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Deltarune

From Deltarune Wiki
For the in-universe symbol, see Delta Rune.

Deltarune is the second role-play game independently developed by Toby Fox, with most art by Temmie Chang. The game's setting is a parallel world from Undertale's, with it having potential connections to its predecessor.[1][2] Deltarune is being developed in GameMaker, and due to its length and complexity, it has a large team of developers.[3] Currently, the game is only available in English and Japanese, as Toby states it is not possible to support other languages during its development.[4]

Deltarune's paid release was June 4, 2025 to coincide with the Nintendo Switch 2's launch date in Japan.[5] Its price is $24.99, with subsequent Chapters intended to be released as free expansions to the paid version of the game.[6] For console versions, Deltarune only has to be bought once on a Nintendo or PlayStation console via cross-buy.[7] SAVE data can also be transferred from the demo to the full game. The official Deltarune FAQ page has further details on this, and emphasizes the option to import data only displays once.

Toby Fox has stated that official content releases for Deltarune and Undertale are from the official accounts, as well as from his Bluesky, Twitter, and Tumblr accounts.[8] Content releases such as anniversary events are also notified via the Newsletter on the official Deltarune and Undertale websites.[9]

Gameplay

Deltarune is an episodic role-playing game with up to seven Chapters listed. It features a party system where Kris leads their friends as they explore the Dark World and Light World.

The Dark World's gameplay features collecting items, solving multiple puzzles, and enemies being visible on the overworld. These enemies can be avoided by running or fought via encounters. These turn-based battles are the core of the game: each party member has a separate turn, where they can be set to perform a command: FIGHT, ACT/MAGIC, ITEM, SPARE, or DEFEND. FIGHT, as well as certain spells under MAGIC, can deal damage to an enemy.

Rudinn attack diamond cutter.png
The SOUL dodging white bullet attacks

The enemy's turn is a bullet hell segment where the player moves Kris's SOUL to dodge attacks for the party. The SOUL being close to an attack causes grazing to occur, which earns TP for the party to cast Spells.

The player can choose to defeat enemies via violence, or Recruit them via ACTing/Actions or casting Pacify on Tired enemies for a peaceful end. Both choices contributes to the Chapter's route end, which can have unique dialogue and slightly altered events in both the Dark World and Light World. Defeating the main or final bosses a certain way can also influence the Chapter's end.

In contrast, the Light World's gameplay is centered around interacting with Hometown and its residents. There are no battles, and SAVE points only appear in Chapter 4. The menu is the simple one featured in Undertale.

For both worlds, the game is centered around character development that compliments the overall story. The player can influence dialogue in a minor or drastic way, including cutscene changes with choices via prompts, subtle quick time events, and interacting.

Deltarune has up to three SAVE files per Chapter, which can be duplicated and deleted, and encourages replaying a Chapter. The SAVEs work Chapter-by-Chapter, with choices and progress transferring to later Chapters via Completion FILEs. Using a Completion FILE is also optional, with the default file meant for "lighthearted" play.[10] The previous Chapter SAVEs can still be used without affecting the future Chapter SAVEs. Due to cutscenes being unskippable, dialogue can be sped up with the [CANCEL] button,[11] and text boxes can also be skipped by holding the [MENU] button.[12]

Synopsis

Once upon a time, a LEGEND was whispered among shadows.
It was a LEGEND of HOPE.
It was a LEGEND of DREAMS.
It was a LEGEND of LIGHT.
It was a LEGEND of DARK.
This is the legend of DELTA RUNE

Ralsei explaining the prophecy

The player is set to control Kris, a quiet human teenager who lives in a small town populated by monsters. Upon going to school, Kris is paired to be in a group project with Susie, a rude monster student. When retrieving chalk from the supply closet, the two fall into a Dark World and meet Ralsei, a kind-hearted Dark Prince who reveals the prophecy to them:

The Legend soundtrack.png
The three heroes, as The Legend plays

The Dark World and Light World live in harmony with each other: Lightners are supported by the Darkners, who are living manifestations of objects in the Light World. It is foretold by the prophecy that the light and dark will fall out of balance and bring the Roaring, an apocalyptic disaster.

This fate can be prevented by Kris, Susie, and Ralsei, who are the heroes destined to restore balance to both worlds. Thus, the three heroes journey through Dark Worlds to seal the Dark Fountains that the Knight creates across Hometown. Throughout the story, the heroes experience personal growth and form relationships, all while questioning the dynamic between Darkners and Lightners as they uncover the mysteries surrounding Hometown's past.

Alternatively, the player can derail the main story through specific criteria to start the Weird Route, a more violent route of the game that drastically alters several key points in the story.

Chapter 1: The Beginning

Chapter 1 icon.png
Chapter 1 icon

In which the player creates a vessel that gets abruptly discarded, then is set to control Kris. After Kris gets paired with Susie, the two discover the Dark World, meet Ralsei, and learn of their predetermined roles. The two Lightners venture to return home to the Light World, and are repeatedly impeded by Lancer, who follows King's orders.

Chapter 2: A Cyber's World

Chapter 2 icon.png
Chapter 2 icon

When Kris and Susie intend to return to Castle Town, Noelle interrupts and invites them to study with her and Berdly at the library. After their brief visit, the two Lightners discover the library has a Dark Fountain. In it, they meet the eccentric Queen, and find that both Noelle and Berdly fell into the Cyber World.

Chapter 3: Late Night

Chapter 3 icon.png
Chapter 3 icon

Susie and Kris wake up to find the Dreemurr residence has transformed into a new Dark World. Shortly after, Ralsei reunites with them, and Susie tries to invite him to the upcoming Hometown festival. Ralsei informs that he cannot, and explains the truth about the Dark World. As they converse, an enthusiastic Tenna intervenes and invites them to his game show, TV Time.

Chapter 4: Prophecy

Chapter 4 icon.png
Chapter 4 icon

Toriel brings Kris and Susie to church for service. Afterwards, the two search for clues for the shelter codes, including at Noelle's House. When Susie and Kris are suddenly dismissed, they return to the Dreemurr residence, only to notice the locked door. In search of Toriel, the duo find the church now has Dark Fountains. In the Dark Sanctuaries, they find Ralsei being troubled, learn more of the prophecy, and meet the wise Old Man.

