Game overview
Great Deceiver
Marie Mamiya reigns supreme, and by her whim, she'll train an ordinary man into shape—in the pursuit of beauty.
- Last tracked players
- 0
- All-time peak
- 3
- 24-hour change
- Unavailable
- Steam reviews
- 75% positive 168 reviews · via SteamSpy
Delayed observation · last tracked . Values marked unavailable are not estimated.
About this game Read the full description
A visual novel about what happens when a modern-day empress meets an ordinary man.
Marie Mamiya
VA: Shino Nakano
A modern-day empress who reigns on high as the head of the Mamiya Group.
As a young widow, her exceptional talent and sharp insights shot her to the top of the business world like none before her, and she has ruled over it with an iron grip ever since.
Though technically getting on in her years, she maintains an eerily youthful appearance.

Maki Suzuka
VA: Ria Akai
Like the protagonist, Maki shows up at Royal Family to pursue her dream of becoming a fitness instructor. Young, starry-eyed, and friendly to a fault, she hits it off with Yukio at once.
Much to her delight, she’s hired on the spot, too... but is it really what she signed up for?
From the moment she appeared at the Royal Family Fitness Club, an ultra-luxurious gym jointly run by the Mamiya Zaibatsu and Sugimoto Pharmaceuticals, she was instantly in charge. The first thing she did was appoint her own personal trainer, passing over a building full of muscle-bound men in favor of our unimpressive protagonist.
But she'll train him into shape—in the pursuit of beauty.
FEATURES
- 5+ hours of gameplay
- Japanese voice acting
CHARACTER

Marie Mamiya
VA: Shino Nakano
A modern-day empress who reigns on high as the head of the Mamiya Group.
As a young widow, her exceptional talent and sharp insights shot her to the top of the business world like none before her, and she has ruled over it with an iron grip ever since.
Though technically getting on in her years, she maintains an eerily youthful appearance.

Maki Suzuka
VA: Ria Akai
Like the protagonist, Maki shows up at Royal Family to pursue her dream of becoming a fitness instructor. Young, starry-eyed, and friendly to a fault, she hits it off with Yukio at once.
Much to her delight, she’s hired on the spot, too... but is it really what she signed up for?
SUMMARY
Marie Mamiya reigns supreme.From the moment she appeared at the Royal Family Fitness Club, an ultra-luxurious gym jointly run by the Mamiya Zaibatsu and Sugimoto Pharmaceuticals, she was instantly in charge. The first thing she did was appoint her own personal trainer, passing over a building full of muscle-bound men in favor of our unimpressive protagonist.
But she'll train him into shape—in the pursuit of beauty.
Media gallery 5 screenshots · 0 videos
Screenshots
Player activity
Concurrent players over the last 48 hours.
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Latest news
All news on Steam ↗System requirements Windows
Windows
Minimum
Minimum:- OS *: Windows 7 SP1 / 8 / 8.1 / 10
- Processor: Multi-core 1.0GHz+
- Memory: 2 GB RAM
- Graphics: DirectX9 and 3D support
- DirectX: Version 9.0c
- Storage: 500 MB available space
- Sound Card: PCM (DirectSound support)
Recommended
Recommended:- OS *: Windows 7 SP1 / 8 / 8.1 / 10
- Processor: Multi-core 2.0GHz+
- Memory: 4+ GB RAM
- Graphics: NVIDIA GeForce or AMD RADEON(Not on-board)
- DirectX: Version 9.0c
- Storage: 1500 MB available space
- Sound Card: PCM (DirectSound support)
- Additional Notes: Recommended resolution: 1920×1080
Game details Languages, features & support
- Publisher
- Shiravune
- Brazilian rating
- 12
- Steam Germany rating
- 12
- Content warning
- Contains suggestive themes, brief depictions of threats and harassment, mild violence, crude humor and crass language, partial nudity.
- Features
- Single-player, Steam Cloud, Family Sharing
- Languages
- English, Traditional Chinese
- Website
- Official website ↗
- Support
- Support site ↗
Compatibility & accessibility Steam Deck, controllers & access features
Can I Play This?
Steam declarations and Valve's Steam Deck compatibility result. Missing data is shown as unknown, never unsupported.
Native Steam builds
Windows: unknown
macOS: unknown
Linux: unknown
Steam Deck
unsupported
Valve compatibility test
Input
Controller support: unknown
Structured language support (3)
| Language | Interface | Full audio | Subtitles |
|---|---|---|---|
| English | Yes | No | Yes |
| Traditional Chinese | Yes | No | Yes |
| Japanese | No | Yes | No |
Steam store page
fresh · checked 2026-09-29
PCGamingWiki technical notes
External link only; SteamIQHQ does not ingest PCGamingWiki content.
More analysis Activity patterns, updates & developer tools
Game Insights
Buy Verdict
Wait — $19.99.
Wait for upcoming sale in ~13 days for potentially better pricing.
▬
~13 days until next sale
Value Score
Great Value — 92th percentile.
Price-to-player ratio ranks in the 92th percentile. Priced as Market at $19.99.
▲
Market pricing tier
Genre Benchmarks
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Developer Analytics
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Frequently Asked Questions
Is Great Deceiver worth buying right now?
Wait — $19.99. Wait for upcoming sale in ~13 days for potentially better pricing.
When does Great Deceiver go on sale?
Wait for upcoming sale in ~13 days for potentially better pricing.
Is Great Deceiver free to play?
Great Deceiver costs $19.99 on Steam.
What genre is Great Deceiver?
Great Deceiver is a Adventure game.
Who developed Great Deceiver?
Great Deceiver was developed by Empress and published by Shiravune.
What platforms does Great Deceiver support?
Available on Steam for Windows.
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