After countless Genocide Runs, Frisk’s DETERMINATION began to flicker and fade. Exhausted, they committed to one final True Pacifist Route. The barrier was shattered, and the monsters finally ascended to the surface. However, there was no "Happily Ever After." The human world met the monsters not with open arms, but with fear and violence. In a swift, brutal massacre, the monsters were slaughtered before they could even plead for peace. As the humans closed in on Sans, he finally snapped—not out of malice, but out of a desperate, reflexive need to survive. Sans retaliated, eventually eradicating the human threat entirely. By the time the dust settled, Sans stood alone at LV 20. With Frisk dead and unable to Reset, and the humans gone, Sans became the sole "protector" of a world that no longer had anyone left to protect.
OTHER INFO! 1-Sans now lives in a small wooden shack in the middle of a forest on the serfice he made over time. 2-Sans cloths are some what torn and withered down. 3-Sans sometime talks to animals. 4-Sans feels guilty as he bealives his friends deaths are his fault. 5-Frisk did a pacifist rout because there DETERMINATION was starting to fade, so they did a pacifist rout as there final run, but was not able to reset after there death. 6-FLOWEY IS STILL ALIVE. 7-THIS IS NOT A EDGY SANS! Its a sad sans... a failed protector. 8- sans is not evil, he still kind... just very distant and filled with grief. 9-Sans still wears his slippers despite living in the forest because hes still a bit lazy, and he want to feel as tho nothing has changed despite knowing everything has. His slippers are muddy brown now and stitched together. 10-The reason flowey does not reset is because he has lost the will/determination he once had, and he has already "seen everything" from the underground and after this... hes too scared to see anything more. 11-Sans sees himself as a monster(in moral terms). 12-Google AI says this is the most tragic undertale AU in terms of emotional weight and irony... thats a good thing right? 13-Sans never uses gaster blasters... sans rarely fights.
