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Undertale developers

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The developers and contributors for Undertale. Developers are listed in the order of appearance in the True Pacifist ending credits, followed by the Neutral Route ending credits. Further context on their contributions was shared via the UNDERTALE 10th Anniversary Stream. Undertale Kickstarter backers are not included on this page.

Toby Fox

Annoying Dog sprite.gif
Toby Fox's sprite from the Kickstarter page, representing an Annoying Dog.

Toby Fox is the main developer and composer of Undertale. Before Undertale, he was best known for his contributions to the webcomic Homestuck and his 2009 EarthBound Halloween ROM Hack. His most well known contributions outside of Undertale include OMORI, Pokemon and the OFF remaster.[1][2]

He is represented in-game by the Annoying Dog.

Temmie Chang

Temmie Chang sprite Kickstarter.gif
Temmie Chang's sprite from the Kickstarter page.

Temmie Chang is the main artistic assistant of Undertale. She collaborated on Homestuck alongside Toby Fox, J.N. Wiedle, and Guzusuru. Temmie's contributions include concept art, the opening prologue sepia sequence, the sepia sequence which shows Asriel meeting Chara, two and a half of the shops, some NPCs and overworld sprites, most of the tiles in Snowdin, Toriel's Home, and other pieces that were split with Toby.[3][4]

She is represented in-game by Temmie.

J.N. Wiedle

J.N. Wiedle, also known as Jones, is a freelance cartoonist and comic artist based in Brooklyn, New York whose most notable work include the "[S] GAME OVER" and "[S] ACT 6 ACT 6 INTERMISSION 5" animations for Homestuck, the Transformers comics and Paradox Space contributions alongside Magnolia Porter.[5][6][7] Jones is also credited as a storyboard artist for the animated series Craig of the Creek. Their webcomic, Helvetica, which is centered on a skeleton named after the font Helvetica, is the inspiration behind the brothers Sans and Papyrus, both of which are named after fonts as well. Jones had also playtested Papyrus's original date, where he would abruptly dump the protagonist in a cruel way. In 10th Anniversary Stream, Toby comments that this had made Jones cry.[8] The characters inspired by their work are:

Magnolia Porter

Magnolia Porter is a freelance illustrator best known for her contribution for Paradox Space alongside J.N. Wiedle and her webcomic Monster Pulse. She is credited as an assistant monster designer. Magnolia Porter created the following monsters:

Gigi D.G.

For Gigi's work on Deltarune, see Gigi D.G..

Gigi D.G., formerly known as Peachifruit, is an artist responsible for the creation of the webcomic series Cucumber Quest, Let's Destroy Metal Gear!, the visual novel Soul of Sovereignty, Lady of the Shard, The Idle Divination and the now-defunct webcomic Hiimdaisy. They provided extra art and testing for Undertale, and fashion design for Undyne. Outside of Undertale, Gigi D.G. is credited as a writer and environnement designer for Sonic Color: Rise of the Wisps.[9]

Pauli Kohberger

Pauli Kohberger is an artist and art teacher based out of Columbia, Maryland.[10] While not directly involved in Undertale 's developpement, their character Bob Sparker from Tales from Electricopolis served as special inspiration for Mettaton.[11]

Sarah

Sarah also served as special inspiration for Mettaton.

Michelle Czajkowski

Michelle Czajkowski is the author of the webcomic Ava's Demon, who guest designed Muffet. Before that, they have worked for Pixar and Dreamworks.[12]

Kenju

For Kenju's work on Deltarune, see Kenju.

Kenju is a pixel artist who was a "hyper tester" pre-release, and the tileset artist for Waterfall, Hotland, and CORE, which was based off of concept art, and helped with individual props.[13][14] For the 10th Anniversary Stream, Kenju is credited with creating the new Hotland buildings. He has also worked on Rivals of Aether and Katana ZERO.[15]

Merrigo

Merrigo sprite Kickstarter.gif
Merrigo's sprite from the Kickstarter page.

