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Sickness

Game overview

Sickness

Sickness is a visual novel centering around Suoh Tesla, an amoral high school student whose life is rapidly deteriorating. Following the deaths of his parents, a brief stay in the hospital, and the emergence of his “Sickness”, his daily life quickly devolves from carefree school days to a life of crime.

Visual Novel Indie Violent Simulation Action
Last tracked players
0
All-time peak
2
24-hour change
Unavailable
Steam reviews
88.8% positive
143 reviews · via SteamSpy

Delayed observation · last tracked . Values marked unavailable are not estimated.

About this game Read the full description
Stats (September 25th 2017)

Word count: 216,000 words

Number of CGs: 85 (plus variations of several)

Number of sprites: 32 (mostly minor characters)

31 original music tracks, + 9 CCA-by tracks







Summary/Plot



Sickness is a Visual Novel following the life of Suoh, a high school student turned violent criminal.



Following the deaths of his parents, Suoh is left without a home or source of income. All he has is his twin sister, Sara, who he promises to provide for, even if doing so means throwing his life away.



Using the entirety of their savings, the two move to another city, wherein Suoh quickly finds work. Sara commutes to her old school, Suoh works long, physically-demanding hours, and the two survive off instant food, barely scraping by. It isn't a happy life, but they make it work.



Or at least they did, until a violent outburst set into motion a rapid descent.



Amid a physical altercation with his boss, Suoh blacks out, waking up to find a corpse laying at his feet. His knuckles bloody, his muscles aching, he realizes that he has just murdered his boss, the person responsible for his continued well-being. But rather than lament the loss of life, all Suoh can think of is how badly he needed the money, and what he'll do next to get it.



Drawn by the scent of blood, one of Suoh's coworkers, a young man with criminal connections, offers him a not so legal revenue stream, one encouraging violent behavior and rewarding the capable.



And from there, everything spirals out of control.



As it turns out, Suoh has a knack for crime, and the petty reservations he had about such acts don't last long. For the well-being of his sister, as well as his own self-interest, he becomes a killer for hire, taking out people anybody his new boss tells him to. He quickly adapts to life as a killer, adopting a double life his sister can never know about.



But his new life is not without trouble. Facing death on a weekly basis is only the beginning; between avoiding police detection, eyewitnesses, and even the malice of his fellow professional killers, Suoh's new life looks to be the death of him.



Will Suoh manage to survive long enough to keep his promise to his sister? Will he turn tail and escape from this life of crime, finding solace in the company of someone or something else? Or will he be hunted down and killed before he ever gets the chance?





Main Characters



Sara Tesla - Suoh's twin sister



Sara is a high school student who harbors complex feelings. To her brother, Sara is an angelic sister with a loving nature and endless affection; an image she cultivates and builds on daily. To everyone else, however, Sara is narcissistic and thoroughly two-faced.

Family aside, Sara doesn't care for other people in the slightest, and as a result of her desperately trying to hide this fact, her family mistakenly believe Sara to be bipolar.





Karasu - An up and coming crimelord



Karasu builds his wealth through a variety of "services", including, but not limited to, gambling, corporate espionage, and organ trafficking. Above all, however, Karasu is most famous for providing "waste disposal" for neighboring towns, whether they request his services or not.

His ultimate goal is to build an empire he can share with his beloved "children"; interesting individuals he has taken under his wing and granted a new lease on life.

Though many view him as a sadistic narcissist who will stop at nothing to obtain what he wants, Karasu is ultimately a simple businessman who displays affection only for a chosen few.





Sai - Karasu's right-hand man



Sai is Karasu's most trusted and capable employee, responsible for overseeing his most lucrative business ventures, despite always working in the shadows. He is also responsible for “breaking in” new recruits, and as such becomes Suoh's teacher.

Unrivaled in what he does, Sai is a ruthless killer who feels no remorse; those who get on his bad side seldom live long enough to realize it.

The only things more important to Sai than his work are his daughter's well-being and happiness.





