Newsletter

The Undertale/Deltarune Newsletter is a free email system for new Undertale and Deltarune-themed content, merchandise, and updates on any of Toby Fox's other projects. He also shares personal commentary and occasional art for the newsletter topics.

It was first mentioned on November 18, 2022 on Toby Fox's official Twitter, and was announced on the official Undertale Twitter on November 20, 2022. Newsletter releases may also be announced via the official websites, or on social media such as the official Undertale Bluesky and Toby's Bluesky.

An archive of all released newsletters can be found on Toby Fox's Fangamer webpage. The archived newsletters are "Truck Freak" tier, and are sorted by the newest at the top of the page, and the older newsletters at the bottom. Certain Newsletter content in the archive is also slightly altered from the email version.

Mailing Tier Lists

Users can sign up on the official Undertale website or Deltarune website for free to receive newsletter updates in the form of emails. Users can also optionally input their name and favorite food, which can appear exclusively in the email version of the newsletter. There are four types of Mailing List tiers:

• MINIMAL: This tier list will only email to announce when Deltarune's next Chapter will be released.
• NORMAL: This subscription is for the seasonal newsletter for both Undertale and Deltarune, including games and events such as Deltarune's Spamton Sweepstakes.
• SUPER: This subscription includes updates for all of the above, and any new content Toby Fox is working on, such as original songs.
• TRUCK FREAK: Selecting this includes emails for any type of content. This includes the accidental "Foam Shower Tier" on April 1, 2023.

Information Summaries

The original newsletters are linked via the newsletter's release date. Newsletters are documented from oldest on top, to newest. Most Newsletters come in three sections: Deltarune News, Collaborations, and Merchandise, and several more with additional content. Themed sprites and art of the Undertale and Deltarune cast are spread to compliment each newsletter, which were created by Temmie Chang.

ISSUE 1 and ISSUE 2 also feature "Seasonal Comics", which were intended to be a trend with newsletters. These comics appear to be one of Undertale Kickstarter's stretch goals.

• ISSUE 1 - Winter 2022
• ISSUE 2 - Spring 2023
• ISSUE 3 - Summer 2023
• ISSUE 4 - Autumn 2023
• Halloween 2023
• ISSUE 5 - Winter 2024
• Spring 2024
• ISSUE 6 - Summer 2024
• ISSUE 7 - Autumn 2024
• ISSUE 8 - Holiday 2024
• DELTARUNE CHAPTERS 1-4 RELEASE DATE ANNOUNCEMENT
• DELTARUNE CHAPTERS 1-4 RELEASE TIME ANNOUNCEMENT
• DELTARUNE CHAPTERS 3+4 RELEASE NEWSLETTER
• UNDERTALE DELTARUNE NEWSLETTER FALL 2025
• UNDERTALE/DELTARUNE NEWSLETTER WINTER 2025

ISSUE 1 - Winter 2022

Fridge Mettaton with a gun, Bean Sans wearing a Santa hat saying 'memy christmas,' and a tiny Starwalker labeled 'and the new...?'

Sent out on December 20, 2022, a news recap was included in this newsletter due to lack of development updates.

It provides a brief summary of the Spamton Sweepstakes and the September 2022 Status Update. For the former, Toby announces that the Spamton Sweepstakes had two "endings" prepared for it, and that the alternate ending, Silence, and creation process would be detailed in the future. The newsletter also features two behind-the-scenes photos of wayneradiotv in his Spamton attire.

A variety of brief segments are also included here, such as Papyrus questioning where "Junior Jumble" is, and a new character, which is Toby's art of fridge Mettaton, bean Sans, and a miniature of Deltarune's Starwalker. This image was previously shared on the Undertale Twitter as an early teaser for this newsletter.

This newsletter also reaffirms that special events may occur on Undertale's anniversary, which is September 15, 2015.

Collaborations

• Toby Fox reveals that he has done two interview articles for Famitsu, a Japanese gaming magazine. His Famitsu interview columns are titled, "Toby Fox's Secret Base". Toby also shares his cover illustration for a previous Famitsu magazine.
  • Toby's Famitsu interview, featuring Tokimeki Memorial.
  • Toby's Famitsu interview, featuring Secret of Evermore.
• Skies Forever Blue, an original song made in collaboration with Itoki Hana, who was one of the first Japanese fans to send a letter for Undertale. The music video was handled by OMOCAT LLC, the creators of OMORI.
• Summerblue, an original track created for the rhythm game, Beatmania IIDX 30. It is a collaboration with Camellia, and Toby had composed the melody and the chords on the piano.
• Various songs for Pokémon Scarlet and Violet, specifically including "Tera Raid Battles", "Academy Ace Tournament", and "Battle! Zero Lab". The original composition for "Area Zero", rearranged by Gō Ichinose, and the theme melody for "Academy", included in several themes throughout the field.

Merchandise

The Jevil plush from Fangamer was announced. Toby writes it as being the "pluss of Debble from DELTARUN".

Seasonal Comic

A comic depicting Papyrus, announcing a newsletter of his own. This comic features several phrases that rhyme with "New Letter", various monsters misinterpreting, and Sans wearing a green jacket. It ends with Mettaton EX taking over and sitting atop a throne that depicts the Annoying Dog's face. This comic was illustrated by saffronscarf, and the dialogue was written by Toby Fox.

ISSUE 2 - Spring 2023

The Annoying Dog with a balloon strapped around it going from flower to flower.

