Concise Game Reviews: "BIO SECRET" (Scroll down for the longer version) Game Value: ✅ Recommended for players who crave a horror action-adventure with mature themes and a hauntingly dark narrative. Mature Themes: ✔Non-consensual sex ✔Male protagonist ✔Cuckoldry (Netorare) ✔Tentacle ✔Monster sex ✔Rape ✔Physical restraint ✔Nudity ✔Vaginal ✔Blowjob ✔Handjob …
BIO SECRET
Aoki's photography club adventure turns into a nightmare as they explore the haunted mansion of Mr.
Kokotsu.
With Rin kidnapped and Shinjo missing, players must battle bio-monsters and solve chilling puzzles to uncover dark secrets.
Experience a gripping horror action-adventure filled with intense combat, multiple endings, and a haunting narrative that pushes the boundaries of mature themes.
$9.99
(USD)
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Reviews Summary
While 'BIO SECRET' offers an intriguing blend of horror and mature themes, player reception is mixed.
Many appreciate the unsettling atmosphere and multiple endings, but numerous bugs and frustrating controls detract from the experience.
The explicit content is a highlight for some, but others find the story lacking depth and the gameplay repetitive.
The Good
- Unsettling Atmosphere: Effectively tense.
- Multiple Endings: Choices add depth.
- Mature Themes: Well-integrated explicit content.
- Combat Variety: Diverse weapon options.
The Bad
- Combat: Controls could be smoother.
- Bugs: Frequent glitches disrupt gameplay.
- Story: Lacks depth and originality.
- Short: Game length feels inadequate.
The Horny
- Graphic non-consensual scenes included.
- Intense monster sex and corruption themes.
- NTR elements central to the narrative.
- Censorship present, but scenes remain graphic.
Top rated reviews
Looking for anime-based games? Check out our Steam curator! Resident Evil-genre 2D anime survival horror in an abandoned mansion. Mainly NTR immoral lewd situations including defeated/monster. Multiple endings. 同名世界版。バイオ系2DACT。おもにNTR系のシチュ、敗北/モンスター/純愛もあり。
6 / 10 stars. Overall this is decent game, everything is passable and fairly well done... however, there are some bugs that need to be ironed out to make some parts a little smoother, the combat could use some slight tweaks but isn't horrible, and the controls could do with a slight rework. For those that do try this, it will help to know the Following A…
Game Details
From the developer
Aoki took his photography club friends Rin and Shinjo to an abandoned mansion. There were rumors about the mansion on Mr. Kokotsu, scaring people away. The three students were not afraid and entered the mansion. anyway. Unusual things happens one after another, and......
About This Game
※All characters in this game are 18 years of age or older
*If receiving an error message for missing DLLs, please confirm that the VC2010, VC2012, VC2013, and VC2015 redistributables are installed.For Windows 7 and Windows 8 users, updating to the latest OS version via WindowsUpdate may be required before the rebistributables can be installed.*
Horror Action-Adventure Game with Heroine Cuckold
Friday after school, Aoki took his photography club friends Rin and Shinjo to an abandoned mansion.
There were rumors about the mansion on Mr. Kokotsu, scaring people away.
The three students were not afraid and entered the mansion. anyway.
After they got stuck in the sudden storm, two of them heard Shinjo screaming.
Shinjo went missing, then somebody kidnapped Rin.
The PC booted up itself and started playing a video of Rin and a middle-aged man in a lock-up.
[Characters]
- Osamu Aoki
A devoted fan of abandoned buildings.
A member of the photography club and taking pictures of abandoned buildings.
- Rin Sayama
Started dating Aoki a half years ago. Gets easily frightened.
Gets stuck in an abandoned mansion and......
- Makoto Shinjo
Another member of the photography club.
Good friends with Aoki but feeling awkward around Aoki and Rin.
- M
An ominous man who traps Aoki and his friends in the mansion.
[System]
This is a horror action-adventure game.
Fight against bio monsters with short-ranged (knife, axe), long-ranged (guns), and explosive weapons (grenades).
Art gallery and scene gallery are available.
Most XXX scenes feature cuckold (NTR).
The heroine is voiced.
Arts: 21 Pattern + Variations
Events: 21 Variations
Endings: 2 Variations
Heroine Voice Actor: Miki Honda
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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.