Specimen86
Your choices shape the future!
Free · Designed for iPad
About the Game
You are a new observer at a marine research laboratory.
In the lab’s mysterious aquarium, you’ll raise more than just an ordinary fish.
What is this egg… really?
The being you nurture may become a mermaid, a fishman, or something entirely different.
Your choices shape its evolution and story, leading to multiple endings and a shocking truth.
Game Features
Evolve, Observe, Discover
Experience a relaxing idle evolution game where growth paths and endings change based on your actions.
Play at your own pace—perfect for short breaks or bedtime relaxation.
Multiple Endings
Your decisions—feeding, temperature control, conversations, and more—determine the final form.
Explore all branching evolutions to uncover every ending.
Healing Yet Unsettling
Behind the soothing visuals of swimming creatures lies a darker side—
research experiments, DNA extraction, and mysterious “bad endings.”
A blend of cute and eerie, peaceful and ominous.
A Story Worth Exploring
Each specimen you raise generates a research report, revealing the hidden meaning behind your actions.
For players who love theories, mysteries, and deeper lore, the story invites reinterpretation and replay.
Idle Progression
Even while the app is closed, time continues.
Your specimen quietly prepares for its next stage of evolution.
No moment is wasted—research and observation advance naturally.
Elements That Affect Evolution
There’s no single path to evolution.
Affection, water temperature, cleanliness, item usage, and even character interactions—
every small choice can open a new future.
Experiment repeatedly to reach every form and ending.
Collection System
All your evolved specimens and research logs are saved.
Review your collection to see how your decisions connected to each unique outcome.
Piece together the world’s secrets one evolution at a time.
What You’ll Experience
Calm observation of aquatic life in a glass tank
Emotional storytelling as your specimen grows—cute, mysterious, and unsettling moments
The comfort of a healing game mixed with the intrigue of a dark fantasy
Multiple endings that reward replay and exploration
Research reports that reveal how your nurturing influenced the future
Your specimen will react to your care, changing expressions and behavior—
you might even grow attached to it.
Capture those moments and share them via the screenshot & SNS share function.
Recommended For
Fans of idle growth and aquarium simulation games
Players who enjoy healing games with a deeper, mysterious tone
Those who love story games and hidden lore
People looking for a short, relaxing daily game
Players who enjoy cute but eerie, surreal experiences
Collectors who love unlocking every evolution and ending
Gameplay Flow
You’re assigned to an ocean lab, tasked with nurturing a mysterious aquatic specimen.
Use laboratory equipment and special items to maintain its environment and reduce stress.
Even when left alone, time passes and evolution progresses.
Conversations and environmental changes influence the path ahead—
each playthrough may lead to an entirely different result.
Every completed evolution is archived as a research log you can revisit anytime.
Game Overview
“Specimen No.86: Choices and the Future”
is a new-style simulation that combines
idle growth, healing gameplay, branching stories, dark fantasy, and collection elements.
A soothing yet unsettling experience that stirs emotion—
with multiple endings, including bad ones,
your nurturing connects to a larger theme of evolution and destiny.
This is more than a simple aquarium game.
Dive into the story that drifts between healing and unease,
and discover how your choices shape the future.
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
The game over text has been updated.
The developer, Sayaka Noda, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Sayaka Noda
- Size
- 310 MB
- Category
- Simulation
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
9+
- 9+
- Infrequent
Horror/Fear Themes
Contains
Advertising
- Copyright
- © 2025 Sayaka