Sent out on March 31, 2023. This newsletter started with non-Undertale/Deltarune news first.

Deltarune News

The translation process with Keiko Fukuichi for Deltarune's Chapter 3 is about to begin. Toby is intentionally vague to keep it as a surprise for her as she translates the Spring 2023 Newsletter. In the Japanese translation, Keiko expresses surprise and questions if it is real.

Collaborations

• The Greatest Living Show, an original song made in collaboration with Itoki Hana. The music video itself was a commission, and was single-handedly created by BANI-chan for a duration of two years. The Newsletter also warns that the video contains "GRAPHIC CONTENT". Still images are in this newsletter, and merchandise was also featured:
  • The Greatest Living Show Art Book, on Fangamer.
  • The song itself can be purchased on various music platforms.
• Laura Shigihara, the singer for Deltarune's Don't Forget, asked Toby to create an "annoying song" for a character in her RPG Maker game, Rakuen.
• Sans was announced as a playable character in the Japanese rhythm game, Pop'n Music UniLab.

Merchandise

The Ralsei Nendoroid from Fangamer was announced, with the text being "RAAR", with the half text flipped like the preview image. A small preview of the Toriel Nendoroid was also featured here.

Interviews

• A Famitsu interview with KIKIYAMA, creator of Yume Nikki.
• Interview Time with Temmie!: Temmie Chang, artist for Undertale and Deltarune.

Seasonal Comic

Grillby's Rogues Gallery, featuring extra information on the customers of Grillby's and Temmie. This comic was illustrated by saffronscarf.

ISSUE 3 - Summer 2023

The Annoying Dog driving a large steamroller, going to crush a small TV.

Sent out on June 30, 2023. This newsletter reaffirms that Temmie created all the sprites featured in the newsletters. During the collaborations portion, Toby admits that he voiced Queen and Tasque Manager.

An officially recreated cutscene with the unused Sans with ice cream sprite was revealed. It was intended for players who reach the Last Corridor quickly within the time limit. Sans spends two minutes eating ice cream in tune with a special song.

Deltarune News

Creation of the TV World area in Chapter 3 has begun, which features the TV WORLD song Toby composed back in 2016. He compares the final area as being akin to Chapter 1's Card Castle and Chapter 2's Queen's Mansion. Toby admits that he focused more on "unusual gameplay elements" than story for this Chapter. In this section, he states that Chapter 4 will be a more "standard" Chapter.

Collaborations

• A rejected song that was originally for an unspecified rhythm game. Toby describes it as "a factory of dogs getting hit on the head with giant cartoon squeaky hammers". He had created this song as a demo before any instructions were given. Toby explains he was unable to "give it [his] all" if the song does not involve the game's story, character, or scene. However, Toby also states he will try his best to create a different song for the game.
• Toby announces "The Greatest Living Show" has reached one million views. The newsletter shares a free sample from the Art Book.
• Toby Fox's reveals his debut voice acting role, as Jared, from the cartoon We Baby Bears.

Interviews

INTERVIEW: PAPYRUS, features 18 questions from the community, and Sans occasionally commenting in the answers. Toby originally shared the Papyrus questions URL on Twitter on May 30, 2023. Toby's last comment on Twitter is in reference to the Undertale Q&A Tumblr during Undertale's 1st anniversary, where various Tumblr users asked what was Papyrus's favorite food.

Merchandise

The Sans Nendoroid was shared, which are sold on Fangamer. The image is of multiple Sans Nenedroid figurines in boxes, with the caption indicating it is a "DUPLICATION GLITCH (PATCH 1.1.1)".

ISSUE 4 - Autumn 2023

Illustration of Temmie, Annoying Dog, and the protagonist with a cake, and a SAVE Point above them.

Sent out on September 15, 2023. This newsletter celebrates Undertale's 8th Anniversary. Toby admits that he did not have much energy to prepare an event for this anniversary. However, he is appreciative of newsletter readers. Along with this, Undertale was released for Xbox One/Xbox Series X|S versions.

A message from Nelnal, the creator of Sweet Cap'n Cakes and Tasque Manager, was also included. Nelnal describes being a fan of Toby's work, the surprise of receiving a work request from Toby, and upcoming stickers featuring Sweet Cap'n Cakes. Nelnal also states each Darkner's favorite music genre: Sweet enjoys dubstep, K_K favors electro, and Cap'n is fond of hip-hop. Art depicting Sweet Cap'n Cakes with their stickers is featured in this section.

Merchandise

The newsletter has a video advertisement featuring various sleep-centric Undertale and Deltarune merchandise sold on Fangamer, and a brief animation of one of the designs depicting the Undertale cast having a sleepover around Papyrus's bed. 20% from each shirt or blanket goes to charity for AbleGamers. The featured song is an altered version of Deltarune's Dog Check, with the ending replaced with an arrangement of the song, Home.

The video advertisement features the following sleep-themed merchandise:

Undertale:

• Friends and Foes Throw Blanket: A blanket made from cotton-polyester blend, which depicts various Undertale characters and items.
• Toriel Slippers.
• Sleepover: The design featured from the video advertisement. From left to right, it depicts Mettaton, Papyrus, Temmie, the protagonist, Annoying Dog, Sans, Alphys, Undyne, and Napstablook.
• Napstablook Lamp: Resembles Napstablook, and is an LED lamp with a soft silicone cover, powered by three AAA batteries or USB.

