DELTARUNE Demo is a demo for DELTARUNE, Toby Fox’s parallel-story adventure connected to the UNDERTALE series. Its premise pairs new main characters with familiar faces from UNDERTALE, setting up an adventure that can be approached as a story in chapters rather than a single sprawling, open-ended journey. The demo identifies Chapters 1 and 2 as its free offering, while the broader project is described as continuing through later chapters.
Combat blends fighting with the option to spare opponents, and its battles use creative bullet-dodging inspired by Touhou and Chrono Trigger. That mix gives encounters a distinctive action focus while preserving a choice between aggression and mercy. The chapter-based structure is designed to let players pick up the story from anywhere, an unusual fit for a narrative adventure that still emphasizes continuity between its characters and episodes.
DELTARUNE also stands out through its expressive pixel animation, credited to Temmie, and a substantial soundtrack and story by Toby Fox. Hidden bosses add a sharply challenging counterpoint to the main adventure, while the game’s playful personality comes through in its teasing references to familiar characters. The demo offers a look at this specific chapter-based adventure; its content may differ from the wider project.