Misa - Sai's daughter



Misa is a teenage girl who wishes for a normal life.

Being the daughter of a professional killer (and protective father), however, Misa has trained from a young age in order to protect herself from the dangers of the world, and in doing so inevitably became aware of her father's line of work.

As her father's work absorbed her life, Misa adapted her skillset to match those of a killer, using her youth and small figure to become the youngest and most discreet killer among her peers.

Outside of work, Misa is still just a young girl. She's very friendly, once she warms up to someone, and is protective of those close to her.

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Version 1.4.5 Version 1.4.4 Steam deck fix
System requirements Windows · macOS · Linux

Windows

Minimum

Minimum:
  • OS *: Windows XP
  • Processor: 1Ghz
  • Memory: 1 GB RAM
  • Graphics: DirectX or OpenGL compatible card (capable of 1080p output)
  • Storage: 2 GB available space

Recommended

Recommended:
  • OS *: Windows 7
  • Processor: 1.5Ghz dual core
  • Memory: 2 GB RAM
  • Graphics: DirectX or OpenGL compatible card (capable of 1080p output)
  • Storage: 5 GB available space

macOS

Minimum

Minimum:
  • OS: Mac OS 10.4
  • Processor: 1 Gz
  • Memory: 1 GB RAM
  • Graphics: OpenGL compatible card (capable of 1080p output)
  • Storage: 2 GB available space

Recommended

Recommended:
  • OS: Mac OS 10.6+
  • Processor: 1.5Ghz dual core
  • Memory: 2 GB RAM
  • Graphics: OpenGL compatible card (capable of 1080p output)
  • Storage: 5 GB available space

Linux

Minimum

Minimum:
  • OS: Ubuntu 12.04
  • Processor: 1 Gz
  • Memory: 1 GB RAM
  • Graphics: OpenGL compatible card (capable of 1080p output)
  • Storage: 2 GB available space

Recommended

Recommended:
  • OS: Ubuntu 14.04+
  • Processor: 1.5Ghz dual core
  • Memory: 2 GB RAM
  • Graphics: OpenGL compatible card (capable of 1080p output)
  • Storage: 5 GB available space
Game details Languages, features & support
Publisher
Unwonted Studios, Zetsubou
Brazilian rating
14
Steam Germany rating
12
Content warning
Contains depictions of violence, mild sexual references, and deals with mature themes such as mental health, incest, and suicide
Achievements
10
Controller support
full
Features
Single-player, Steam Achievements, Full controller support, Steam Trading Cards, Steam Cloud, Family Sharing
Languages
English
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.

Sources fresh
Native Steam builds
Windows: unknown
macOS: unknown
Linux: unknown
Steam Deck
verified
Valve compatibility test
Input
Controller support: unknown
Structured language support (1)
LanguageInterfaceFull audioSubtitles
EnglishYesNoYes
Steam store page fresh · checked 2026-10-06 PCGamingWiki technical notes External link only; SteamIQHQ does not ingest PCGamingWiki content.
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Game Insights

Buy Verdict

Watch — $2.49.

Decent deal at 75% off, but might drop further. Watch for better opportunities.

▲ ~48 days until next sale

Value Score

Great Value — 94th percentile.

Price-to-player ratio ranks in the 94th percentile. Priced as Market at $2.49.

▲ Market pricing tier

Genre Benchmarks

Player Count Top 9%
Value Ratio Top 6%

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Developer Analytics

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Frequently Asked Questions

Is Sickness worth buying right now?
Watch — $2.49. Decent deal at 75% off, but might drop further. Watch for better opportunities.
When does Sickness go on sale?
Decent deal at 75% off, but might drop further. Watch for better opportunities.
Is Sickness free to play?
Sickness costs $2.49 on Steam.
What genre is Sickness?
Sickness is a Action, Adventure, Indie, Simulation game.
Who developed Sickness?
Sickness was developed by Zetsubou and published by Unwonted Studios.
What platforms does Sickness support?
Available on Steam for Windows, macOS, Linux.

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