Listings

Game information

Development

Development for Deltarune is separated by Chapters, with upcoming Chapters currently in development. The following consists of a timeline of general development for the game, with information from social media posts, Status Updates, Newsletters, and interviews:

Pre-development

Lancer artwork kanotynes.png
Lancer's playing card as jack of spades in Kanotynes's deck project,[13] now an official merchandise[14]

In 2011, the concept for Deltarune came from a fever dream Toby Fox had in college, which depicted an ending to a video game. He was determined to make a game with this ending into a reality.[15]

In April 2012, Toby saw Kanotynes's playing card character designs on Tumblr, which inspired him to make an RPG.[16][17] He had asked for permission to use them,[18] then began development in 2012 on music tracks, created images of Lancer, and wrote script dialogue for characters such as Susie, Lancer and Jevil.[19][20] Despite this, the unnamed RPG's development was abandoned before he could create a single room.[21][22] This RPG idea led to the creation of Undertale, and the original RPG idea later transformed into Deltarune.[23]

During the 2013 Undertale Kickstarter, Toby decided that if he could complete Undertale, Deltarune would be a mix of Undertale and the dream concept.[24] While Deltarune is not listed by its name on the Undertale Kickstarter, it is described as "another game".[25] In a post detailing the Kickstarter's last Stretch Goal, Toby states he will write scripts for Undertale comics and "Another game", which expands on Undertale's world and characters.[26] At the end of the post, Toby describes the other game as being "shrouded in darkness".[27] During and after the campaign, Toby had created image files of Susie.[20]

Initial development

Sometime in 2014 through 2015, Toby begun development for Deltarune by writing, sketching characters, and drafting concepts such as spells.[28] At an unspecified time, Toby shared early parts of Deltarune with Gigi D.G. and Chess.[29] From 2014 through 2015, Toby made concept art of the four main characters.[30] As of 2015, he had done sketches of Susie, Ralsei, and Noelle,[31] and had text files for possible dialogue and prompts.[32]

Following Undertale's release in September 2015, the game's success gave Toby more time to develop Deltarune.[33] He developed the Chapter 1 demo by himself, which took a few years longer than the Undertale Demo.[34]

Him increased contrast.png
him.png, from deltarune.com from 2016 to 2017, with increased contrast

As early as December 2015, deltarune.com's main page was entirely black. The site did not have a favicon or a page title, and only contained a low-contrast image titled him.png,[35][36] which uses the Wingdings font and featured a line from Undertale's unused Entry Number Seventeen. In two follow-up responses to Undertale's success, Toby's comments appear to hint at Deltarune and the site's appearance on December 31, 2015, as the last post mentions "a burning, inexplicable feeling", the very nature of which is "shrouded in darkness".[37][38][39]

From 2016 through 2017, the image was replaced and updated to have a line from Deltarune's prophecy. This line was also uppercase and in the same font: "THREE HEROES APPEARED TO BANISH THE ANGEL'S HEAVEN".[40] In July 2017, the Before the Story track was also teased as part of a PlayStation 4 Undertale dynamic theme for Undertale's console release.[41]

During the three years, Toby often woke up in the middle of the night, and was unable to sleep due to thinking about potential scenes for Deltarune.[42] He also begun properly studying Japanese to help Keiko Fukuichi with smoother translations, and occasionally offered ideas such as first person pronouns.[43][44][45] Toby was also supported by 8-4, Ltd. with the Japanese translation,[46] and the Fangamer staff consistently supported Toby in his projects.[47]

Upon completing Chapter 1, Toby was concerned about his mental health, and realized that it is "not possible" to develop Deltarune by himself and Temmie, as it is complex in programming, writing, cutscenes, and art. Thus, Toby wanted Deltarune to have a larger development team.[3] In his TwitLonger post, he admitted some concern as he has never directed a development team before.[48] The game's complexity also includes halting development for the UNDERTALE Alarm Clock, as Toby also wanted Chess to help develop Deltarune.[49] Unlike Undertale, Toby did not want to prepare a Kickstarter campaign for Deltarune.[50]

Overall development

For all people involved with its development, see Deltarune developers.
Deltarune Dark Fountain artwork.png
Promotional art of Susie, Kris, and Ralsei in front of a Dark Fountain for console release[51]

Post Chapter 1's PC release, 8-4 Ltd. published the console versions of Deltarune, starting from the Nintendo Switch and PlayStation 4 Chapter 1 demo in 2019. These versions and later versions have programming by returning programmer Sarah O'Donnell, who handles the console ports for Deltarune starting from 2019.[52]

During 2019, Toby also focused on overall development flow for the game.[53] This includes a readable outline for all Chapters, major events, and battles.[54] Toby intended everything to have a "never-before-seen gimmick", at the cost of development being inefficient.[55] In general, he considered working on each Chapter the equivalent to developing a game.[56]

In terms of playtesting, Toby's friends also play, who are also part of the Fangamer staff.[57] The game is also playtested by professionals for bugs on both languages and all consoles.[58] On release, the team actively searches for every bug that players may have so that it can be patched as soon as possible.[59]

As of Chapter 2, Toby works with the development team while being physically restricted from his wrist pains.[60] He has been primarily directing than programming, as he cannot program for long periods of time anymore.[61] Despite this limitation, Toby is highly involved. He gives feedback on any part of the game,[62] reads through all Japanese translated sentences,[63] occasionally goes on call to give explicit directions,[64] and ensuring that everything is enjoyable and matches his intentions for the story.[65]

Including Toby, the team has members working every day, with other people occasionally contributing with programming, art, and music.[66] Starting from Chapter 2, the main development team includes Temmie,[67] Sarah,[68] Taxiderby,[69] Fred Wood,[70] and Jean Canellas.[71] On September 2020, team applications were available for Chapter 3 onwards,[72] with up to 1,000 applications sent in less than a day.[73] During Chapter 2's development, AlexMdle and PureQuestion were hired as super testers,[74] and Sara Spalding assisted with difficult programming.[75][76] They all later became part of the main team as programmers for future Chapters.

Despite new people being hired, general delays occurred during Chapter 1&2 Demo's development and patching period. In March 2019 through May 2020, the team had largely spent time in search of an alternate game engine to GameMaker. In the end, Toby decided to stay with GameMaker as he felt as it was the "best fit for the project".[77] The 1&2 Demo was also made as a single project, which caused issues when patching the game.[78] The team had to retest each Chapter per patch until the game_change function was added by YoYoGames,[79] which was later tested publicly by players via the LTS 1&2 Demo.[80]

On October 2023, Toby announced that he hired a new producer to help speed overall development for later Chapters, starting from Chapter 4.[81] The new producer was later revealed to be Robert Sephazon on Deltarune's paid release.[82] In Spring 2024, Toby mentions that production has improved thanks to Robert Sephazon, and that new people were hired.[83] These new hires were later revealed to be Enjl,[84] Joost,[85] and Andy Brophy,[86] who all became part of the development team during Chapter 4's development.

Release

For all pre-release social media posts, see Voice § Outside of Deltarune.

Due to Chapter development being the equivalent to a game, most of the Chapters and the corresponding DELTARUNE Soundtracks have separate release dates. Each pre-release for the Chapter has a trailer, which is created by Everdraed,[87] and occasionally has music from guest contributors. The official deltarune.com website is often updated to reflect these releases, which is primarily performed by Ryan Alyea and Brian Coia. The voice also often makes pre-release posts on the official Bluesky and Twitter.