Deltarune:

• Lancer Sleep Mask: Resembles the visible eyes Lancer can rarely express.
• Queen Sleep Mask: Resembles Queen's screen when she depicts "LMAO".

Deltarune News

Chapter 3 is now playable from beginning to end. A stealth section was also mentioned. However, it was cut since a mechanic which "basically just makes you move slower" was not deemed fun. Toby also supplied the unused song, sneaking, which was originally apart of this segment.

Collaborations

• Toby Fox x ZUN Collab!?: Toby Fox created a track with ZUN, the creator of Touhou Project, for Touhou Danmaku Kagura: Phantasia Lost, an officially sanctioned fan-game. He also includes an announcement video message, where he explains the story and process for this track, which also includes ZUN's arrangement of Battle Against a True Hero.
• Toby's Touhou Adventure: As a Truck Freak exclusive, Toby Fox shares his experiences meeting with ZUN, the Danmaku Kagura team, behind-the-scenes photos for the live stream, and positive memories of the Touhou series. The Danmaku Kagura staff had invited him to the live stream as thanks, where the above announcement video aired.

Toby also describes meeting two other performers for the live stream. Toby met beatMARIO and his family, and Marasy, a talented pianist, who shared a video of him performing MEGALOVANIA. Toby also mentions wanting ZUN to sign something for Temmie, and how he had ended up signing many iPhones afterwards. A photo of a signing board signed by Toby Fox and ZUN was also shared in this section of the newsletter.

Halloween 2023

The Annoying Dog underneath a blanket looking like a ghost.

Sent out on October 31, 2023. Toby Fox acknowledges October 31, 2018 as Deltarune's anniversary, with this newsletter being released on Deltarune's 5th anniversary. This is the first newsletter to not be considered its own issue.

While Sans's sprites depicts him as being in his usual clothes for Halloween, this is a reference to two of Sans's unused excerpts from the UNDERTALE Alarm Clock, which was featured during Undertale's 2nd anniversary.

Deltarune News

Deltarune's Chapter 3 is complete in terms of dialogue and gameplay. Toby describes that on his birthday, one of his friends visited him and played the entire Chapter. After enjoying seeing his friend laugh at the jokes in game, Toby had asked for feedback. His friend commented that "the bullets seemed kind of hard..." and Toby writes that he "immediately" forgot this feedback.

Toby updates that Deltarune will instead be released once Chapter 4 is complete, rather than the original plan of making Deltarune purchasable once Chapter 3, 4, and Chapter 5 is complete. Toby also informs that he has hired Robert Sephazon as a new producer, who will help speed up game development for future chapters. Additionally, Toby notes that development updates will temporarily be less detailed afterwards, and will only inform when it is near completion, or if something amusing occurs.

Interviews

INTERVIEW: CHAPTER 2 DEVELOPMENT TEAM: An interview with Fred Wood, Jean Canellas, Taxiderby, and Chess, developers behind Deltarune Chapter 2. The depicted art features them as alternate characters from Deltarune, with matching text colors. Fred Wood is represented as a Nubert with glasses, Jean Canellas a purple Swatchling, Taxiderby as a wizard-like Rainy, and Chess as an ICE-E with glasses.

This interview features unused content, art and concept processes, favorite projects during Chapter 2, memories from working with Toby Fox, and glitches.

ISSUE 5 - Winter 2024

Sans driving a bulldozer, pushing countless valentines gifts.

Sent out on February 14, 2024. Valentine's Day cards from the Undertale and Deltarune cast is included with the newsletter, as well as two characters from Deltarune's Chapter 3. Three are randomly featured upon loading Newsletter Archive.

In two other segments, SPAMTON LOVE NETWORK was also shared in the Newsletter, with WayneRadioTV reprising his role as Spamton A. Spamton (renamed to "Spamton V. Spamton"), and Baaulp reprising his voice acting for Spamton B. Spamton. Saffronscarf also told Toby that the Rabbit and Dragon zodiacs are next to each other. As such, she was inspired to draw three pieces of art of the Royal Guards spending time together for the Newsletter.

Valentines 2024

A total of 44 different Valentines was sent out in the email version, with each recipient receiving three random Valentines. The rarity of certain Valentines vary, with some being distinctly rarer than others.

The characters featured in the Valentines are as follows:

Undertale:

• Alphys's Valentines: 3 common. Alphys expresses her appreciation in the first. The second does not include Alphys's sprite, and is described as an "anonymous letter". The third is Alphys telling a Valentines joke.
• Burgerpants's Valentines: 2 rare. Both compliment each other. Burgerpants expresses disliking his job of sending letters for Mettaton, and Valentines Day. In the second card, Burgerpants becomes surprised that the recipient sent him a card.
• Grillby: 1 ultra rare. Grillby is silent.
• Mettaton's Valentines: 1 common. Mettaton sends a letter due to the recipient not sending one. He also supplies a personalized card for the recipient to use.
• Papyrus's Valentines: 3 common. Papyrus references his toolshed, and the other two involve asking for Sans to do something. One of which involves removing a Valentines balloon that a dog keeps getting tangled in. The other is for Sans to get "RED FRILLY CONSTRUCTION PAPER" so that he can accept the recipient's Valentines challenge.
• Sans's Valentines: 3 total. 1 common, 1 rare, 1 super rare. In all three, Sans pranks the recipient.
• Toriel's Valentines: 4 total. 2 common, 2 rare. Three of them are jokes, and one references her Cell Phone call, where she asks the protagonist's flavor preference.
• Undyne's Valentines: 2 common. Undyne lifts a "two ton heart-shaped boulder" at the recipient's door. In the second one, Undyne offers to attack bothersome Valentines.