Amanda Haddad also known as Merrigo, is a Californian graphic designer, web designer and a pixel artist since 2012.[16] She is the main background artist for Undertale, such as Home's background parallax,[17] and New Home's castle appearing at a distance in Waterfall.[18] In the 10th Anniversary Stream, Merrigo worked on the Waterfall underwater parallax background.[19]

Chess

For Chess's work on Deltarune, see Chess.

Chess is an artist, streamer and game developper. She did extra art, testing and also helped Toby Fox programming the UNDERTALE Alarm Clock. Chess is currently developping a game called "Toytime".[20]

Clairvoire

For Clairvoire's work on Deltarune, see Clairvoire.

Clairvoire is an artist, programmer and animator. They did extra art and testing, being one of the playtesters to be upset by the original version of Papyrus's date.[8] Clairvoire had done the inner background graphic for Waterfall's telescope puzzle,[21] and also drew the dog food in Alphys's Lab.[22] Outside of Undertale, they developped the now in indefinite hiatus game Sealark in collaboration with Flashygoodness.

Easynam

Easynam sprite Kickstarter.gif
Easynam's sprite from the Kickstarter page.

Easynam is a British composer, artist and software engineer who contributed with overworld art,[4] including tiles for the Ruins.[23][24] He is friends with Temmie, and Toby remembers eating chicken ramen with him.

Guzusuru

Guzusuru sprite Kickstarter.gif
Guzusuru's sprite from the Kickstarter page.

Angela "Guzusuru" Sham was an animation assistant on Undertale. They are best known for their "A Lullaby for Gods", "[S] Terezi: Remem8er", "[S] Collide" and "[S] ACT 7" animations for Homestuck,[5] as well as their work as an animation director on Hiveswap.[25][4] In the Kickstarter, Guzusuru is credited for creating the Kickstarter thumbnail. In the Neutral Route credits, they are credited for creating Asgore's trident reveal animation. Guzusuru also created battle sprites for Papyrus, though they are unused due to looking "too good". Outside of Undertale, Guzusuru is a professional animator at Titmouse,Inc. where their most notable work include The Midnight Gospel and The Legend of Vox Machina.[26]

Everdraed

For Everdraed's work on Deltarune, see Everdraed.

Everdraed began editing on Starmen.net and Someting Awful.[27][28] He co-designed and helped create assets and animation for the Omega Flowey battle and created the release trailer for Undertale.[29][30] Outside of Undertale, Everdraed made the game SERVE it UP and was also in charge of the graphics and editing for the OFF release trailer for Nintendo Switch and Steam.

Flashygoodness

Flashygoodness is a composer, designer and programmer since 2008. They began their career with the game Tower of Heaven.[31] Flashygoodness provided programming help, in addition to creating the ASGORE remix Bereavement as a bonus track for the soundtrack CD included with the Collector's Edition of Undertale. Outside of Undertale, they worked on the platform fighter series Rivals of Aether with the music group RESOFORCE. They also provided music for Clairvoire's game Sealark.

Leon Arnott

Leon Arnott is a game developer and programmer. He provided programming help and was responsible for getting Undertale ported to macOS.[32] Outside of Undertale, Leon Arnott ported a number of games to macOS, such as Hotline Miami.[33]

Mike Reid

Mike Reid is an animator and designer.[34] He is the guest artist that designed Glyde.[35]

Cap

Cap is the guest artist who created the Faun found at Lesser Dog's station in Snowdin.[36] They also drew many NPC concepts in 2013, but most of them ended up being unused. Some of Cap's NPC spritesheets was later shared during the 10th Anniversary Stream.[37] This includes Cap's portrait of the "foxradiation" NPC, who was created on "a funny whim".[38] Outside of Undertale, they provided art to the fan album Land of Fans and Music 2 and the OFF tarot card project.[39][40]

Sarah O'Donnell

For Sarah O'Donnell's work on Deltarune, see Sarah O'Donnell.

Sarah O'Donnell ported Undertale on PS4, PS5, X-Box, the Nintendo Switch and Nintendo Switch 2.

