This group is for stories that take place in worlds where all but one inhabitant of the world has vanished, or Majority of the population has vanished or died, leaving the protagonist(s) alone. There doesn't need to be an explanation it's just got to fit any of these types.

-All but one living sentient being left on the planet. (Can be human transformed or Human in Equestria alone)

-All but a handful or a few thousand left on the world. (Can be human transformed or Human in Equestria alone)

- Dropped into an Empty world alien to protagonist's own.