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Toby Fox

AKA: Robert F. Fox, FwugRadiation, and Toby "Radiation" Fox

About Toby Fox

Toby Fox (born October 11, 1991) is a game developer and music composer best known for his hit indie game Undertale, which he composed over a hundred songs for.

Fox also created music for his Earthbound “Halloween Hack” and the popular webcomic Homestuck.

Fox’s music is available on iTunes, Bandcamp, and Steam.


An American music composer and video game developer, Toby Fox is best known for his indie game Undertale. Prior to its release in 2015, Fox had written music for Andrew Hussie’s web comic Homestuck, a project he joined as a high-school senior in 2009. About a child who navigates a monster-filled underworld while attempting to return to the surface, Undertale was released for Windows and OS X in September 2015. It sold a million copies by the following April. Evoking the sounds of ‘80s arcade classics like Mario Bros. and Dig Dug, Fox also wrote the electronic keyboard-based score for the game. Its soundtrack arrived on the label in 2016. After CrazyGroupTrio released the 15-minute EP Undertale: Arranged on Piano, issued the more comprehensive Undertale on Piano in 2017. It featured pianist Augustine Mayuga Gonzales. Fox went on to co-compose the score for 2017’s Hiveswap, a video game based on Homestuck. ~ Marcy Donelson, Rovi

-Spotify