Deltarune:

• Berdly's Valentines: 2 total. 1 common, 1 rare. Berdly states that to become his Valentine, the recipient must complete the attached IQ test, which has an ELO rating system. The second card is rare and a continuation card, where he states the recipient has failed. However, Berdly asks for their resume in "extracurricular romance" so they can try again.
• Hathy's Valentines: 1 common. "(Shoots you with hearts)"
• Jockington's Valentines: 1 rare. Jockington writes, "Tennis Ball".
• Jevil's Valentine: 1 super rare. Jevil references his bullet attacks.
• Lancer's Valentines: 3 total. 2 common, 1 rare. In one, Lancer compliment's the recipient's car. The second he asks them to take his spades. The rare one depicts Lancer with a mustache, and claims he is taken.
• Lanino and Elnina: 1 extremely rare. The two compliment each other and send the card to show someone else how much they love each other. These two were originally teased as characters for Chapter 3 during the Spamton Sweepstakes, but were both unnamed at the time.
• Noelle's Valentines: 1 common. "Happy Holidays from the Holidays!!!" with Christmas lights surrounding the red hearts border.
• Queen's Valentines: 3 common. In one of them, Queen temporarily unblocks her "Ex" to make them remember how "hot" she is.
• Ralsei's Valentines: 4 total. 2 common, 2 rare. Two cards feature Ralsei being timid towards the recipient. The other two cards are meant for Lancer and Susie, and both have Susie causing mischief at the end.
• Rouxls Kaard's Valentines: 4 total. One is meant for Queen. One is also Rouxls Kaard talking about the other Valentines featured during this Newsletter, and two are puzzle related.
• Spamton's Valentines: 3 common, 1 rare. One includes Spamton claiming he has "leaked military documents" which includes the "LOVE-LETTER-FOR-YOU.TXT.vbs" attachment.

The 39th Valentine is exceedingly rare, and the sender is unknown. This Valentines sender asks if the recipient enjoyed "DELTA RUNE". Additionally, the sender mentions wanting to help someone, but cannot remember who that someone is. However, this Valentines has since been blanked out and only depicts the red hearts and black background.

The Forgotten Man found in Mancountry speaks similar to the unknown author, and also mentions the act of "washing your face". This can indicate that the 39th letter was written by him.

Deltarune News

Deltarune Chapter 3's Japanese localization is being worked on. Most of the Deltarune team not working on localization is now working on Deltarune Chapter 4, with some minor work being done on Chapter 5. Toby shares a .gif of a walking Cuptain at the bottom of this section.

Collaborations

• Toby Fox created some music for Soul of Sovereignty, a visual novel by Gigi D.G. that is meant for a mature audience, which is age eighteen and above. Toby details that he often passed files back and forth with Gigi D.G., and that it felt like enjoyable, and even effort. He also provides a link to Soul of Sovereignty's Soundtrack in the Newsletter.
• U.N. Owen Was Hero?: was revealed as an early gameplay preview. It is the song Toby Fox made in collaboration with ZUN, and was mentioned in the ISSUE 4 - Autumn 2023 Newsletter. He states that Temmie did the cover art for the song. It features Undyne the Undying and ZUN's arrangement of Battle Against a True Hero.
• MEGALOVANIA makes an appearance in "RE_PRAY", a one-man ice show performed by Yuzuru Hanyu.

Merchandise

Toriel Slippers by Fangamer. Toby comments that they are real, which is alluding to the the Toriel slippers appearing in Cucumber Quest.

Interviews

INTERVIEW: GIGI: Toby interviews Gigi D.G., a concept artist behind Undertale and Deltarune.

Spring 2024

Papyrus watering flowers and Flowey.

This Mini Newsletter was sent out on May 16, 2024.

Deltarune News

Production has improved thanks to Robert Sephazon, and a few more people were also hired. Deltarune Chapter 4 is on track to meet its internal development guideline. Remaining content includes:

• A few cutscenes
• Improving the flow of bosses
• 10 overworld maps
• Few remaining gimmick iterations. Toby cites Cyber World's teacup rides as a type of gimmick.

Additionally, Toby states he is still uncertain on the game's release date.

Collaborations

• FALLEN WING, a new song in collaboration with Camellia and Amane Katana from Hololive.

In this section, Toby mentions watching Katana's first Undertale playthrough, and how her voice and Angel aesthetic convinced him to ask if they can collaborate. During the instrumental demo, Toby had considered adding this song to Deltarune if it was rejected.

Toby further details that he can relate with Katana losing her hearing in one ear, as Katana has a dream of being an artist and a musician. Toby writes his personal, positive beliefs in this newsletter that this song is of pursuing hopes and dreams, regardless of loss. Toby also provides Camellia's arrangement as an mp3 file in the Newsletter.

Interviews

INTERVIEW: PAPYRUS (ROUND 2): 9 questions from the community, answered by Papyrus, and occasionally Sans. Flowey and Mad Mew Mew also briefly cameo. It is a continuation from the Papyrus Q&A link Toby shared on Twitter. In this newsletter, he also comments that Papyrus received over 80,000 questions.