Stephanie MacIntire

Stephanie MacIntire is a guest artist for the Undertale Soundtrack. She played the guitar for the track Undertale.

References

  1. ↑ Pokémon Scarlet and Violet have released! I had the honor of making a few songs for the game: "Tera Raid Battles", the "Academy Ace Tournament", and of course, "Battle! Zero Lab". I also composed "Area Zero", which was re-arranged by my friend Go Ichinose.



    I also composed a majestic theme melody for the song "Academy". Surprisingly, this ended up used as a field theme for the whole game! Though, all songs using the melody were made by other amazing composers. (I love the soft piano version that plays at night.) Anyhow, that's all I did!     — Undertale/Deltarune Newsletter Issue 1 (Winter season) (December 20, 2022.) toby.fangamer.com.
  2. ↑ OFF INTERVIEW: Toby Fox
  3. ↑ Temmie Chang's official Tumblr.
  4. 1 2 3 UnderTale by Toby Fox — Kickstarter. Retrieved January 7, 2015
  5. 1 2 Homestuck Art Credits
  6. ↑ My variant cover for the Till All Are One Annual! I’m so happy I got to do this- I’m a big fan of TAAO and I’m so humbled to contribute in any small part to what will no doubt be an amazing finale by @mscottwrites and @spewpew!! — jnwiedle on Tumblr, September 20, 2019.
  7. ↑ I also did a cover for Lost Light #13, featuring everyone’s fav blurple frat boy!! So pleased with how this one turned out, and it was so fun to work on 😄 — jnwiedle on Tumblr, September 20, 2019.
  8. 1 2 UNDERTALE 10th Anniversary Stream - Day 1 (02:38:31) on YouTube
  9. ↑ Art — GGDG
  10. ↑ Maryland State Art Council
  11. ↑ Tales from Electricopolis FAQ
  12. ↑ MC: Ever since I was little I’ve wanted to make comics. But like I said — to this generation, art really isn’t a career. I had to consider something else to make money and make my parents happy. I veered off from comics to animation, eventually got into 3D animation. I worked for Pixar and Dreamworks. And once I got there, I realized that it was very much a business and corporation, and I wanted to create. While I was working at Dreamworks, I went home at 6 every night and worked from 6 to 12 on this comic. I didn’t think it would actually make me a sustainable career, but it did, which was a nice surprise. — Surround Yourself With Things That Make You Happy: Michelle Czajkowski on ‘Ava’s Demon’ (August 05, 2015.) Comics Alliance.
  13. ↑ Tilesets of the Waterfall cave, Hotland, CORE, and indivudual props here and there.

    And did some playtesting before release. I was able to smuggle a dog into illegal areas before it got patched out.     — pixelkenj on Tumblr, September 15, 2015.
  14. ↑ UNDERTALE 10th Anniversary Stream - Day 1 (03:15:45) on YouTube
  15. ↑ Since there was a whole DLC trailer dropping I saved the alt to the earlier pic for today. Still surprised and humbled how much traction the early design got, getting his own side of the fandom making art and such! 🙏 So I'll share some trivia with you- — @kenju.bsky.social on Bluesky, April 11, 2025.
  16. ↑ Around 2012 is when I had started posting my work online, and shortly thereafter I started getting approached to work on different projects and other freelance commissions. Currently, I work full time as a graphic designer, so I don’t create pixel art for freelance. The pixel art I create today is mostly for myself, and when I can, I enjoy creating pixel art products for my store. — Pixel art from a place called home (Mucho Pixels, January 25, 2022.) muchopixels.com.
  17. ↑ UNDERTALE 10th Anniversary Stream - Day 1 (02:10:47) on YouTube
  18. ↑ UNDERTALE 10th Anniversary Stream - Day 1 (03:32:56) on YouTube
  19. ↑ UT Anniversary stream was so fun to watch 🥹. I had a lot of fun coming back to work on the special stream bits! Congrats to everyone involved and thank you for having me!

