It’s the same timeline as UT, but Frisk didn’t fall. Instead, the monsters are stuck Underground. Eventually, they figure out how to make themselves cybernetic using the power of the six human souls, and after being down there for so long, they give up hope for ever escaping and choose immortality instead. Many years later, they’re running low on soul power when suddenly, the player falls in, and they need your soul to power them even longer. (edited)
Intense Cartoon Violence
Fantasy Violence
Animated Bloodshed
Drug Reference