Chapter 1 was released for free on PC and Mac on October 31, 2018. The Chapter 1 soundtrack was released on November 1, 2018. Subsequent Chapter 1 demo versions for the Switch and PS4 was released in 2019, with Switch 2 and PS5 versions being a part of the paid release in 2025. In 2019, a Chapter 1 Spoiler-Free Trailer was released, and features DOGTARUNE (Trailer).[88]

Chapter 2 was released for free on PC and Mac on September 17, 2021 as part of the Deltarune Chapter 1&2 demo. The Chapter 2 soundtrack was released alongside the demo. The Switch and PS4 versions of the demo was released on September 23, 2021, with Switch 2 and PS5 versions being a part of the paid release in 2025. For Chapter 1&2 Demo's console release, the trailer has Toby in an Annoying Dog suit,[89] and has a fan-made rendition of Rude Buster by Rakuichi.[90][91]

Similarly to the paid release for Undertale, Toby made social media posts stating variants of "Deltarune tomorrow" prior to its release.[92][93] Both Temmie and Fred have also made similar posts on June 3, 2025.[94][95]

Deltarune's paid release was on June 4th 2025 on most platforms; it includes Chapters 3 and 4,[96][97] and the Chapters 3+4 soundtrack was released alongside it. The trailer for the paid release contains Toby returning in the dog suit, a polished arrangement of Game Main Theme (Piano Sketch) by Camellia,[98] and a sepia animation of the heroes by Temmie Chang.[99][5]

Chapter 5 is set to release in 2026 as a free update to the paid release; Chapters 6 and 7 will also be free updates,[6] but their release date is unknown.

Deltarune does not have a native Linux version, but the Windows version works on Linux using compatibility layers, and is verified on Steam for the Steam Deck. Although Undertale was ported to Xbox One, there has been no word on an Xbox version of Deltarune. This may be because game_change, a feature used in Deltarune as of 1&2 demo's v1.16, does not support Xbox.[100]

Version differences

Deltarune has received a number of patches, with the paid release being the full version of the game. It is periodically updated as its development continues. All console versions of Deltarune have optional dynamic borders, around the game.

The current versions are: PC/Mac: v1.05 Steam Beta Branch, consoles: v1.04

There are currently no plans for new patches for the current Chapters as of August 4, 2025.[101]

Anniversaries

For Undertale's Anniversaries, see ut:Anniversary.
Happy Halloween artwork.png
Art of Kris, Susie, and Ralsei in costumes for Deltarune's 6th Anniversary, by Temmie Chang[102]

Deltarune's official Anniversary date is October 31, which is Halloween and coincides with Chapter 1's PC release date. This Anniversary date is intentional.[103] However, events that pertain to Deltarune more often occur on Undertale's Anniversary date, which is September 15. This is due to Toby Fox also considering it a day to celebrate Deltarune.[104]

An overview of Deltarune Anniversary posts/related events is documented below:

Year Undertale Deltarune
2019 4th Anniversary 1st Anniversary
  • The official Twitter shares Temmie Chang's art depicting Kris raising the Annoying Dog up in the air, with Ralsei, Susie, Lancer and Temmie around them.[108]

  • Keiko Fukuichi responds to the Japanese version of this post and compliments the aforementioned art, particularly commenting on Lancer.[109]

  • In separate reply posts, Keiko reminisces about working on Chapter 1 with Toby and 8-4 Ltd., her thoughts on the tweet pre-release posts, happiness for the fans's reactions, and enthusiasm to work on the rest of Deltarune.[110][111][112][113][114][115]
2020 5th Anniversary
  • On deltarune.com, Toby shared a Chapter 2 and general update post for Deltarune, which particularly details about working with a developing team, his wrist and hand pains, and receiving up to 1000 development team applications.[117]
 2nd Anniversary

Keiko made a celebration post in response to the Japanese Undertale Twitter, and compliments the volume one LINE stickers.[118]

2021 6th Anniversary
Party overworld party hats.png
Susie, Kris, and Ralsei wearing party hats

It was a live playthrough of Deltarune's Chapter 1, which was modified for the stream. It includes text-to-speech commentary from Toby Fox,[120] and concluded with the surprise announcement of Deltarune Chapter 2's release two days later.[121] For Deltarune's featured songs, it includes Dog Check and primarily scrapped music tracks during the pre-stream. The latter is documented as outside the game files.

 3rd Anniversary

Toby recalls that Chapter 1 was released three years ago.[122]

Temmie shares a 3rd Anniversary art, depicting Kris being followed by Ralsei, Susie, Noelle, and Berdly. The Annoying Dog and Temmie are also present.[123]

2022 7th Anniversary
  • Toby made a tweet sharing the Sept 2022 Status Update.[124]

The Spamton Sweepstakes was announced as a part of the Sept 2022 Status Update on the Deltarune website, which was a twenty-four hour charity/auction campaign. It features Spamton, has pre-Deltarune anecdotes, Chapter 3 and 4 teasers and tracks hidden on deltarune.com.[125]


When the event occurred, Temmie shared art of the three heroes wearing party hats, and Susie biting a cake.[126]

 4th Anniversary

Temmie shares art of a Susie plush sitting and wearing a candle and a party hat.[127]


In a Tumblr post, Fred Wood shares art of Lancer posing in the Forest. He reminisces a bit about Chapter 1's release as an "unabashed fan", and expresses his opinion on it, praising it as "Undertale was kicked up a notch". Fred acknowledges that he now works on Chapter 2, and thanks Toby.[128]

2023 8th Anniversary

The ISSUE 4 - Autumn 2023 Newsletter has a message from Nelnal, the creator of Sweet Cap'n Cakes and Tasque Manager. Nelnal reminisces about being a fan of Chapter 1, and informs about Sweet Cap'n Cakes's development history and the trio's favored music genres.

 5th Anniversary
Party overworld costume swap.png
The party wearing mismatched costumes


Toby shares INTERVIEW: CHAPTER 2 DEVELOPMENT TEAM featuring Fred Wood, Jean Canellas, Taxiderby and Chess. The interview features unused content, art and concept processes, favorite projects during Chapter 2, memories from working with Toby Fox, and glitches.

2024 9th Anniversary

The ISSUE 7 - Autumn 2024 Newsletter was released. For Deltarune, Toby shared development progress for Chapters 3 - 5, Chapter 2's concept art and Chapter 2's unused music.

 6th Anniversary

Toby Fox shares Temmie Chang's art of Kris, Susie and Ralsei in Halloween costumes, with assorted pumpkins, and Dark Candy.[102] In a reply to this post, he confirms that Chapters 3 and 4 will release in 2025.[130] He also shares a "Roast Chicken" post depicting the Annoying Dog and a sped up version of A DARK ZONE.[131]


On December, Toby later recalls that Deltarune's 6th Anniversary has passed in the ISSUE 8 - Holiday 2024 Newsletter, and reminisces about the game's progress.[132]

2025 10th Anniversary 7th Anniversary
  • It was not actively celebrated, though Toby shared some of his friend's testimonials on the unfinished Chapter 5 before and after the Anniversary.[133][134][135]

Trivia

  • Deltarune is an anagram of Undertale.
  • The "deltarune" logo is stylistically lowercased, in contrast to the "UNDERTALE" logo being uppercase. Despite this, any in-game mention of the game's namesake is always uppercase, including most external content.[104] Some posts are exceptions and have "Deltarune" with regular title casing, such as post Chapter 1 release,[136][103][108][132] and before the paid release in 2025.[92]
  • The Chapter 1 demo, known as SURVEY_PROGRAM, has a user agreement that states that the player will "ACCEPT EVERYTHING THAT WILL HAPPEN FROM NOW ON." This dialogue is similar to the voice in-game, as it is in uppercase, and a similar question is asked in the introduction.
  • Prior to paid release, the Chapter 1&2 Demo originally described the game as a "program". It and deltarune.com in 2018 also described Deltarune as being intended for those who have finished or are already familiar with Undertale.[137][138]
  • deltarune.com/mobile/ is an unused subpage that states Deltarune is not compatible with mobile devices. It originally appeared when attempting to download Chapter 1 on mobile devices. As of April 2nd, 2025, the Deltarune Chapter 1&2 demo's "PC / Mac" button directly links to Deltarune's Steam page on all devices. There has been no word on mobile versions of Deltarune.

