* MY MY, THIS IS THE SADDEST DISPLAY I'VE EVER SEEN, DARLING!
* THIS ARTICLE IS NOT UP TO THE
OtherWorld in an AU that is an unofficial full-length sequel to Undertale, that is currently in development.
After the barrier was broken, all monsters were presumed to have gone to the surface. Eventually, the entrance to Mount Ebott was destroyed, leaving monsters who were unable to leave the Underground in time trapped.
The protagonist starts out sailing on a fishing boat, yet soon is thrown off of the boat and into a whirlpool by a hurricane. After being unconscious for a while, they wake up in the Underground, the whirlpool now being the only entrance since the Mount Ebott entrance was destroyed.
Much, (if any) of the gameplay is altered from Undertale, as the player can still choose to kill or spare monsters. The choices the player makes also have an impact on how they are interacted with by monsters. The game will feature new characters, as well as ones from Undertale.