Toby Fox

Robert F. "Toby" Fox (born October 11, 1991) is an American indie video game developer and composer. He is best known for creating and scoring the 2015 role-playing video game (RPG) Undertale, as well as Deltarune, a parallel story to Undertale released in chapters since 2018, with five of its planned seven chapters released as of November 2026. Undertale was developed almost entirely by Fox, and has been ranked by numerous publications as one of the greatest video games of all time.