References

  1. ↑ It's a different world that might even have different rules. That doesn't mean there will be no connections at all though. — DELTARUNE FAQ (February 04, 2019.) deltarune.com.
  2. ↑ I am making a game called "DELTARUNE." It is the second game in the UNDERTALE series. — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  3. 1 2 Essentially it's not possible to make this game as one person (and Temmie).

    However, it MIGHT be possible to create the game if I'm able to make a team.

    So I'm going to try making a team. Because I really want to make this.     — Here are my thoughts on Ch 1 of Deltarune. This should answer some questions. (Fox, Toby, November 02, 2018.) twitlonger.com.
  4. ↑ As for DELTARUNE, it’s just not feasible from a development standpoint to support other languages right now, since it would make the game take longer to come out... — @tobyfox.undertale.com on Bluesky, March 29, 2026.
  5. 1 2 DELTARUNE Nintendo Switch 2 Announce Trailer on YouTube
  6. 1 2 DELTARUNE will cost $24.99.

    You only have to buy the game once - upcoming Chapters will be added as free updates.

    That's not factored into the cost, though. I only feel right charging for what there currently is, not what I say there will be.

    Therefore, this $24.99 to me represents the exact price of 4 Chapters!     — DELTARUNE CHAPTERS 1-4 RELEASE DATE ANNOUNCEMENT, Undertale/Deltarune Newsletter (April 02, 2025.) toby.fangamer.com.
  7. ↑ Thanks to Cross-Buy, when you buy DELTARUNE on the PlayStation Store, you get both PS4 and PS5 versions for one price!

    And...

    We're gonna do (basically) the same thing on Nintendo platforms! If you buy the game on Nintendo Switch and decide you want the Switch 2 version later, you can get it at no additional cost!* And vice-versa!     — DELTARUNE CHAPTERS 1-4 RELEASE TIME ANNOUNCEMENT, Undertale/Deltarune Newsletter (Fox, Toby, May 08, 2025.) toby.fangamer.com.
  8. ↑ All DELTARUNE / UNDERTALE content that releases will be noted on official accounts and be credited to "Toby Fox". If you see a strange post or tweet that looks like it's from me, check the spelling of the username to make sure. — fwugradiation on Tumblr, October 13, 2022.
  9. ↑ The UNDERTALE / DELTARUNE mailing list is now open! Sign up to receive updates whenever there's news on UT / DR! (And, since there's usually no news, we'll be sending out a fun newsletter next month, too.) undertale.com/newsletter/ — November 20, 2022.
  10. ↑ My goal is that if someone wants to casually replay a Chapter from scratch, or if they start playing on a brand-new platform, there's no hurdle to jumping back into the game. Normally, it would be really discouraging to have to start a long game like this over from the beginning... I hope this encourages many players to play more lightheartedly. — DELTARUNE GAMEPLAY REMINDER CHEAT SHEET (Fox, Toby, June 01, 2025.) deltarune.com.
  11. ↑ Pressing or holding the cancel button causes a text box's contents to display instantly. This is really important if you read quickly. — DELTARUNE GAMEPLAY REMINDER CHEAT SHEET (Fox, Toby, June 01, 2025.) deltarune.com.
  12. ↑ Holding the Menu button will rapidly skip and advance through text. This is very useful when replaying part of the game (since there is no dedicated cutscene skip), but it will probably ruin the Chapter if you abuse it the first time you play. — DELTARUNE GAMEPLAY REMINDER CHEAT SHEET (Fox, Toby, June 01, 2025.) deltarune.com.
  13. ↑ working on playing card designs for one of my classes. — kanotynes on Tumblr, March 15, 2012.
  14. ↑ Treat them like one of your ITEMS!

    This official deck of DELTARUNE playing cards was designed by Kanotynes. It includes 52 illustrated cards, two jokers, and two rules cards.     — DELTARUNE - DELTARUNE Playing Cards - Fangamer (March 31, 2026.) fangamer.com.
  15. ↑ 2011年、大学在学中に家を離れて暮らしていた頃に、派手に体調を崩してしまったことがあったんです。薬も手に入らなくて、高熱にうなされながら寝ていたら、すごく鮮明な夢を見ました。

    それはゲームのエンディングの夢で、以来、「あのエンディングのゲームを作らなきゃ」、っていう思いに取りつかれてしまって。     — 『DELTARUNE Chapter 1』が2/28に配信決定 (Indie World, February 19, 2019.) nintendo.com/jp.
  16. ↑ I’D PLAY WITH THESE — fwugradiation on Tumblr, April 05, 2012.
  17. ↑ In 2012 I saw her designs for some playing-card inspired characters on tumblr and decided I wanted to make a game featuring them. It didn't end up going anywhere, but the idea of "I want to make an RPG" stuck with me. — November 02, 2018.
  18. ↑ He contacted me to ask if it was ok to use my designs well before he started work on any game. It’s such ancient history to me now, it feels pretty wild to see them again taking on a life of their own out there. — kanotynes on Tumblr, November 26, 2018.
  19. ↑ I'm looking through what I think is the oldest text document about DELTARUNE that I can find. This is one of the first facts about Susie. Even though this has never happened in the game, everyone just intuitively understands this as true. I won. — @tobyfox.undertale.com on Bluesky, June 29, 2025.
  20. 1 2 ... because I was waiting. — November 01, 2018.
  21. ↑ それで、2012年に一度、作ろうとしてみたんです。Tumblrで見つけたKanotynesというアーティストがとても好きで、その人のキャラクターデザインを使ったんですけど、そのときは結局、部屋をひとつも完成させることなく、開発を断念してしまいました。 — 『DELTARUNE Chapter 1』が2/28に配信決定 (Indie World, February 19, 2019.) nintendo.com/jp.
  22. ↑ This song wasn't made for Undertale either. It (and bonetrousle) were the main battle themes of an RPG game I was working on before Undertale, based off a dream I had. However, I didn't plan it very well, so the project fell apart before I accomplished a single room. — March 08, 2024.
  23. ↑ The idea of "I want to make an RPG" turned into UNDERTALE and the original idea I had transformed into DELTARUNE as I was making UNDERTALE. — November 02, 2018.
  24. ↑ そして、Kickstarterで『UNDERTALE』への出資を募った頃（2013年）、もし『UNDERTALE』を完成させることができたら、次のゲームは『UNDERTALE』とあの夢の構想をミックスさせたものにしよう、と決めたんです。 — 『DELTARUNE Chapter 1』が2/28に配信決定 (Indie World, February 19, 2019.) nintendo.com/jp.
  25. ↑ Any money left over after the game's development will go towards extending the world of UnderTale outside of the game... maybe through another game! — UnderTale by Toby Fox (Fox, Toby, July 08, 2013.) kickstarter.com.
  26. ↑ With this amount of money, I will be able to show you more of Undertale's world and characters. Two ideas I have for this are:

