Specimen86

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.