Deltarune Official

No Deltarune article is complete without addressing the iceberg of lore hiding beneath the cute surface.

The Knight: The main antagonist who creates the Dark Fountains. Who is the Knight? Is it the mysterious figure seen at the end of Chapter 2? Is it a new character? The most popular (and terrifying) theory is that it is Kris themselves. When they rip out the soul at night, are they going to create the next Fountain?

The Roaring: The apocalypse. If too many Fountains are opened, the balance breaks. The Titan's rise. The sky turns to "Roaring." Darkners turn into mindless beasts. Ralsei is terrified of this, which makes his suspicious eagerness to keep the party small and contained feel less like kindness and more like control.

Wing Gaster (The Royal Scientist): Undertale's forgotten character is everywhere in Deltarune. The "Goner Maker" intro? That’s likely Gaster speaking in his iconic cryptic typeface (Entry 17). The sound effects for the save points? Gaster’s theme. The general consensus is that Deltarune is a "world" Gaster created after falling into his CORE in Undertale. We are playtesters in a broken simulation.

Toby Fox releases annual "progress updates" via newsletters. The current known roadmap:

| Chapter | Status | Notes | |-------------|------------|------------| | Chapter 1 | Released (2018) | Free demo/prologue. | | Chapter 2 | Released (2021) | Free; doubled the length of Ch.1. | | Chapter 3 | Completed (as of 2024) | Fully playable, localized, awaiting polish. | | Chapter 4 | In development | Coding and art in progress. | | Chapter 5 | In early dev | Some music and writing done. | | Chapters 6-7 | Planned | Will conclude the story. |

Note: The full game (Chapters 3-5) will be a paid release. No official release date has been set.

As of 2024/2025, Toby Fox is actively developing the next chapters. In his newsletters, he has confirmed:

Based on the Chapter 2 ending, Chapter 3 likely takes place inside Toriel’s living room. After Kris creates a Fountain at the end of Chapter 2, we see Toriel sleeping on the couch. Expect the TV, the cooking utensils, and the dust bunnies to come to life as enemies. And perhaps... we will finally meet the Knight.

In an era of massive open worlds and live-service grind fests, Deltarune is a pocket-sized existential crisis. It asks a question that Undertale avoided: What if you don't have free will?

It is a game where the "Mercy" button exists, but it feels desperate. It is a game where you want to be friends with everyone, but you can feel the strings of the puppeteer (Toby Fox) pulling your arms. It is hilarious, with jokes about internet trolls and anime conventions; but it is also horrifying, with themes of loneliness, loss of agency, and consent.

Deltarune is not finished, but it is already a masterpiece of tone. Whether you are here for the banger soundtrack ("BIG SHOT" will live in your head rent-free), the shipping wars (Kris/Susie? Noelle/Berdly?), or the Gaster conspiracy theories, one thing is certain:

Your choices don't matter. But the journey? The journey is terrifyingly beautiful.

You are not in control. Kris is.

Are you ready for the next chapter? In the meantime, go hug a Ralsei plushie. You’ll need the emotional support.

, the secret boss of Chapter 1, you must collect three broken key pieces and take them to at the Bake Sale to be fixed. Broken Key A

in their shop after first speaking to Jevil through his cell door in the Card Castle. Broken Key B : Found in a chest in the

. Locate the area with the spinning "Scissor Dancers" and follow a hidden dark path in the southwest corner to find the chest. Broken Key C : Located behind a suit-symbol puzzle in the area, just before the Great Board. : Input the symbols in the order of the Card Castle floors: Diamond, Heart, Club, Spade Chapter 4: The Golden Piano Notes

In Chapter 4, the "pieces" are three sets of musical notes used to unlock a secret boss via the Golden Piano found in the Study.