    - Comics

    - Another game

    At $45000, after the development of Undertale, I will write the scripts to these two things.     — UnderTale by Toby Fox » $37500 met... final stretch goal ($45000) — Kickstarter (Fox, Toby, July 16, 2013.) kickstarter.com.
  27. ↑ The "other" game... I can't tell you anything about it. Its very nature is shrouded in darkness. Ha ha ha. — UnderTale by Toby Fox » $37500 met... final stretch goal ($45000) — Kickstarter (Fox, Toby, July 16, 2013.) kickstarter.com.
  28. ↑ あるキャラクターに炎のまほうを使わせようと思っていたんですが、チャプター1ではやめておくことにしました。 — 『DELTARUNE Chapter 1』が2/28に配信決定 (Indie World, February 19, 2019.) nintendo.com/jp.
  29. ↑ Toby: I still have memories of showing you and Chess a dramatic battle from UNDERTALE in a hotel room… I remember it was the first time I had shown the battle to anyone else. Wasn’t that the battle with Sans? Do you guys remember this? Also I will also include Chess for this question. Chess come here.

    Gigi: I think some memories might be blending together here. I do remember when you showed me the Undyne the Undying battle in a hotel hallway, having to quickly flip down your laptop whenever someone stopped to talk. I also remember when you showed Chess and me the early parts of DELTARUNE the night before we went to Korea.     — SPECIAL NEWSLETTER SPOTLIGHT & INTERVIEW - GIGI - Toby Fox and Gigi (Fox, Toby, February 14, 2024.) toby.fangamer.com.
  30. ↑ Original DELTARUNE concept art of the main characters from 2014 or 2015??? The file was just called "THE FUN GANG" — November 16, 2018.
  31. ↑ First ever sketches of Noelle, Ralsei, and Susie from April 2015 — April 27, 2025.
  32. ↑ Looking through old files and these dialogue choice options from 2015 ended up kinda accurately reflecting how people feel LOL — November 04, 2018.
  33. ↑ I've said it many many times before, but I didn't expect the simple game I made to receive so much attention. Because of that, many interesting things have happened, and now I can even spend my time making another game. — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  34. ↑ When I made the demo of UNDERTALE, I made it to prove to myself that it was possible to make a whole game alone (with some help with the art).

    Because I was able to make it in a few months, I felt that I had proved that it was possible.

    However, making the demo of DELTARUNE...

    took a few years.     — Here are my thoughts on Ch 1 of Deltarune. This should answer some questions. (Fox, Toby, November 02, 2018.) twitlonger.com.
  35. ↑ Dreemurr 3.1 FAQ comment - reddit.com, December 8, 2015.
  36. ↑ @FwugRadiation is deltarune.com official — December 08, 2015.
  37. ↑ The success of "UNDERTALE" has been incredible. Thank you to the artists, the fans, and to my friends for supporting me in 2015. — December 31, 2015.
  38. ↑ But, lately, something has left me feeling unsettled. A burning, inexplicable feeling...

    You could say,     — December 31, 2015.
  39. ↑ "Its very nature is shrouded in darkness." — December 31, 2015.
  40. ↑ (image) —   (Fox, Toby, August 17, 2016.) deltarune.com.
  41. ↑ UNDERTALE PlayStation 4 Dynamic Theme "Ruins" on YouTube
  42. ↑ For the past 3 years I've been waking up in the middle of the night unable to go back to sleep because I've been thinking about the scenes that happen in the game.

    Even though so many details are still hazy,

    I really want to show you the things I've been thinking about.

    That's really my only reason for making this game.     — Here are my thoughts on Ch 1 of Deltarune. This should answer some questions. (Fox, Toby, November 02, 2018.) twitlonger.com.
  43. ↑ ちなみに、今年は日本語をちゃんと勉強していたので、今回は日本語版の翻訳をもっと手伝えました。

    例えば、スージィを　「俺使い」、　ランサーを　「僕様使い」　というキャラクターにしたのは僕の発想でした。（ヨホ）     — November 02, 2018.
  44. ↑ 原作者が真剣に日本語版のことを考えて提案をしてくださって、そこに刺激を受けてこちらもいろんなアイデアが浮かんできて…という体験は、なかなかないです。@tobyfox さんとのお仕事はいつも刺激的で、自分のMAXパワー以上のものを引き出していただいている気がします。140字じゃ伝えきれない感謝… — November 03, 2018.
  45. ↑ . @tobyfoxさんのすばらしいところは、「こんなふうにしてほしい」という方針を明確に示してくれた上で、「翻訳者はあなただから、僕の意見はあくまでも参考です」と、翻訳の実作業については常にこちらを信頼して任せて下さるところ。まさに過不足のない監修とはこういうことだなと頭が下がります — November 04, 2018.
  46. ↑ I also want to say thanks to 8-4 Ltd. for translating the game to Japanese and supporting me in a lot of other ways just to make something good happen, they're amazing. We all worked on the translation really hard!! — November 02, 2018.
  47. ↑ And special thanks to @fangamer for always supporting me in whatever I do. They're good people and always looking out for my best interests somehow. — November 02, 2018.
  48. ↑ But I may not be able to succeed because I have no experience successfully directing a team and I have no idea who I'm going to work with. — Here are my thoughts on Ch 1 of Deltarune. This should answer some questions. (Fox, Toby, November 02, 2018.) twitlonger.com.
  49. ↑ Development on the app has halted due to various circumstances, including asking the app developer to help with the development of DELTARUNE instead. — UNDERTALE 5th Anniversary Alarm Clock Winter Dialogue (Fox, Toby, September 15, 2020.) undertale.com.
  50. ↑ 9. "Will you do a Kickstarter?"

    I still haven't finished that damn Alarm Clock, are you kidding me?

    There's no way I'm doing a Kickstarter this time.     — Here are my thoughts on Ch 1 of Deltarune. This should answer some questions. (Fox, Toby, November 02, 2018.) twitlonger.com.
  51. ↑ DELTARUNE Nintendo Switch 2 Instagram Trailer, May 29, 2025.
  52. ↑ aw yes! now that it’s been announced I can finally share that I’m handling both the Switch and PS4 ports of Deltarune (*´∇｀*) (enlisted by 8-4, naturally) — February 14, 2019. Archived on September 13, 2020.
  53. ↑ The game will be released in many "Chapters", the first of which I released two years ago on Halloween. Since that time, I've been working hard to figure out the rest of the game. — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  54. ↑ The good news is that a few months ago, I completed a significant milestone regarding the game's design. I completed readable outlines for every chapter in the game, including first-pass dialogue for almost all the cutscenes, examples of the music, etc.

