"Reveal all, deceive all." Hornet the Vanguard, a mystery-solving adventure game. Solve mysteries and gather information in the exploration part, and uncover the truth in the deduction part! …The key to the case is always with buddy.
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Planned Release Date: 2024

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About This Game


Dainichikoukoku, a country much like Japan in the early 1900s.
At a time when the sound of military boots could be heard, the army established the secret intelligence department "Theatres".
Among the personnel gathered to serve as spies, the protagonist, Hachiya, is among them.

In front of the corpse of the man who was supposed to be his superior - with a face as gloomy as ever and an unmoving prosthetic hand.
"Now, let's get to work."

This is a story of many "lies" spun by the protagonist, who chose to fight for his one and only wish, and the people who will eventually become his friends.

Hornet the Vanguard is an adventure game in which the story progresses through exploration and puzzle solving.
Each case to be solved is completed in one chapter.
This title contains chapters 0 through 2; chapters 3 and beyond will be released sequentially.


Chapter 1
On a mission, Hachiya infiltrated the Koutoza, the best theater in Japan.
There, however, an actress is murdered.
The mysterious detective Yuzaki suspects Hachiya as the murderer. ......

"I like you a little bit. Would you like to be my subordinate person?"
Hachiya is assigned to investigate the case with him and ......?

Chapter 2
Residents of a poor neighborhood are being attacked and mysteriously dying by a yokai.
Hachiya is ordered to investigate such a dubious case.
He picks up a dying man, Kugami, and goes undercover at a mysterious temple.

"You'll probably get into trouble if you stay here."
Is it a curse or faith?
What is the truth as they see it?


Story part
There are two endings for each chapter.
Investigate various cases under the orders of Theatres.

Search Part
When an incident occurs, investigate the scene and gather evidence and information.
Sometimes you may have to use items to unlock a lock or solve a mystery...

Deduction part
Once you have gathered information, it's time for the deduction part.
You must confront the key witness with the appropriate evidence and elicit a response.


Hisaaki Hachiya
"I am always the only one who can save myself."
She lost her right arm in an incident and now wears a prosthetic arm that does not work.
She is quick-witted, but her reckless behavior is remarkable, even at the cost of his own injuries.
She name and career are both fictitious, and only a few people know his true identity.

Eiichiro Yuzaki
Voice: Koutaro Nishiyama
"You're a bad boy. You need a spanking, don't you?"
A man who calls himself a detective.
At first glance, he appears to be a young man with elegant manners and a soft tone of voice,
But in reality, he is an ambitious man with a black heart. He smiles and spits sarcasm.
He likes Hachiya, who is similar to him, but uses him for his own purposes.

Ilya Kugami
Voice:Haruki Ishiya
"I ain't gonna get collared by nobody."
A key witness in the Inugami case.
He is a wounded, always hungry, stray dog-like man who does not trust others.
He is a fiery fighter, and is quick to settle disputes with violence.
Hachiya sold him a favor of a night's lodging and a night's meal. He has a big secret that he can't tell anyone.

Sougo Utagawa
"Welcome to Theatres. You're not going to back out now."
Theatres' chief strategist.
He is always on the lookout for a good plan,
He is often underestimated because of his smirking face and teasing mannerisms.
He is the man who picked up the main character and raised him as "Hachiya," but he appears as a corpse at the beginning of the story.

Live game streaming Guidelines

This work permits the distribution of play videos.
You can distribute from the beginning to the end of the story.
When distributing, please include a warning in the title of the video, such as "Spoiler alert".

System Requirements

    • OS: Windows10
    • Processor: intel core i5
    • Memory: 4 GB RAM
    • Graphics: Intel® HD Graphics 620
    • Storage: 2 GB available space
    • Sound Card: 不要
    • VR Support: なし
    • OS: macOS13.3.1
    • Processor: intel core i5
    • Memory: 4 GB RAM
    • Graphics: Intel Irs Plus Graphics 1536
    • Storage: 2 GB available space
    • Sound Card: 不要
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
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