ISSUE 6 - Summer 2024

Kris, Susie, Noelle, and Berdly next to a 'campire'.

This newsletter was sent out on July 30, 2024.

Deltarune News

Toby states that Chapter 3 and 4 together are longer than Chapter 1 and 2 combined. Chapter 5's progress has also been steady, with some team members already working on initial drafts for maps, bullet patterns, etc. Toby is confident the release schedule will be smoother for later Chapters.

As of July 23rd, 2024 Chapter 4's development progress includes:

• All maps were finished.
• All battles are playable.
• Two cutscenes need small improvements.
• One battle needs balancing and completed visuals.
• One battle needs a better background.
• Two battles need improved ending sequences.
• Three of Toby's friends have played through the unfinished Chapter 4 in its entirety. In a side note, one of his friends (later revealed to be Brian Lee) kept suggesting the chairs in Ralsei's castle should be named due to "Chairiel" in the Dreemurr residence, though Toby admits this is unlikely.

QUESTS TO RELEASE CHAPTER 3&4!!: A series of "quests" for the release of Chapters 3 & 4 were released, showing what is left before the game's release. Included with this is a rework of the Chapter system, which uses a brand-new function of GameMaker added specially for Deltarune, developed by YoYo Games. An upcoming test version of Deltarune Chapter 1&2 is also announced, acting as a large-scale beta test on Steam and itch.io for this new function.

Collaborations

• DEAD MA'AM'S CHEST, a new song in collaboration with Camellia for Houshou Marine of Hololive. It was suggested to be a "boss song" for her, and MEGALOVANIA was cited as a song reference. Toby details that he and Camellia figured the story concept while writing the song, and lists his creative highlights that are in the video.

ISSUE 7 - Autumn 2024

Papyrus holding Sans to form the shape of a 9.

This newsletter was sent out on September 14, 2024. Undertale's 9th anniversary is celebrated. This is the first newsletter to utilize the recipient's written name and favorite food in an email. However, this issue is slightly modified for the Newsletter Archive, such as listing "Reader" instead.

Deltarune News

Toby provides a brief review, including a link to the Summer 2024 Newsletter as part of the recap. Toby and states that the team is waiting for the GameMaker team to assist with some issues, and will update fans on the official UNDERTALE Twitter.

During the time span, per Chapter progress includes:

• Chapter 3: Main content was completed. 8-4, the Japanese localization company, is working on ensuring all lines display correctly in-game. An image of Kris and Susie on a bridge in couch cliffs is featured here.
• Chapter 4: The PC version is officially complete, excluding bug testing and the Japanese localization. A screenshot of Noelle in her house is featured here.
• Chapter 5: All team members not working on localization, porting, or fixes are now working on Chapter 5. An animated blue balloon sprite is featured here.

In the "OVERALL" section, "delicious food" replaces the recipient's listed favorite food in the Newsletter Archive. An animation of a Cuptain climbing a Dark Sanctuary wall is featured at the end.

• CONCEPT ART & UNUSED MUSIC!: Toby shares Chapter 2's Concept Art and Unused Music. This is due to Toby considering Undertale's anniversary a day to also celebrate Deltarune.

Merchandise

For the 9th anniversary, UNDERTALE Kitchen Collection was announced, which is a 6 item set. The newsletter features an Undertale themed advertisement video for the set, with the song Home playing. This set also is featured as pictures in the newsletter, with Toby having various comments:

• Annoying Dog Mug: Toby requested this. He mentions having a cup somewhat similar to this when he was younger. Toby suggests filling it with hot chocolate, or a chocolate cake to "excavate" the dog.
• Papyrus Date Commemorative Spaghetti Plate: Purchasers of this plate can pretend to be at the "Papyrus Collaboration Café" with this.
• Glass You Might Drink Out Of When You Fight Sans: Toby states that his eye is transparent. Due to this, Sans will turn "into an AU version of Sans" if a different colored liquid is used. The title is a reference to the unused song, Song That Might Play When You Fight Sans.
• Toriel's Kitchen Oven Mitt & Potholder Set: One of Toby's suggestions. He admits her snout is a bit flat, but no fluff could be added due to the risk of being flammable.
• Toriel's Kitchen Pie Dish: This is stated to be perfect for a Butterscotch Pie. The email version of this Newsletter has this describing as the recipient's "favorite food Pie".
• Toriel's Kitchen Apron: Toby jokingly assumes the Reader comments that the Delta Rune looks similar to the "Trif*rce". Which is the Triforce from The Legend of Zelda. This text is exclusive to the Normal tier subscription, but is the default for the Newsletter Archive.

There is also a preview of Sans and Papyrus's heads as salt and pepper shakers, which was suggested by Everdraed.

Interviews

INTERVIEW: What do you think about the number nine?: An interview with Sans about his thoughts on the number nine. The question itself is answered in the first textbox, with the rest being banter between Toriel, Papyrus, Sans, Undyne, and Alphys.

Letter

A letter was included by Toby the end of the newsletter. It is implied to be from Asriel about the fallen human, and 9 being their favorite number.

My best friend's favorite number is nine.
It's because
there isn't a number that's higher.
9. 99. 999. 9999.
If everything gets high enough,
You become invincible.
Nothing can hurt you anymore.
Nothing can hurt anyone anymore.
But isn't it scary, to think there's a highest number?
That, if you made 99 good memories,
you couldn't hold anymore.
So I don't like to keep count
of the flowers we pick, or the times that they laugh,
or how many scary faces they make.
I just hope
we'll be friends
for 999 more years.

