Deltarune is a role-playing video game The player controls a teenage human, Kris, who is destined to save the world together with Susie, a monster, and Ralsei, a prince from the Dark World. During their quest in Deltarune to seal the "Dark Fountains" prophesied to end the world, the group meets the inhabitants of the "Dark World", some of whom try to stop them. The combat system in Deltarune is based on bullet hell attacks the player must dodge. Enemy encounters can be resolved peacefully or through violence.