Usually visual novels fall into one of two categories: choice filled and kinetic. Choice filled is obviously with branching stories while kinetic have no choices and are totally linear. Bios Ex is kind of in the middle. It has fewer choices than many visual novels but the ones it does have are ones with a big impact and implications. I thought I was going t…
Bios Ex - Yami no Wakusei
Eiza's life hangs by a thread as he awakens in a cold cell, accused of a crime he can't remember.
In the eerie confines of Sapporo's psychiatric hospital, he must navigate a web of deception and uncover the truth about his past while forging connections with three captivating women.
With a gripping narrative and a haunting soundtrack, 'Bios Ex - Yami no Wakusei' invites you to unravel a dark mystery that will keep you guessing until the very end.
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Reviews Summary
Players appreciate the intriguing story and retro aesthetic of 'Bios Ex - Yami no Wakusei,' praising its atmosphere and character depth despite some criticisms.
However, many feel the execution lacks polish, with rushed storytelling and superficial character development detracting from the overall experience.
While the game has potential, it may leave some players wanting more depth and engagement.
The Good
- Intriguing and dark narrative twists
- Strong retro visual and musical style
- Well-drawn characters and backgrounds
- Engaging atmosphere that pulls you in
The Bad
- Rushed storytelling and character development
- Minor bugs and launch issues reported
- Limited choices with significant impact
- Art style criticized for unnatural proportions
The Horny
- Features a character with impressive décolleté
- Romantic elements with three unique girls
- Partial nudity adds to the allure
- Some players enjoyed the character interactions
Top rated reviews
Bios Ex This Visual Novel is a mystery about a man who was put inside a asylum for reasons he forgot with many questions and big boob women! I have a hard time recommending this visual novel, the story for some reason does not grab my interest. The "mystery" failed to intrigue me in any way. You could call some parts of the plot generic but even generic …
Wearing its influences on its sleeve, Gogen Soft’s psychological thriller, is an ode to the visual novel scene of the ‘90s - and more than a fine read. Sure, it won’t win any awards for its original, long, multi-branching story, or high replayability, yet Bios Ex - Yami no Wakusei’s strong atmosphere, well-written characters, and great writing, manage to sa…
Game Details
From the developer
Enter in Bios Ex the visual novel inspired by anime an visual novel old school . Eiza, accused of causing a terrorist attack in the year of 1995 , is imprisoned in Sapporo's maximum security prison and must find a way to prove his innocence.
About This Game

Sapporo 1997
When Eiza wakes up on the cold floor of a jail cell, his mind is completely blank. He remembers only two things: his name and that he’s not a terrorist. However, the government seems to think the opposite; they accuse him of a bombing attack to the local University in his hometown. Journalists, media, police officers…everyone blames it on him.
It’s a death sentence. But only if the Ori Asylum will declare he wasn't mentally stable at the moment of the attack, there will be a chance to save him from the grim reaper. To determine his psychological conditions, he was sent to the psychiatric hospital of Sapporo; there, he finds himself trapped in an unsettling, suffocating reality that makes him doubt the truth of everything he’s been told until that moment. Between mixed memories and unexplainable events, he meets three girls who’ll change his life: Innocent Shizune and her mysterious sketchbook, the alluring vice-director Nao and Supra with her sad eyes.
If Eiza wants to break free from his cage, he has no other choice than investigate and discover the truth about who he is and what he has done.

Kink Breakdowns
The game includes three female characters with whom the protagonist can develop relationships, indicating a focus on female perspectives.
The presence of three captivating women suggests a focus on male perspective.
The protagonist's journey and relationships imply a self-insert mechanic for players.
Comments (123)
Most recent community feedback.
Horniness scale
Each game gets a score from 1 to 5 hearts. Higher means more explicit adult content.
| Score | What it means |
|---|---|
| 1 | Raunchy / softcore — suggestive themes, light fanservice, or mature humor; little or no on-screen explicit sexual content. |
| 2 | Spicy but restrained — clear adult intent (nudity, strong innuendo, or brief suggestive scenes) without sustained explicit focus. |
| 3 | Clearly adult — recurring sexual content or nudity as a meaningful part of the experience, but not the sole focus of the game. |
| 4 | Strongly explicit — graphic sexual themes, extended explicit stills or text, or gameplay built heavily around adult situations. |
| 5 | Explicit and often animated — graphic sexual content that is frequently animated or interactive; core to what you see and do in the game. |
Zestine
Love the visuals and the side missions. The character banter is top tier.
Nyra
Story is solid and the combat feels great, just wish there was more UI customization.
Kiro
I keep coming back after every update. The new scenes were worth it.