    Although certain details are still hazy, the flow of the game and all major events and battles that take place are now clear.     — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  55. ↑ “In Deltarune, we can’t rely on just tweaking numbers. Everything in the game is simply a container for a never-before-seen gimmick. Every enemy has new bullet patterns, new [actions], every area has new puzzles, etc. I don’t necessarily think this is a good or bad thing, after all Final Fantasies are some of my favorite RPG’s... but the method that I have chosen is not very efficient for development.” — Inefficient And Laborious – The Ongoing Path To Making Deltarune (Diaz, Ana, September 30, 2025.) gameinformer.com.
  56. ↑ That being said, I do feel like calling each episode a "Chapter" really undersells the fact that creating each one is like developing its own game. I've made the equivalent of like 2 and a half Undertales at this point. Continuously. — "I've Made The Equivalent Of Like 2 And A Half Undertales At This Point"- A Quick 'Deltarune' Chat With Toby Fox (Grassl, Zion, December 30, 2025.) nintendolife.com.
  57. ↑ Chapter 3 is pretty much content complete! There will be essentially no more changes to dialogue or gameplay from here. Hooray!

    On my birthday, a friend came over to my house and played through the whole thing.

    It was very gratifying to see them laugh at all of the stupid jokes we've labored over for years. It took a long time to get here, but now it feels like everything will be downhill.

    After they completed it, I asked "did anything seem incomplete" and they mentioned that "the bullets seemed kind of hard..."

    I nodded and forgot about this feedback immediately.     — Halloween 2023, Undertale/Deltarune Newsletter (Toby Fox, October 31, 2023.) toby.fangamer.com.
  58. ↑ Fortunately, we have a dedicated company that will test our game and help! A group of professionals will play the game cumulatively hundreds of times, in both English and Japanese, and on every console. — QUESTS TO COMPLETE CHAPTER 3&4!! - Toby Fox (Fox, Toby, July 30, 2024.) toby.fangamer.com.
  59. ↑ Hope you guys are enjoying the new chapters!

    Our team has been watching out like hawks for every single softlock, crash, and other issue, and we are already working hard to resolve all of them ASAP! We will be trying to put out a patch as soon as we are able.     — June 05, 2025.
  60. ↑ I'm extremely grateful to have a team helping me carry out my design especially because of my disabilities, which have also made development more difficult. — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  61. ↑ 「Chapter 1」と『UNDERTALE』は全編僕ひとりでプログラミングしましたけど、手首を痛めてしまったせいで、今はもう、あんまり長時間プログラミングできなくて……なので、「Chapter 2」は90％ぐらい、チームの別のメンバーがプログラミングしました。そう、僕は今回から、ディレクターになったんです（ベレー帽をかぶった、プロフェッショナルなイヌをご想像ください）。

    人に指示をすること自体は、簡単です。でも、自分の頭の中にあるものを、そっくりそのまま人に作ってもらうのは……自分でやるより10.2倍ぐらい大変なんですね！     — つづきのはじまり。『DELTARUNE Chapter 1&2』がNintendo Switchで本日配信開始。 (Indie World, September 24, 2021.) nintendo.com/jp.
  62. ↑ Although it's no longer a solo project, I tried very hard to communicate my vision. I designed and wrote everything. I gave feedback on literally every single part of the game. Thanks to everyone, we were able to complete the chapter a lot faster than I could ever do it by myself. I'm very proud of the team, so please look at the credits. — DELTARUNE Status Update - Sept 2021 (Fox, Toby, September 15, 2021.) deltarune.com.
  63. ↑ 「僕のゲームを気にかけてくれて、ありがとうございます！ 「Chapter 2」をリリースしたころと比べて、僕は日本語がずっと上達しました。なので、上がってきた日本語訳を、1行1行全部この目でチェックすることができました。ハチノヨンさんと、すばらしい翻訳者の福市恵子さんのお仕事に、僕の監修も加わって、最高の日本語訳に仕上がったという自信があります。 — 「Hello! インディー」『DELTARUNE』の開発者トビーさんにインタビュー（後編） (Indie World, June 05, 2025.) nintendo.com/jp.
  64. ↑ So, I don't actually program anything any more. Occasionally I do go on call with somebody and tell them exactly what to do, however. — Debug #10 (Oakwood, James, May 28, 2025.) teamdebug.com.
  65. ↑ As the director my main concern is whether something is fun and matches my intention for the story. — Inefficient And Laborious – The Ongoing Path To Making Deltarune (Diaz, Ana, September 30, 2025.) gameinformer.com.
  66. ↑ Other than me, there are about three active team members working day-to-day, with a few other people pitching in from time to time. — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  67. ↑ Temmie has stuck with the project doing the art for about five years now. I don't think she really needs an introduction. Almost everything in the game was drawn by her. — DELTARUNE Status Update - Sept 2021 (Fox, Toby, September 15, 2021.) deltarune.com.
  68. ↑ And Sarah has been working on Deltarune since she brought Chapter 1 to Nintendo Switch in 2018. — DELTARUNE Status Update - Sept 2021 (Fox, Toby, September 15, 2021.) deltarune.com.
  69. ↑ I joined the core team very early, so I was actually working on developing bullets before Chapter 2's development started proper. — CHAPTER 2 DEVELOPMENT TEAM INTERVIEW - Toby Fox, Fred Wood, Jean Canellas, Taxiderby, Chess (Taxiderby, October 31, 2023.) toby.fangamer.com.
  70. ↑ A game developer from San Antonio, TX! Joined early on in Chapter 2. Mostly handles overworld stuff. — CHAPTER 2 DEVELOPMENT TEAM INTERVIEW - Toby Fox, Fred Wood, Jean Canellas, Taxiderby, Chess (Fox, Toby, October 31, 2023.) toby.fangamer.com.
  71. ↑ A game developer of souls-like platformers. Handles all of the battle stuff besides bullets. And some bullets. Joined a few weeks after Fred. — CHAPTER 2 DEVELOPMENT TEAM INTERVIEW - Toby Fox, Fred Wood, Jean Canellas, Taxiderby, Chess (Fox, Toby, October 31, 2023.) toby.fangamer.com.
  72. ↑ Chapter 2 is proceeding at a good pace, so if we do take anyone on, it will probably only be for Chapter 3 onward. So please understand that anything you send in may not have an immediate result. — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  73. ↑ UPDATE 9/16: Amazingly, we already received 1000 applications of various types. We'll look these over now. Thank you everyone for the applications! — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 16, 2020.) deltarune.com.
  74. ↑ As a few people have already noticed, Alex and I (PureQuestion) are credited as "Super Testers" for DELTARUNE Chapter 2.

    We were brought on pretty recently, but it's been a really exciting opportunity,

    Thank you @tobyfox and the rest of the team!

    See you all next time.     — September 18, 2021.
  75. ↑ :) :) :) — September 18, 2021.
  76. ↑ SaraJS - Did various visual effects, and difficult programming things. Helped out with lighting, ripples, prophecies on Chapter 4. Now creating cutscenes in Chapter 5. — CHAPTER 3 and 4 LOOK BACK! (Fox, Toby, December 18, 2025.) toby.fangamer.com.
  77. ↑ We had actually attempted to develop the game since the time too. Development started around March 2019 and a 99% work was spent on investigating engines alternate to GameMaker, which I used for Chapter 1.

