In chapter two of Toby Fox’s 2018 RPG Deltarune, Kris, the game’s main protagonist, is approached by ally/healer Ralsei and asked if they are curious about what happened to Susie, their tank.

Near the end of Deltarune, Kris and Susie finally make their way back to the surface after defeating the king in the Dark World. At this point in time, Kris can explore the surface world and talk ...

That download turned out to be the first chapter of a new game, Deltarune, the name of which is an anagram for Undertale. After a cryptic introduction, the player controls a teenager named Kris ...

Deltarune's first two chapters are mysterious little RPGs following a character named Kris through their adventures in a "Dark World" with their classmate Suzie and a prince named Ralsei.