Toby Fox

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Toby Fox
Born (1991-10-11) October 11, 1991 (age 28)[1]
Alma materNortheastern University
Years active2009–present
Known forHomestuck

Toby Fox (born October 11, 1991) is an American video game developer and composer. He is best known for developing the game Undertale and his project Deltarune. He has also composed music for the webcomic Homestuck, as well as for the video games Hiveswap, Escaped Chasm, Little Town Hero, Pokémon Sword and Shield and Super Smash Bros.. He is also known online as FwugRadiation or as Toby "Radiation" Fox.


Toby Fox studied environmental science[2] at Northeastern University in Boston, Massachusetts. He started composing a variety of music for Andrew Hussie's 2009 webcomic Homestuck during his senior year of high school. Though he did not initially respond when Hussie started a "Music Contribution Team" in April 2009 and put up a news post asking musicians to participate, Hussie took note of his work when Fox started uploading piano covers of the webcomic's music on the MS Paint Adventures forums.[3] Fox has composed music for the 2017 Homestuck video game Hiveswap,[4] Undertale artist Temmie Chang's short narrative game Escaped Chasm,[5] and Game Freak's 2019 RPG Little Town Hero, the last of which was arranged by Pokémon composer Hitomi Sato.[6][7] He also composed a track for Pokémon Sword and Shield[8] and the song "74" for Itoki Hana's PRAY album, in which he appeared as a guest singer.[9][10]


Fox's most well-known work is the 2015 role-playing video game Undertale. The game sold more than 1 million copies,[11] becoming a "breakout hit" and "pop-culture phenomenon".[12][13][14][15][16][17][18][19] Fox worked on the entire game independently, besides the art assets—which he asked Temmie (Tuyoki) Chang to help with—to avoid relying on others.[20] He had some experience in game development before Undertale, using RPG Maker 2000 with his three brothers to make role-playing games and EarthBound ROM hacks in high school,[21] the most notable of which was Earthbound: The Halloween Hack.[22] He thought of the character designs and ideas for Undertale while in college, where he drew them in his notebook.[23]

Following its release, Undertale garnered an extensive fanbase.[24][25] Fox commented that he did not mind if people stated that they did not like the game, saying that it was "not for everyone".[25] Despite Undertale's awards and widespread acclaim, Fox wrote that his personal opinion was that the game was still "niche" and deserved an "8/10" review score.[24]

In 2016, Fox released a number of unused musical tracks from Undertale.[26] He also became a contributor to the A Profound Waste of Time magazine.[27] Fox was then chosen to be part of the 2018 Games Forbes 30 Under 30 list for his role in creating Undertale.[28]

The success of Undertale, especially in Japan, afforded Fox the opportunity to visit Super Smash Bros. creator Masahiro Sakurai at his home, where they discussed the series and played Super Smash Bros. Ultimate against each other. Sans, a character from Undertale, was later included in Super Smash Bros. Ultimate as a Mii costume available through downloadable content, along with his instrumental composition "MEGALOVANIA", for which Fox provided a new arrangement.[29][30][31]


On October 30, 2018, Fox tweeted a request for fans of Undertale to check the game's official Twitter account in 24 hours. The following day, Fox released the first chapter of the followup to Undertale, named Deltarune, for free under the guise of a "survey".[32][33] On November 1, Fox shared more details regarding the game, including that the rest of the chapters were expected to release simultaneously, but work had not yet started, and there was no estimated timeframe for completion.[34] Fox also stated that he had been working on the project since 2012, and that the idea for Undertale developed from Deltarune during production.[34][35] On June 12, 2019, as only the first chapter of Deltarune had been playable for several months, Fox expressed on his Twitter account he had hope he would complete the rest of Deltarune, saying: "Slowly I'm writing and drawing it all out."[36] He stated that he has written "about 50 songs past Chapter 1".[37]


Year Media title Role
2006-2008 Earthbound Hacks Segment: Arn's Winter Quest: Gway Edition, and Halloween Hack: Bad Fur Day Edition

Writer, composer, director, designer, programmer

2009 Homestuck Composer
2010 The Baby is You Writer, composer
2012 I Miss You - EarthBound 2012 Composer
2015 Undertale Writer, composer, director, designer, programmer
Potion Shop Composer
2016 Rose of Winter Composer
2017 Hiveswap Composer
2018 Deltarune Writer, composer, director, designer, programmer
Hiveswap Friendsim Guest composer
2019 Escaped Chasm[38] Composer
YIIK: A Postmodern RPG Guest composer
Super Smash Bros. Ultimate Guest composer
Little Town Hero Composer
Pokémon Sword and Shield Guest composer
Pesterquest Guest composer
2020 Dweller's Empty Path Composer
TBA OMORI Guest composer


