DELTARUNE is a spin-off of the puzzle game Undertale, as indicated by the game’s name, which is an anagram of the word. The difference from Undertale is that now it is possible to fight with a team of heroes at once. They can defend themselves, use magic and many other features. The design and graphics have changed significantly. The main character of Delta Rune is a boy named Chris. A monster from school drags him into the Dark World along with a girl named Susie. There they are met by Ralsei, who calls the heroes Light and says that they are the chosen ones who will have to destroy the forces of darkness. The combat is presented in turn-based battles, where the protagonists choose between mechanics such as «Attack» or «Mercy».