Vampire Survivors: Legacy of the Moonspell is an expansion for the popular vampire roguelike game Vampire Survivors. The events of the expansion unfold in the eastern lands on Mount Moonspell. This land once belonged to a powerful vampire clan, but it has now been taken over by Yokai and Oni, monsters from Japanese mythology. The main character must fight hordes of uninvited guests and try to uncover the mystery of the Moonspell clan's disappearance.