The nightmare returns... Explore a dark and creepy mansion crawling with terrifying monsters, find keys, and use weapons to fight back as you try to find your way out!
All Reviews:
Positive (17) - 94% of the 17 user reviews for this game are positive.
Release Date:
Dec 14, 2023

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“This game is still incomplete, with a range of improvements that have yet to be fully implemented.”

Approximately how long will this game be in Early Access?

“Unconfirmed at this time.”

How is the full version planned to differ from the Early Access version?

“・New game endings will be added.
・Steam Achievements will be added.
・Additional content will be added.
・New weapons will be added.”

What is the current state of the Early Access version?

“The game can be played to its completion (only some endings are available).
Additional content is not available to be played.”

Will the game be priced differently during and after Early Access?

“Price may be increased slightly before release.”

How are you planning on involving the Community in your development process?

“The game features a feedback button.”
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About This Game

The story is set in a world two years after a major bioterrorist attack that killed 170,000 people.
The story's protagonist, a journalist, miraculously survived that atrocity and has since devoted himself to solving the mystery of the attacks.
As our story begins, he receives a phone call. The caller tells him they wish to reveal the truth behind the virus used in the attacks two years ago...
Skeptical, he nevertheless follows the directions he has been given and finds himself arriving at a deserted mansion.
What he encounters there is beyond belief...

Let the fear take you in its icy grip.
Try to resist the urge to look over your shoulder as you play.
Experience the ultimate in immersive terror.

【Game Play】
The aim of the game is to use a range of weapons, including handguns, shotguns, and rocket launchers, to defeat terrifying monsters and escape from the mansion and laboratory.
This survival-action horror game is a classic FPS. The player is constantly forced to choose to either fight against their enemies or flee to safety. This management of the limited items available creates gameplay imbued with a sense of palpable tension.
The game also features multiple endings, meaning that the game's conclusion changes dramatically based on the player's actions.

【About QuietMansion1】
The original game, released in 2018 as "KENGOHAZARD," has been remade using modern technology and development techniques. With an all-new map, the title has evolved so much that it plays like an entirely new game.
The demo version, "TEST RE," reached number 1 in the worldwide rankings and proved so terrifying that several streamers were brought to tears.

QuietMansion1 is entirely compatible with 4K HDR, and uses the independently developed KGSR and KGFA technological innovations to provide visuals and gameplay of the ultimate quality.
Even users with concerns about the capacity of their PC specs need not worry - this will play smoothly on any system!
*Also playable on full-HD displays.

The first game to feature the independently developed Enhanced Real Sound Effect (ERSE) audio system, featuring stereophonic sound and realistic physical sound reproduction!
The atmosphere generated by the 3D audio effects creates a brand-new horror experience unlike anything seen before.

【Game Overview】
Title: QuietMansion1
Genre: FPS survival action horror
Play time: 1.5 to 2 hours (plus an additional 2 hours for Extreme Mode and additional content)
Distribution permission: Full (video distribution and monetization permitted for any individual or company)
Hashtag: #QuietMansion

Mature Content Description

The developers describe the content like this:

Contains scenes of blood and violence.
Care has been taken with the depiction of grotesque imagery to avoid the representation of amputated limbs, etc.

System Requirements

    • Requires a 64-bit processor and operating system
    • OS: Windows8.1 / Windows10 / Windows11
    • Processor: Intel® Core™ Series / AMD Ryzen™
    • Memory: 8 GB RAM
    • Graphics: Intel® HD Graphics 4000(HD-Play)
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 2 GB available space
    • Additional Notes: You can also play on laptop
    • Requires a 64-bit processor and operating system
    • OS: Windows10 / Windows11
    • Processor: Intel® Core™ Series / AMD Ryzen™
    • Memory: 8 GB RAM
    • Graphics: GeForce® RTX 2060(4K HDR-Play)
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 2 GB available space
    • Sound Card: Use earphones or headphones for a more realistic experience

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