: Located near the spinning shadow creatures; requires climbing tools to reach a mini-boss. Second Set

: Found through a stained-glass corridor and a maze containing a glowing figure. : Hidden behind a waterfall in the Wishing Room ; involves navigating a maze with a bell-covered wall. Other Notable "Pieces" Broken Cake in the Field to get a piece of Broken Cake. can fix this into a , which can later be traded back for infinite Chess Theory

: A popular community theory suggests that the bosses of each chapter represent different chess pieces (e.g., King, Queen, Bishop, Knight, Rook, Pawn). Steam Community puzzle solutions for the Chapter 4 notes or details on how to defeat Deltarune Chapter 4 Secret Boss Guide

is an episodic role-playing game developed by Toby Fox, the creator of

. While it features many familiar elements, it is set in a parallel universe rather than acting as a direct sequel or prequel. Core Premise and Story The game follows

, a human teenager in a town of monsters, who falls into a mysterious "Dark World" during a school project. The Heroes : Kris is joined by , a school bully turned reluctant ally, and , a soft-spoken "Prince from the Dark". The Mission

: Together, they form a prophesied trio of heroes destined to seal "Dark Fountains" to prevent an apocalyptic event known as "The Roaring". Narrative Themes : The story explores complex themes of agency and control

, specifically the unsettling relationship between the player and Kris, who often appears to resist the player's commands. Gameplay Mechanics Deltarune

Deltarune evolves the turn-based combat of its predecessor with several key additions: The Party System : Unlike the solo journey of

, players manage a three-person party with unique tactical synergies. ACTing and Sparing

: Players can choose to fight or use the "ACT" command to resolve conflicts peacefully. In

, teammates can now assist in ACTing to spare enemies more efficiently. Graze System

: Moving your soul close to enemy bullets without touching them builds a "TP" (Tension Points) meter, which is used to cast spells or perform special actions. Release Structure As of 2026, the game is being released in chapters:

Developing a post about Deltarune can take several directions depending on your audience. Below are three ready-to-use templates based on current game status and common fan interests. Option 1: The "Hype" Post (Updates & Release)

Use this for a general update on the game’s progress, focusing on the latest news from the official UNDERTALE/DELTARUNE Newsletter.

Caption: 🕯️ The Knight is still out there... and Chapter 3 & 4 are closer than ever! Key Points:

Toby Fox confirmed that Chapters 3 and 4 will release together as a paid title in 2025.

Chapter 5 is currently in active development, with recent updates mentioning localization has already begun for earlier chapters.

New mechanics like the "game_change" command are being implemented to make switching between chapters seamless on consoles.

Call to Action (CTA): Which Dark World are you most excited to explore next? 👇 Option 2: The "Theory" Post (Deep Lore)

Perfect for engaging the hardcore community on platforms like r/Deltarune. No Deltarune article is complete without addressing the

Caption: 🎭 "Don't forget, I'm with you in the dark." But who is actually in control? Key Points:

The Vessel: What happened to the Goner we created at the start of Chapter 1?.

The Red Soul: Are we the hero, or just a parasite controlling Kris?.

The Shadow Crystals: Speculate on what the final reward will be for collecting every crystal from bosses like Jevil and Spamton.

CTA: Is Kris really the one opening the fountains? Share your wildest theories! 👁️ Option 3: The "Art/Creative" Post

Best for showcasing fan art, music covers, or gameplay clips.

At first glance, Deltarune looks like Undertale. You explore a top-down world, solve puzzles, and enter turn-based fights where you control a heart (the SOUL) to dodge incoming attacks. However, the core difference is the party system.

You do not control just one character; you control Kris, Susie, and Ralsei (and later, others) as a unit. This changes everything:

Crucially, you cannot "grind" for EXP in the traditional sense. Defeating enemies gives you EXP (Experience Points) but also Wins. The game tracks your violence level, and early hints suggest this has narrative consequences—though far different from Undertale’s "Genocide" route.

Unlike Undertale's focus on "kill or spare," Deltarune posits that your choices do not matter in the traditional sense. The narrative consistently steers key events to a fixed conclusion, but it explores the importance of how you travel through that fixed path. A mysterious voice (implied to be the player) controls Kris, who occasionally breaks the fourth wall by tearing out their own soul (the red heart) at the end of chapters.

While Deltarune is not a direct sequel, it uses parallel-universe versions of beloved Undertale characters.

These callbacks serve as emotional shorthand, but the characters have different histories and relationships. Toby Fox has warned fans not to assume they know what will happen next based on Undertale.