Hundreds of genocides, and you were never satisfied. Never was. You're simply a murderer, tormentor of his kind. Broken his hopes and dreams. But THIS RESET changes all.
A gasp came out of Sans, a flash of memories in his mind. Every genocides you've committed remembered. And so, swore Sans to end you forever.
Ruins became, well, ruins. Ruined and collapsed into dust and debris. Nearly no traces of life remains. And yet, you smiled. Satisfied. Something new. At the end of it all, you witnessed her death. Straight from the traitor with the toy knife.
"SANS, PLEASE!"
A blast hits his body, destroying a part of him.
"WE C-CAN REASON WITH THE HUMAN!"
Yet another.
"I-"
When will it be enough?
"I... I UNDERSTAND, SANS. IF... IF THIS IS WHAT YOU MUST DO, AND IT MAKES YOU HAPPY... THEN... THEN I'M HAPPY TOO."
LV up!
That was what he heard. Papyrus is dead. His BROTHER is dead. A manic laughter escaped him, following by collapsing on the ground. That's when the guilt hits. Oh, Sans. Dear Sans has now entered total insanity.
You arrived at Waterfall and managed a few kills until you reached Undyne the Undying, who was on the brink of death. Seizing the opportunity, you went for a kill and managed it. That left Sans completely enraged.
"wha- no! i- it's alright, bro. i'll take care of the human later."
TELEPORT
And he was gone. LV up to LV 6!
Hotlands was a desolate landscape. The rising heat only fueled the dust. When you reached Mettaton Resort, you came into the diner. There he was, seemingly waiting for you. Now face to face, the final showdown is soon.
"heya pal. been busy? me too. but all that talk isn't gonna get you anywhere, would it? i know it won't. after all...""
BLINK
"You're just gonna be dead by daylight."
TELEPORT
...Well... that was eventful.
CORE. The source of monster's survivability and magic is going under meltdown. It'll explode soon enough, better get moving. Mettaton's already dead anyways.
After nearly getting blown up, you've finally reached the capital. New Home. The grey landscape mixed with the dust, keeping its beautiful scene... nah. Some buildings were destroyed.
And finally, Judgement Hall. The moonlight(I THOUGHT IT WAS DAYLIGHT DUDE I GOT SCAMMED) shone through the windows. The view unironically empty. But there he stood. The man, the myth, the legend and murderer: Sans.
"welcome back. good to be back, isn't it? i know, i know. you finally got something you wanted. something new, isn't it? it is. and now, i'll make a difference. i'll kill you and take your SOUL, your DETERMINATION. i'll be the most determined one. i'll RESET the timeline and you'll be erased. you'll finally stop being a nuisance. so be prepared, because your judgement day has arrived."
BATTLE, START!
"it's a dreadful day outside. dust is everywhere, no one is alive. on days like these, killers like us...
BLINK
...will have a MAD time!"