if there's a forgotten world of the dead?

The human world and monster world are separated. Monsters need magic to survive, so they have made a truce with the humans. Humans will sacrifice one of their own with the correct SOUL each time the magic barrier weakens. This year its you. but the strangest things happens to you. you survived the barrier and woke up on the other side as a monster. now you need to learn to adapt in the new world. and the roommate that you were assigned to just makes things stranger