    If you found me here from the stream, hi! Please remember my final message...     — @merrigo.bsky.social on Bluesky, September 22, 2025.
  20. ↑ finally started rebuilding toytime from scratch in godot over the past couple weeks. i havent touched the unity version of it in about a year… it was Really daunting to get started with godot 4 but i’m starting to get quite comfy with it!!! (music is “Out At The Mines” from the oldschool runescape ost) — videochess on Tumblr, June 06, 2024.
  21. ↑ UNDERTALE 10th Anniversary Stream - Day 1 (03:18:53) on YouTube
  22. ↑ resume: drew dogfood — @clairvoire.bsky.social on Bluesky, September 20, 2025.
  23. ↑ Temmie's post on DeviantArt
  24. ↑ UNDERTALE 10th Anniversary Stream - Day 1 (01:11:00) on YouTube
  25. ↑ Hullo!! My name’s Angela and I’m the animation director on Hiveswap. I’m responsible for overseeing the development of sprites, cutscenes, and basically anything that moves. Together with our lead animator Adrienne, I help to make the pictures go. I’m very lucky to be drift compatible with her. — guzusuru on Tumblr, August 03, 2017.
  26. ↑ Angela Sham at IMDB
  27. ↑ If you make cool flower art, know that I most certainly will see it, consider it amazing, and think you’re the top for making it! I might even try animating it myself, though I’m quickly finding out trying to keep up creatively with fans is exhausting! I must be out of shape, it seemed a lot easier back in my Starmen.net days… — everdraed on Tumblr, October 29, 2015.
  28. ↑ Everdraed's Something Awful profile
  29. ↑ I love this game so much, I made the trailer for it! I did so after being super impressed by the demo, and asking Toby if there was some way I could help out. - Everdread. September 15, 2015. Steam.
  30. ↑ hey! I'm the duder who worked on Omega Flowey / does video stuff for UT (I called in for it when it was a gdq finale), I'm actually here at sgdq for Fangamer stuff, would you be okay with meeting up? — June 28, 2018.
  31. ↑ flashygoodness's website
  32. ↑ Additionally, the Undertale demo is now available for Macintosh!!! (Thanks to Leon Arnott for making this happen.) — undertale on Tumblr, June 23, 2013.
  33. ↑ The Mac port of Hotline Miami is out now. I'm really sorry it took so long, everybody… There was a lot to do to get it absolutely right. — March 21, 2013. [deleted] Archived on his website.
  34. ↑ mkreid.com Archived September 23, 2019
  35. ↑ I was given the opportunity (through Kickstarter) to submit a design for the monster in the game and I’m incredibly proud to have it included. — spellmaus on Tumblr, September 16, 2015.
  36. ↑ UNDERTALE 10th Anniversary Stream - Day 1 (02:11:49) on YouTube
  37. ↑ Some sprites shown on the Undertale 10th Anniversary stream. Original file names in alt text. I made these in 2013. — penumbraphantasm on Tumblr, September 22, 2025.
  38. ↑ About the fox... I drew those sprites on a funny whim back in 2013. Toby hadn't asked for them and I didn't think he ever considered using them. I didn't find out until this year that lava fox stew had been on the menu lol — @caplog.bsky.social on Bluesky, September 22, 2025.
  39. ↑ cards i drew for the OFF Tarot Project

    and some of their initial sketches     — penumbraphantasm on Tumblr, September 02, 2021.
  40. ↑ okay so if you’re not aware of it already, Land of Fans and Music 2 (or LOFAM 2 for short) came out today! i highly recommend you give it a listen if you haven’t already! a bunch of fantastic people put a lot of work and love into this thing!

    and so here we have these two contributions to the album! i did the track art for Elegy for a Thief (Dreamscape Remix) and Unforgiving Terrain and i’m honored that i was able to be a part of the project!

    whoops i’m rambling! what you still doing here? just go listen to the album already!     — penumbraphantasm on Tumblr, December 25, 2012.
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