ISSUE 8 - Holiday 2024

The Annoying Dog frozen in an ice crystal sticking out of the snow.

This newsletter was sent out on December 18, 2024. Unlike other newsletters, the background of this newsletter is entirely white.

This newsletter features the announcement of Toby Fox's official Bluesky account. He details about posting on Bluesky, including teaser posts about "chicken, which actually resembles an image of a dog climbing", which alludes to the climbing segment in Chapter 4's 3rd Sanctuary. There is also a song about carpet, where the lyrics are from the Persona: Trinity Soul track Burning Men's Soul , and Jackenstein's theme, A DARK ZONE. Additionally, Toby has archived various "Roast Chicken" Bluesky posts on his Fangamer page.

Deltarune News

Toby is certain that Chapter 3 and 4 will release in 2025.

• LTS TESTING: GameMaker was updated for its new chapter-switching command. However, Toby mentions that there are unforeseen issues due to this. This can range from new crashes, and previously patched bugs. The developing team has done their best to fix this, though they are unsure if all errors were resolved. Toby states that GameMaker will have to be updated again after Chapter 3 and 4's release, which may repeat these errors.

The LTS testing was initially shared on the official Undertale Twitter and Toby Fox's Bluesky on November 25, 2024. It was fully patched on December 9, 2024.

• PROGRESS UPDATE: Features the Annoying Dog in a block of ice, similar to what can occur to Berdly in the Chapter 2's Weird Route. Chapter 4 and 5 feature holiday decorations.
  • Chapter 3: Professional testing for Chapter 3 was done on PC. He shares a review segment. The tester enjoys finding the small details. There is criticism for the lack of SAVE points during longer sections, however, these were also mentioned as enjoyable. Toby confirms this is true for one portion, though it is also "rumored to be fun..." Chapter 3's excerpt is a bug report about a potential typo in the Japanese version, which was intentional and resembles writing for ICE-E's P"E"ZZA. The featured image is Susie sleeping in her Dark World attire, similar to her teased pose from /blink/, one of Spamton Sweepstakes's prize links.
  • Chapter 4: Japanese translation went through its first pass. Here, the newsletter features English and Japanese dialogue screenshots, including Berdly asking someone (seemingly Kris) to go to the festival with him. Toby states PC testing will begin, then console testing afterwards.
  • Chapter 5: While some team members focused on bugfixes for Chapter 1, 2, and 3, Chapter 5's progress is steady thanks to the recently hired people. No further information was revealed.

Collaborations

• "Theatore Creatore", a new song in collaboration with Camellia for Sega's rhythm game, Chunithm. This song is for a theatermaster, who is actually a "God of Chaos" in the game. Toby states that he created some of the melodies, and Camellia did "all of the hard work". The reference song Sega sent to Toby as an example was Deltarune's THE WORLD REVOLVING.

Merchandise

A new merchandise set by Fangamer for both Undertale and Deltarune.

In particular, Toby focuses on these two in the newsletter:

• Important Person's Shirt: Toby describes this as making the purchaser "look more like someone with an important connection" to them. This is the first merchandise to be featured in both Undertale and Deltarune on Fangamer.
• Seam Plush, from Deltarune. Toby was informed that many people wanted a plush of Seam. He included a staff as part of their plush design. Additionally, Toby acknowledges that the plush does not have a tail.

The image in the newsletter features the following merchandise, which are all Undertale themed, from top left, then right:

• Undyne's House Hinged Pin: A pin of Undyne's house. When opened, it depicts Undyne cooking with the protagonist.
• Papyrus & Sans's House Hinged Pin: A pin of Papyrus and Sans's house. When opened, it depicts the interior, and Sans and Papyrus.
• Grillby's Hinged Pin: Depicts the Grillby's, with the restaurant regulars when opened.
• MTT Brand Robe: A black and pink plush microfleece robe, featuring an embroidered, winged Mettaton on the back.
• UNDERTALE Vinyl Record Coaster Set: Miniature coaster variants of the UNDERTALE Complete Vinyl Soundtrack Box Set.
• Underground Garden Button-Up Shirt: A patterned shirt depicting various Undertale characters, and plants and trees, such as the golden flowers, and Echo Flowers.
• Underground Garden Pouch: Similar design as the above shirt, but on a pouch and with the art more compact.

Snow

A snowman that leads to a letter made by Noelle.

This /snowman/ URL can be found by clicking the snowman sprite at the bottom of the newsletter. It appears to be a letter from a young Noelle, where she reminisces about making snow angels with everyone, including Kris and her sister. She would always have the biggest wings during these snow angel contests. This note also includes a quote from her sister, Dess.

When it snows,
Me and my sister and everyone have a contest
To make the biggest snow angel of all.
We lie on the ground and spread out our arms
And wave them until we get a shape just like us.
I'm the smallest
Even smaller than Kris
But I don’t lose.
Because, after we stand up to look
Dess always tells me,
"Hey, look, Elly! Yours has more hidden underneath!"
And pushes away all the snow I couldn't reach
So I have the biggest wings of all.

I wish it could snow

whenever I wanted.

DELTARUNE CHAPTERS 1-4 RELEASE DATE ANNOUNCEMENT

Illustration of the DELTARUNE cast chomping on Steam logos

Sent out on April 2, 2025.