    Without getting into the details, I decided a few months ago to go back to GameMaker after all. It still felt like the best fit for the project. So using Chapter 1 as a base, we've started creating Chapter 2 since May 2020.     — DELTARUNE Status Update - Sept 2020 (Fox, Toby, September 15, 2020.) deltarune.com.
  78. ↑ For Chapter 1 & 2 DEMO, we initially committed the strange act of smashing both chapters together into one game project. It wasn't such an issue with only 2 chapters, but as the game progresses, doing something like that will become more and more troublesome. — QUESTS TO COMPLETE CHAPTER 3&4!! - Toby Fox (Fox, Toby, July 30, 2024.) toby.fangamer.com.
  79. ↑ When editing the combined project, we wouldn't know if anything during the process might have inadvertently affected anything at any point in the game… So, each time we patched ANY chapter, we would have to test ALL the Chapters over again. — QUESTS TO COMPLETE CHAPTER 3&4!! - Toby Fox (Fox, Toby, July 30, 2024.) toby.fangamer.com.
  80. ↑ We are testing a new command to switch Chapters in Deltarune Chapter 1&2. If you would like to test, please see the attached images and report any issues (mainly if it doesn't work...) with this Google form.

    https://docs.google.com/forms/d/e/1FAIpQLSfje4X4PX7o11NJuZFN5u6bPMe_ILFx4enzw8zA86dvktWI6w/viewform

    Thanks!     — @tobyfox.undertale.com on Bluesky, November 25, 2024.
  81. ↑ Chapter 4 already has a very substantial amount of cutscenes and enemy work done. Also, I've hired a new producer whose entire job it will be to speed up the overall game development for future chapters. — Halloween 2023, Undertale/Deltarune Newsletter (Toby Fox, October 31, 2023.) toby.fangamer.com.
  82. ↑ I am honored to finally reveal my role as the producer for Deltarune!

    It has been a rewarding experience working with @tobyfox.undertale.com and this talented team. On behalf of everyone, we hope you enjoy playing!

    Here is a totally legit [citation needed] photo with Toby™, we promise.     — @sephazon.bsky.social on Bluesky, June 04, 2025.
  83. ↑ Thanks to increased management power provided by my new producer, we've been able to hire a few more people onto the team! Everyone's only been working on the team for a little over a month and a half, but it's making a real difference already. The producers M.O. is, "for the fan's sake, let's finish this before we become old and wrinkled" ... I agree! (instantly stops being wrinkled)

    The other news…

    Chapter 4 development is going better than ever. We are on track to meet our internal deadline. The new hires are already making a great difference to improve the atmosphere and feel of the chapter.     — Spring 2024, Undertale/Deltarune Newsletter (Fox, Toby, May 16, 2024.) toby.fangamer.com.
  84. ↑ Enjl - Handled the Titan Tower and a few overworld rooms in Chapter 4, all the Switch 2 exclusive content, and Pluey. Now the main overworld programmer of Chapter 5. — CHAPTER 3 and 4 LOOK BACK! (Fox, Toby, December 18, 2025.) toby.fangamer.com.
  85. ↑ Joost - He did the tiling and assembled visual and background details for Chapter 4 and Chapter 5! — CHAPTER 3 and 4 LOOK BACK! (Fox, Toby, December 18, 2025.) toby.fangamer.com.
  86. ↑ Andy - He created 3 Michaels, and the games Jongler & Battat. Now working on things even he doesn't even know what they are. Created the game Knuckle Sandwich. — CHAPTER 3 and 4 LOOK BACK! (Fox, Toby, December 18, 2025.) toby.fangamer.com.
  87. ↑ Also I dropped this
    💪🦵🦶👂👃🧠🫀🫁🦷🦴👀👁️👅
    It's Everdraed who did an amazing job making the trailer, can someone put him back together please     — April 03, 2025.
  88. ↑ DELTARUNE Chapter 1 Spoiler-Free Trailer on YouTube
  89. ↑ If you missed the Nintendo Direct, then you missed Deltarune Chapter 1&2 being announced by me breaking through a wall in a giant dog suit!
    https://youtu.be/HeGRmqAF_38     — September 23, 2021.
  90. ↑ By the way, the awesome trailer music was by Rakuichi, whose Rude Buster cover I always really liked!
    ちなみに、動画で流れている「ルードバスター」は、僕の大好きなカバーバージョンを制作してくれた、らくいちさんによる新アレンジ版です。
    https://youtu.be/wGtv-NH2XTQ     — September 23, 2021.
  91. ↑ DELTARUNE Chapter 2 – Announcement Trailer – Nintendo Switch on YouTube
  92. 1 2 Deltarune............................................................ tomorrow! — @tobyfox.undertale.com on Bluesky, June 03, 2025.
  93. ↑ DELTARUNE TOMORROW — June 03, 2025.
  94. ↑ wow deltarune tomorrow — @tuyoki.bsky.social on Bluesky, June 03, 2025.
  95. ↑ deltarune tomorrow — @fredtwood.com on Bluesky, June 03, 2025.
  96. ↑ DELTARUNE Chapters 1-4 will be released on June 5th as a launch title for Nintendo Switch 2! It's also coming to Steam, Switch, PS4, and PS5 the same day! — April 02, 2025.
  97. ↑ Anyway, the takeaway is that if you're reading this in English, there's a good chance you'll actually be able to get the game on JUNE 4th! — DELTARUNE CHAPTERS 1-4 RELEASE TIME ANNOUNCEMENT, Undertale/Deltarune Newsletter (Fox, Toby, May 09, 2025.) toby.fangamer.com.
  98. ↑ I helped the arrangement & production of the trailer music of DELTARUNE Nintendo Switch 2 Trailer! 🥳

    ダイレクトでも流れたDELTARUNE Nintendo Switch 2トレーラーの音楽のアレンジと制作をお手伝いしました！DELTARUNE Nintendo Switch 2 Announce Trailer https://youtu.be/yDzgiGdekas?si=2dyXiT8MCnS1hA1A     — April 02, 2025.
  99. ↑ Camellia you dropped this for arranging and producing the music👑👑
    Temmie you dropped this 🐈
    But also you drew the amazing sepia trailer-only animation so Camellia give her one of the👑please     — April 03, 2025.
  100. ↑ game_change in the GameMaker manual
  101. ↑ DELTARUNE has been updated to version 1.04 on all platforms. Changes are attached.

    1.05 only contains minor changes. We have no other patches planned at this time.     — @undertale.com on Bluesky, August 04, 2025.
  102. 1 2 Happy Halloween! (And 6th Anniversary to DELTARUNE!)