  1. ^ "tobyfox on Twitter". Twitter. October 10, 2017. Retrieved April 12, 2020.
  2. ^ Dines, Jennifer (September 11, 2012). "CHANGE AGENCY: 826 BOSTON, EGLESTON SQUARE'S INSPIRATION CENTER". literacychange.
  3. ^ Funk, John (October 15, 2012). "Land of Memes and Trolls: The Epic and Ridiculous Self-Aware World of Homestuck". Polygon. Vox Media. Archived from the original on May 20, 2016.
  4. ^ Horti, Samuel (September 3, 2017). "Act 1 of Homestuck adventure game Hiveswap coming out this month". PC Gamer. Archived from the original on September 5, 2017.
  5. ^ Tarason, Dominic (April 2, 2019). "Escaped Chasm is a short, sad, free story by Undertale's artist". Rock Paper Shotgun. Archived from the original on April 5, 2019. Retrieved May 2, 2019.
  6. ^ Gilliam, Ryan (September 4, 2019). "Pokémon studio's new RPG Little Town Hero has music by Undertale's Toby Fox". Retrieved September 4, 2019.
  7. ^ "tobyfox on Twitter". Twitter. Retrieved September 14, 2019.
  8. ^ "tobyfox on Twitter". Twitter. Retrieved November 1, 2019.
  9. ^ "tobyfox on Twitter". Twitter. Retrieved April 6, 2020.
  10. ^ "【糸奇はな/Itoki Hana】74【Composed by Toby Fox】". YouTube. Retrieved April 6, 2020.
  11. ^ Grubb, Jeff (April 13, 2016). "Stardew Valley is one of the best-selling PC games of the year as it surpasses 1M copies sold". GamesBeat. VentureBeat. Archived from the original on April 22, 2016. Retrieved April 22, 2016.
  12. ^ Levine, Laguna (September 29, 2015). "Undertale: A New Cult Hit in the Making". CliQist. Archived from the original on December 23, 2019. Retrieved June 10, 2016.
  13. ^ McDonald, Mariko (December 22, 2015). "Why Undertale Won the Internet". Retrieved June 10, 2016.
  14. ^ Audureau, William (December 17, 2015). "Undertale, élu " meilleur jeu vidéo de l'histoire " à la surprise générale". Retrieved June 10, 2016.
  15. ^ Abbott, Josh (February 21, 2016). "How Will We Define Undertale's Legacy?". Complete Game Reviews. Archived from the original on June 12, 2018. Retrieved June 10, 2016.
  16. ^ Groux, Christopher (December 19, 2015). "'The Legend Of Zelda: Ocarina Of Time' Falls To 'Undertale' As Best Game Ever, Gamers Get Mad!". Design & Trend. Archived from the original on August 23, 2016. Retrieved June 10, 2016.
  17. ^ "Toby Fox's Cult Classic Undertale Coming to Nintendo Switch". DualShockers. March 8, 2018. Retrieved November 6, 2018.
  18. ^ "Cult RPG Undertale gets a surprise spinoff for Halloween". The Verge. Retrieved November 6, 2018.
  19. ^ Wawro, Alex. "Undertale dev reflects on what it's like to have your game become a phenomenon". Gamasutra. Archived from the original on August 3, 2017. Retrieved August 2, 2017.
  20. ^ Turi, Tim (October 15, 2015). "GI Show – Yoshi's Woolly World, Star Wars: Battlefront, Undertale's Toby Fox". Game Informer. GameStop. Archived from the original on January 20, 2016. Retrieved January 20, 2016.
  21. ^ Han Tani, Sean (May 25, 2013). "Toby Fox's Undertale – DEV 2 DEV INTERVIEW #1". ambient-melodic. Archived from the original on September 13, 2017. Retrieved January 20, 2016.
  22. ^ "Earthbound (The Halloween Hack) – Hardcore Gaming 101". Retrieved November 4, 2018.
  23. ^ Alexandra, Heather. "Undertale Creator Shares Notebook Full Of Early Concepts And Art". Kotaku. Archived from the original on August 3, 2017. Retrieved August 2, 2017.
  24. ^ a b O'Connor, Alice (September 15, 2016). "8/10: Undertale Dev Reflects On Unexpected Popularity". Rock, Paper, Shotgun. Archived from the original on August 3, 2017. Retrieved August 2, 2017.
  25. ^ a b Grayson, Nathan. "Undertale Creator: It's OK If People Dislike The Game". Steamed. Archived from the original on August 3, 2017. Retrieved August 2, 2017.
  26. ^ O'Brien, Lucy (September 15, 2016). "Undertale Creator Releases Unused Music to Celebrate 1-Year Anniversary". IGN. Archived from the original on August 3, 2017. Retrieved August 2, 2017.
  27. ^ "Ashly Burch, Toby Fox and Mike Z join the Profound Waste of Time team". Destructoid. Archived from the original on May 27, 2017. Retrieved August 2, 2017.
  28. ^ "Toby Fox". Forbes. Retrieved December 3, 2017.
  29. ^ "Super Smash Bros. Ultimate – Mr. Sakurai Presents "Banjo & Kazooie"". YouTube. Retrieved September 14, 2019.
  30. ^ Walker, Ian. "Undertale's Sans Joins Smash Bros. As A Mii Fighter Costume". Retrieved September 4, 2019.
  31. ^ "tobyfox on Twitter". Twitter. Retrieved September 14, 2019.
  32. ^ "Undertale creator's new game is Deltarune, a mysterious surprise". Polygon. Retrieved November 1, 2018.
  33. ^ "Deltarune Chapter 1 is the free and surprising start of a new Undertale saga". Rock Paper Shotgun. Retrieved November 1, 2018.
  34. ^ a b "Deltarune creator Toby Fox talks full release plans, upscaling". App Trigger. November 1, 2018. Retrieved November 13, 2018.
  35. ^ "tobyfox on Twitter". Twitter. Retrieved November 13, 2018.
  36. ^ "Deltarune update from creator's Twitter counter". Twitter. Retrieved June 12, 2019.
  37. ^ "Deltarune update from creator's Twitter counter". Twitter. Retrieved June 12, 2019.
  38. ^ Brown, Fraser (April 3, 2019). "Escaped Chasm is a free game about loneliness from Undertale's artist". PC Gamer. Retrieved May 18, 2020.