A pacifist ending means everyone made it out of the underground alive. A happy ending. Closure.
Except for two particular monsters. Two particular skeletons.
In a timeline where Frisk waited just a little while before freeing everyone from the underground, they are approached by a peculiar Lost Soul begging them to bring Sans back to them. They guide Frisk to a certain mysterious room in Sans' home and chaos soon ensues.
Throw in an alternate dimension, a deleted scientist, and three friends just trying to get home, and it seems like the return to the surface may have to wait just a bit longer.
At least, until a dirty hacker breaks through and teams up with a frightening Lost Soul of his own. Then Frisk realizes that the adventure has become a race for their and Sans' lives.
Sup Guys, me and the EarthBound Crew will be answering questions! You can ask: Ness, Paula, Jeff, Poo, Ninten, Gigyas, Porky, and Lucas! Have Fun reading!
All characters, except moi, are owned by Nintendo, and Creatures Inc.