Deltarune Chapters 1 through 4 are officially announced to release on June 5th, 2025. It will be purchasable for $24.99 on the PC, Mac, Nintendo Switch, Nintendo Switch 2, PlayStation 4, PlayStation 5.

The DELTARUNE Nintendo Switch 2 Announce Trailer was also included in the newsletter. It features small gameplay previews of each Chapter, and has a polished arrangement of Deltarune's unused song, Game Main Theme (Piano Sketch), by Camellia.

Toby states that Deltarune only has to be bought once, and that future chapters will be added as free updates. The Soundtrack for Chapter 3 and 4 will cost $14.99 on Steam, and contains over 150 songs. The OST of future Chapters will be added to the Soundtrack for free upon their release. Additionally, Toby states that Chapter 3 and 4's Soundtrack will also be available on his bandcamp page. Toby also suggests readers to wishlist Deltarune on Steam.

Due to Deltarune being a launch title for the Switch 2, a special, unique room was created: Mike minigames. This room will be available for all versions minus control scheme. The content amount, dialogue, setting, music etc. will not have any meaningful differences. Toby also states that everyone gets Pluey for free.

The following information on console differences was also revealed:

• Nintendo Switch:
  • Can import SAVE files from the Chapter 1 and 2 Deltarune Demo.
• Nintendo Switch 2:
  • For the special room, it takes advantage of its ability to use mouse controls on two controllers at once.
  • It can import the Chapter 1 and 2 Demo and full game version of Deltarune's SAVE files from the Nintendo Switch version.
• PS4 and PS5:
  • Are mandated to have trophies, giving rise to a hard-core challenge. Toby Fox makes no endorsement for players to attempt this.
  • Can import SAVE files from the Chapter 1 and 2 Deltarune Demo.

DELTARUNE CHAPTERS 1-4 RELEASE TIME ANNOUNCEMENT

Picture of a dog opening an empty wallet with Spamton in it.

Sent out on May 8th, 2025.

Deltarune Chapters 1 through 4 are revealed to be released at Midnight on June 5th in local time for Switch 2, the day of the console's release, and Midnight JST, on all other platforms, meaning June 4th in most time zones.

It was also revealed that the PlayStation and Switch versions of the game will release in a cross-buy bundle, meaning PlayStation users receive both the PS4 and PS5 versions with one purchase, and the same for Switch and Switch 2 players.

Additionally, a picture depicting PlayStation trophies is in the newsletter, with it noted that some conditions can cause them to be missed.

Spamton Sweepstakes

Silence, the alternate ending for the Spamton Sweepstakes has been released. Toby suggests taking a look at the rest of the website. He also states that he only considers in-game as "canon", and that there is "nothing critically important" on the site. This is alluding to the fourteen Silence links, which was added along with the /silence/ page.

Social Media

To build up towards Deltarune, Toby states he will be posting more on his Bluesky and Twitter accounts, and that the team will be posting more on the official Undertale Bluesky and Twitter accounts.

DELTARUNE CHAPTERS 3+4 RELEASE NEWSLETTER

Susie, Kris and Ralsei during the Rock Video, artwork by Temmie Chang.

Added on Toby's Fangamer Newsletter page on June 3, 2025.

It is the first Newsletter to not initially be sent as an email, as the email version was sent the next day. It was first shared on Toby Fox's Twitter and the official UNDERTALE/DELTARUNE Bluesky accounts.

In this short Newsletter, it has suggestions to avoid spoilers for Deltarune's Chapter 3 and 4. This includes avoiding social media and video websites. Toby also suggests that social media posters should try to be mindful of followers who do not want to be spoiled.

At the end is a thank you post from Toby Fox. He expresses his gratitude, and that he will continue to make the game as he enjoys sharing it, and wishes that the readers will have a good time.

Deltarune News

Toby reminds that Chapter 3 and 4's soundtrack will be available on his Bandcamp and on Steam. He still recommends purchasing the soundtrack on Steam, as he considers it a good deal. Toby also warns that the track names are spoilers, and suggests that it should be read after completing Deltarune.

Toby acknowledges that bugs may occur, and asks readers to email if any errors occur. He states that the deltarune.com's FAQ page will be periodically updated in the upcoming weeks to list known issues.

In a later section, Toby admits that a last-minute change occurred, and specified that the Nintendo versions of Deltarune may be slightly delayed on receiving patches. This includes a "Buble" speech bubble that could appear in Chapter 4, which was listed on the official FAQ page until July 8, 2025.

UNDERTALE DELTARUNE NEWSLETTER FALL 2025

For other unmentioned 10th Anniversary events, see UNDERTALE 10th Anniversary events.

The protagonist and Papyrus celebrating, saying '10!' and '10?' respectively.

Added on Toby's Fangamer Newsletter page on September 14, 2025.

It is the second newsletter not initially sent as an email, and was vaguely mentioned via Toby's social media. The email version was sent out on September 15, 2025.

In this Newsletter, Toby informs that the Undertale's 10th Anniversary will be celebrated as a two-day stream event, which he describes as being similar to the stream for Deltarune's Chapter 1. It begins on a weekend at 4PM from September 20-21, and can be watched on the official Undertale website. He comments that the practice runthrough took 8 hours to play through.

Deltarune News

Toby acknowledges Chapter 3 and 4's release, but he does not have time to discuss his thoughts in the Newsletter.