    >Illustration by @tuyoki.bsky.social     — @tobyfox.undertale.com on Bluesky, October 31, 2024.
  103. 1 2 The DEMO (first chapter) of my game is supposed to come out on Halloween. — Here are my thoughts on Ch 1 of Deltarune. This should answer some questions. (Fox, Toby, November 02, 2018.) twitlonger.com.
  104. 1 2 Although it's technically UNDERTALE's anniversary, I consider this day to be a celebration of DELTARUNE, as well. Sorry guys, you have to share a birthday party this year… — ISSUE 7 - Autumn 2024, Undertale/Deltarune Newsletter (Fox, Toby, September 14, 2024.) toby.fangamer.com.
  105. ↑ This is the last thing you see before you die. — September 15, 2019.
  106. ↑ 🎵Welcome to the CITY🎵 — September 15, 2019.
  107. ↑ Of course, that's not the only version of that song. Lots and lots of things happen. I just hope you can be friends with everyone someday. — September 15, 2019.
  108. 1 2 Happy 1st Anniversary to Deltarune Chapter 1! (and Happy Halloween!) — October 31, 2019.
  109. ↑ 『 #DELTARUNE Chapter 1』、リリース1周年、おめでとうございます！ついこの前のことのようでもあり、ずいぶん昔のことのようでもあり… 不思議な感覚ですね。

    そしてテミーさんの1周年記念イラストが萌ゆい。ランサーくんのおなかをモチモチしたい。どう見ても0歳児だろこれ。萌ゆい。     — October 31, 2019.
  110. ↑ この作品も世界同時リリースだったので、リリース直前までとても大変だったことをよく覚えています。でも、トビーさん、ハチノヨンの皆さんと一緒に、みんなでひとつの作品を作り上げていく作業は、本当にやりがいのあるものでした。 — October 31, 2019.
  111. ↑ 大変だったけど、そのぶん尊さも増し増し。プレイヤーの皆さんに楽しんでいただけたときのうれしさは、増し増し増し増し！でした！！ — October 31, 2019.
  112. ↑ たしか去年の10/31は飲み会に誘われていて、でも、夜10時からの「連続ツイートリリースイベント」のことを思って、お断りしたんだった — October 31, 2019.
  113. ↑ 私がツイートをするわけじゃなかったけど、あんなリリースのしかたをするゲームは初めてだったし、「うまくいくだろうか（ドキドキドキ…」と内心気が気じゃなくて、万一何かトラブルが発生した場合に備えて待機しておきたかったんですよね。 — October 31, 2019.
  114. ↑ こんなプロジェクトが進行してること自体、完全シークレットだったから、飲み会誘ってくださった方にはホントの理由を言えないまま、「ちょっと仕事が…」みたいな感じでお断りしたのを覚えています… ゴメンやで… — October 31, 2019.
  115. ↑ Chapter 2 以降の完成、私も楽しみにしてます！ヾ(´▽｀)ﾉ ハッピーハロウィーン！ — October 31, 2019.
  116. ↑ Thanks for listening to my messy piano playing at the end too. The first piece was an arrangement of a song from DELTARUNE, the last two were UNDERTALE songs with improvisations. The middle one especially (Snowdin arrangement) I just randomly made up for the concert — September 16, 2020.
  117. ↑ DELTARUNE Status Update - Sept 2020
  118. ↑ DELTARUN Chapter1 リリース2周年、おめでとうございます！🎉

    DELTARUNE スタンプ、超絶かわゆいのです！
    みんな、使ってほしいのです！🎃     — October 31, 2020.
  119. ↑ UNDERTALE's 6th anniversary DELTARUNE event is in less than 24 hours! Just finished rehearsal and the set is looking awesome. Make sure to check it out 7PM ET/4PM PT!

    We'll be playing some rarely heard UT/DR songs about 20 minutes before the show, too.     — September 15, 2021.
  120. ↑ On 9/15, me and 3 dads from Fangamer will be streaming DELTARUNE Chapter 1 with live commentary. (I'll join with text-to-speech.)
    We've never done something like this before so it might be a little rough, but I think it will be a lot of fun too.

    Will post a link when it's close!     — September 08, 2021.
  121. ↑ DELTARUNE Chapter 2 will release at 8PM ET on 9/17.
    Thanks for waiting.
    deltarune.com     — September 16, 2021.
  122. ↑ It's Halloween... and DELTARUNE Chapter 1 was released 3 years ago.

    3 years already...

    ... maybe that's the scariest of all.     — October 31, 2021.
  123. ↑ anniversary!! \( ᐛ )/ — October 31, 2021.
  124. ↑ Happy 7th Anniversary to UNDERTALE!
    Here's a small status update on the progress of DELTARUNE.     — September 15, 2022.
  125. ↑ But as a treat to those fans who got a little something burning in their spacious pockets, this year we're creating a specil event -- SPAMTON SWEEPSTAKES, a SUPER SPECIL prize sweepstakes / charity auction starting Saturday 12PM PDT and running for 24 hours right here on deltarune.com ! And don't worry -- it will have content for Spamton Lovers and Haters alike! — DELTARUNE Status Update Sept 2022 (Fox, Toby, September 15, 2022.) deltarune.com.
  126. ↑ little celebration — September 17, 2022.
  127. ↑ habby — October 31, 2022.
  128. ↑ Happy Anniversary #Deltarune Chapter 1! Here's a Lancer, and my thoughts. :)

    (image)     — October 31, 2022.
  129. ↑ All right, back to Halloween. Ready for a scary fact?

    Halloween... is technically the 5th Anniversary of DELTARUNE.

    ... that was scary, wasn't it?

    For this special day, I've interviewed some of the Development Team of DELTARUNE Chapter 2! Let's reminisce on some standard memories about developing the game!     — Halloween 2023, Undertale/Deltarune Newsletter (Fox, Toby, October 31, 2023.) toby.fangamer.com.
  130. ↑ I'm very eager to show you what we've made since 6 years ago.

    The specific time is still relying on localization and console porting.

    Please hear me clawing at the door trying to escape the shallow coffin I have been buried in.     — @tobyfox.undertale.com on Bluesky, October 31, 2024.
  131. ↑ (video) — @tobyfox.undertale.com on Bluesky, October 31, 2024.
  132. 1 2 Deltarune reached a 6th Anniversary.

    Since UNDERTALE came out, 9 years passed, and I only released 2 Chapters of DELTARUNE so far.

    Internally, Chapter 3&4 are basically completed besides translation and bug testing... they are frozen... waiting to be released...     — ISSUE 8 - Holiday 2024, Undertale/Deltarune Newsletter (Fox, Toby, December 18, 2024.) toby.fangamer.com.
  133. ↑ I had a friend play through an early unfinished version of Chapter 5!

    Their testimonial was "I am still thinking about it a lot and want to play it more and it's kawaii when toby is worried about if it's good enough"     — @tobyfox.undertale.com on Bluesky, October 27, 2025.
  134. ↑ I showed another friend.

    Their testimonial was "What's the opposite of 'I miss Tenna?'"     — @tobyfox.undertale.com on Bluesky, November 04, 2025.
  135. ↑ My friend said this affectionately as a joke and perhaps it doesn't have a deep meaning. They liked the game. — @tobyfox.undertale.com on Bluesky, November 04, 2025.
  136. ↑ Here are my thoughts on Ch 1 of Deltarune. This should answer some questions.

    Read: tl.gd/n_1sqn3p9     — November 02, 2018.
  137. ↑ This program is intended for players who are already familiar with UNDERTALE. — Deltarune Chapter 1&2 Demo initial load screen, Chapter 1
  138. ↑ This is intended for people who have completed UNDERTALE. — DELTARUNE (November 02, 2018.) deltarune.com.
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