Deltarune is the highly-anticipated successor to Undertale, the hit indie RPG that took the gaming world by storm in 2015. Though the two games are part of the same franchise, Deltarune is not a traditional sequel. Rather, it's a "follow-up" to Undertale, as series developer Toby Fox puts it. Deltarune contains many of the same characters and plot elements from its predecessor, but it's set in an alternate universe of sorts, one in which monsters are not banished to the Underground realm and instead live alongside humans in the modern day. Like Undertale, the game features a mechanic that allows players to resolve conflicts either peacefully or violently, which shapes its overarching narrative.