Thus, Chapter 5's progress is the focus. Toby admits he has little to share, though in the Newsletter, he spoils an optional Castle Town cutscene featuring the Mikes.

Chapter 5's development progress includes:

• Early areas are complete, but needs polish.
• Most cutscenes are in a "first draft state".
• Most enemies are done. One programmer is already working on "regular enemy bullet patterns" for Chapter 6.
• Many boss attacks are finished.

Toby also provided a timeline for Chapter 5, though it is currently in the "MAKING GAME" phase. He also admits that the game is not likely to be released on the first half of 2026.

Collaborations

• TOBY FOX VOICE ACTING FOR HOMESTUCK!?: Toby details his past with Homestuck, the webcomic.

Toby explains he originally had "no aspirations for music composing" until he discovered it and wanted to become part of the music team. When he was accepted, he made many songs for Homestuck, and used many motifs. The webcomic's fame lead to him gaining a following on social media, which benefitted the Undertale Kickstarter. Toby also admits that he initially reached out to Temmie due to one of her Homestuck fanart pieces on Tumblr.

Toby further details when he was approached on helping with the Homestuck animation, he felt obligated to assist, even if it was for voice acting. He also mentions in the studio, he met Richard Steven Horvitz, the voice director, who is known for voicing characters such as Invader Zim. At the end is a link to the Homestuck animated pilot.

• OFF MUSIC!: Toby explains that Fangamer developed an alternate version of the OFF game for the Nintendo Switch and Steam, and that the game was inspirations for the designs of Sans and Papyrus.

While ACC, the original musician did not want his music in the remake, Mortis Ghost asked Toby to make music for it instead. In the Newsletter, Toby shares a download link of all the he composed for the game as a .zip file, and shares the YouTube playlist.

Merchandise

Toby reveals two new albums:

• DELTARUNE Piano Collections Volume 1: Deltarune piano arrangements by Trevor Alan Gomes. Toby also mentions that the YouTube provides free samples.
• Monstercat x Undertale: Electronic Undertale arrangements by various artists. Toby states the full album releases on Monday, October 6.

On Fangamer: The screenshot and URL featured is Tenna, from Deltarune. The following merchandise is shown:

• Mr. Tenna Plush.
• Mr. Tenna Figurine.
• DELTARUNE Character Pin Set 4, which features: no hat Ralsei, Tenna, Lanino and Elnina, and Shadowguy.
• What's the Data, Theta?, an ENA T-shirt that Toby states had originally appeared in the "Tenna" search results on Fangamer.

In the Japanese version of the newsletter, this entire section is different, as two of these products are not available on the Japanese version of Fangamer, and inputting "Tenna" or "テナ" into the search engine only produces a result for the Mr. Tenna Figurine. Instead, the screenshot is replaced with a stretched-out image of the Mr. Tenna Figurine, with a caption reading "マイクくん！ワタシを買って！だれか買って！？", roughly translating to "Mike! Buy me! Won't somebody buy me!?"

UNDERTALE/DELTARUNE NEWSLETTER WINTER 2025

Tenna holding a gift.

Added on Toby's Fangamer page on December 18, 2025.

Toby takes advantage of this newsletter to share a new development status for Deltarune Chapter 5.

It also contains a second scene from the optional Castle Town cutscene featuring the Mikes, following on from the one shared in the previous newsletter if Tenna was recruited, as well as the new shop music played for most merchants, Toby stating that "this is the only song that doesn't spoil something".

Towards the end of the newsletter, Toby mentions that Deltarune is getting its first sale, with 20% off during the Steam Winter Sale, and will also be discounted on consoles in the coming days. That said, he assumes that "all of the people reading the newsletter already bought the game".

Deltarune News

Toby reports that development of Chapter 5 is progressing very well and that the Japanese localization process has begun. He also states that the console porting process should begin in January 2026, maintains that the game will be released within months of this newsletter being sent out, and that much of the development team will already be focused working on Chapter 6 upon the release of Chapter 5.

Chapter 5's development progress includes:

• All rooms are done, but the backgrounds of some of them needs polish.
• All cutscenes are done, but less than 10 of them needs visual polish.
• Most of the battles are done, but the unfinished ones still need tweaking in terms of pacing and bullet patterns.

Collaborations

SQUARE ENIX COLLAB, a music and merchandising collaboration, previously announced on November 21, 2025 on Square Enix's Twitter and Bluesky accounts. Toby mentions it in the newsletter, explaining that it currently consists of music albums and T-shirts, and that Temmie Chang contributed to some of the designs. He then presents the Sans and Chocobo Tee and Annoying Dog and Emil Tee, as well as the piano arrangement album Echoes Beneath, produced by Yoko Shimomura, who also helped arranging MEGALOVANIA.

Interviews

CHAPTER 3 and 4 LOOK BACK!, in which Toby presents various sketches and development material for Deltarune Chapters 3 and 4, as well as some of its developers.

Creation and development

The concept art for sprites is often created by Toby. Movement programming for sprites in the Newsletters was done by Fred Wood.

Gallery

• 
  Toby Fox in swim trunks covered in a large amount of foam.

External links

• Toby Fox's Fangamer page
• Toby Fox's Fangamer Comics page
• Toby Fox's Fangamer Interviews page
• Toby Fox's Fangamer Updates page
• Japanese Undertale/Deltarune Newsletter, via Toby Fox's Fangamer page.
• luiz-zeroxis - Undertale/Deltarune Newsletter/Mailing list Archive