Undertale: Revenge

The barrier has been broken and the monsters from the Underground are free to go to the surface world. All is merry as they all prepare to move, particularly for the Dreemurr family. However, the breaking of the barrier has also broken the prison that was holding a powerful villain that the monsters have long since forgotten about, and he is bent on revenge on the Dreemur family.

Not only that, but Chara is still at large. With everyone distracted, she will seize the opportunity to join forces with this old enemy to overthrow the Dreemurrs and continue her plan to erase the timeline.

Unfortunately for them, there is still someone who stands in their way: the human, Frisk. With all her friends by her side, they would surely be able to stop the villains in their tracks...but there may still be a way. Frisk also conveniently has the one thing that Chara needs to fulfill her goals: a body.

Author's Note: Consider this to be rated PG-13. There will be minor bad language and major character deaths in this story. Don't say I didn't warn you.