Planned Release Date: Q4 2025

About This Game

Story

A young nobleman, isolated within the infamous Cursed Manor, is found burned to death.
Was it the work of a demon’s curse, the result of human malice, or merely an accident?
Uncover the darkness that haunts the manor.

About the Game

"Murder of the Soot Demon" is a 3D murder mystery game for four players only.
Each player becomes a suspect in a brutal immolation case. Through reliving fragmented memories, exploring the manor, and debating with other players, you must uncover the killer hiding among you.

Whether you can conceal your own secrets—or expose those of others—will shape the fate of your character.

Step into the role of a protagonist in a mystery novel, and experience a one-time-only narrative like never before.

• Approximate playtime: 240 minutes

• In-game voice chat is supported

• Due to the nature of the game, you cannot play it multiple times—once you know the truth, the mystery is lost.

• To preserve the experience, please avoid spoilers, including watching or sharing playthroughs on social media or video platforms.

A Deeper, More Immersive 3D Deduction Experience

Experience the full depth of the murder mystery genre in immersive 3D.
We’ve reimagined the classic mystery format to deliver clearer logic, more intense psychological mind games, and a richer investigation experience.

The Same Friends—A Whole New Kind of Suspense

If you usually enjoy online multiplayer games with friends, this title offers a completely different kind of thrill.
All players become suspects in a murder case—deceiving each other to protect their secrets, investigating together, and shaping a one-time-only story.
In doing so, you might discover unexpected sides of your friends—and perhaps even deepen your bonds.

Characters

0. Nicolas Alvier – The Young Man
A noble youth cursed with the “Curse of Soot” one year ago.
He has since lived in a remote manor. His hobby is playing string instruments.
He was found burned to death on the night of his birthday.

1. Léa Alvier – The Young Girl
The eldest daughter of the Alvier family and younger sister of Nicolas.
She followed him when he was sent away to the remote manor. Her hobby is painting.

2. Nathalie Fournier – The Maid
The only maid working in the manor.
Highly competent and proud of her work. Her hobbies are unknown.

3. Daniel Bernard – The Priest
A priest with deep knowledge of demons.
He came to the manor to lift the young man’s curse. His hobby is drinking.

4. Joël Alvier – The Patriarch
The head of the Alvier family, always wearing a mask.
He visited the manor to celebrate Nicolas’s birthday. His hobby is watching theater.

How the Game Unfolds

0. Tutorial
Even first-time players of murder mystery games can jump right in.
A clear and carefully designed tutorial will guide you step by step.

1. Memory of the Crime
Relive the day of the incident from each suspect’s perspective.
The events are fully recreated in 3D, making even the smallest details easy to grasp.

2. Investigation
Split into pairs and explore the manor to gather evidence.
Found something that could incriminate you? Better hide it before someone else finds it.

3. Discussion
Share what you’ve discovered and unravel the mystery together.
The game features a unique system that makes viewing and sharing information effortless and intuitive.

4. Voting
Based on everything you've learned, vote for who you think the killer is.
This is the turning point that determines everyone's fate.

5. Ending
The ending changes depending on the outcome of the vote.
Did you manage to protect your secret? Was the killer revealed?
All players perform and witness the final chapter together.

6. Truth Revealed
A full breakdown of the case is provided with guidance from an NPC narrator.

7. Post-Game Discussion
The game’s not over until you talk it out.
Share your thoughts, reactions, and theories to complete the experience.

Pioneering the “Ultimate Protagonist Experience” — from VRTRPG to 3D Murder Mysteries

Gudaguda Buton

Founded in 2020 as a VR Tabletop RPG (VRTRPG) circle, Gudaguda Buton has been at the forefront of developing multiplayer, roleplay-driven digital games.
Guided by our motto, “the ultimate protagonist experience,” we’ve continued to explore and innovate new frontiers in immersive storytelling—such as VRTRPGs and 3D murder mysteries.

Creator’s Comment

Novels, manga, anime, films, video games...
We’ve enjoyed stories in many forms.

As children, we loved those tales where the protagonist escapes danger through quick thinking, and pushes forward with unwavering determination.
But deep down, haven’t we all wished we could be the protagonist ourselves?

"Murder of the Demon of Soot" is a stage built to fulfill that dream.
In this story, each of you is both a protagonist and an audience member.
Use your wit, carve your path, and move the story forward—just like a true hero.

"Murder of the Demon of Soot" Streaming and Video Guidelines

Murder of the Demon of Soot is a 3D murder mystery designed to offer a carefully crafted, one-time-only narrative experience.
Due to the game’s high sensitivity to spoilers, we kindly ask for your cooperation in protecting the integrity of the story.

To ensure that this title and the genre itself can grow alongside the culture of content creation, we have established the following guidelines:

• Live streaming of gameplay is not allowed.
  However, recorded video uploads are permitted.
  Note: Watch parties are allowed only if the host has already played the game.

• The end credits must be shown in the video.
  If your playthrough is split into multiple videos, showing the credits in just one of them is sufficient.

Please refer to the full version of our content guidelines, which will be updated and published at the time of the game’s release.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

The watercolor paintings that appear in the game, depicting the situation at the crime scene, use AI for editing.

Mature Content Description

The developers describe the content like this:

This Game may contain content not appropriate for all ages, or may not be appropriate for viewing at work: General Mature Content