Title : Cat Island Petrichor
Original Title : 猫島ペトリコール
Language : Japanese, English, Chinese, etc (Official)
Developer : LuminousNote
Released date : 2026-05-15
https://store.steampowered.com/app/3181890/

As a cat, explore a nostalgic Japanese summer island filled with strays. Solve puzzles, uncover mysteries, and share an intimate, unhurried adventure with the heroine.

About This Game
※This game contains characters who are mentally unstable and expressions that may cause strong anxiety or discomfort.
A tranquil summer island drifts on a calm sea, home to countless wandering cats!


Beneath its peaceful surface lie gentle mysteries waiting to be uncovered.

Drawn to the island’s strange allure, college student Makoto arrives from the outside world in pursuit of its secrets.

You are a white cat living on the island, slipping into narrow spaces, hopping up to high places, and using cat-like actions to help Makoto with her investigation.

What is the mystery hidden within the island that Makoto seeks to uncover?

Will you venture into this heartwarming, yet faintly bittersweet 3D exploration adventure?

Explore the island with your cat-specific actions


A wide variety of cat actions are available to support Makoto’s investigation. Scratch your claws to open paths, climb onto rooftops, race across the island, and more!

Overcome the many challenges awaiting you with feline wit and agility.



Cat Island, separated into five areas across 18 maps, features diverse locations such as the Island Rest Stop, Shrine, Lighthouse, Museum, Ancient Ruins, and Hospital.

As time passes and the weather changes, the island’s atmosphere shifts dynamically.

A richly-detailed island awaits your arrival.

Charming heroines brought to life through a fusion of 3D and 2D


See characters express themselves in 3D environments and 2D dialogue scenes!

Conversation scenes use Spine animation, bringing the characters to life with expressive movements and lively interactions.

Includes a total of 26 still illustrations (72 variations in total).

Enjoy a variety of illustrations that enrich your experiences on the island.


The Final End Reached by Cat and Girl


The mysteries hidden within the island will gradually come to light through your investigation.

As the boundary between human and cat wavers, come and witness the story's final end.

Characters


Makoto

Voice: Minagi Yuu

A young woman who visits the cat-filled island in pursuit of its mysteries.

Gentle and cheerful by nature.

Well liked by everyone and surrounded by friends, yet perfectly comfortable on her own.

Able to befriend anyone she meets, with strong communication skills.

Highly motivated to learn when it comes to the things she loves.



Shiro

A white cat who lives on the island filled with strays.

He claims the area around the harbor as his territory,

spending his days gazing out at the sea from the breakwater.

When Makoto arrives on the island, she gives him the name “Shiro.”

You control Shiro,

and help Makoto with her investigation.



Mio

Voice:Usagi Riko

The only daughter of a local diner and a familiar face known to everyone on the island.

With an easy, friendly nature, she's open-hearted and energetic.

She spends her days playing around or simply drifting by in a daydream.

She shares a close relationship with her mother, whom she affectionately calls “Mama.”



Mitsuki

Voice: Sakitou Erena

The woman who runs the island diner.

She tends to get nervous around new people or in unfamiliar situations.

The diner serves as a place of rest and gathering for everyone on the island.

She shares a close, almost friend-like relationship with her daughter.



Shizuru

Voice:Sumika

A shrine maiden serving at the island’s shrine.

Calm and composed by nature.

She is quiet and reserved around people she has just met.

She has a neat, meticulous side, and can often be seen cleaning the grounds by the shrine.

In her daily life, she eats at the diner and maintains friendly relationships with everyone in town.



Kotoha

Voice:Murasaki Sora

A young woman who works the reception desk at the Island Rest Stop.

Quiet and soft-spoken.

Unhurried and very much her own person, she values spending time at her own pace.

She shows little interest in others and is not particularly comfortable with social interaction.

Contents
Five areas, 18 maps total, including buildings scattered throughout each area

Five heroines

Interaction scenarios for each sub-heroine

Over 214 talk events, large and small

More than 150,000 characters of total text

Over 265 minutes of total voice recordings

Spine animations

More than ten facial expression variations

Costume and pose variations

26 CG illustrations, 72 including variations

Estimated playtime: 6 to 12 hours

Supported languages: Japanese, English, Simplified Chinese, Traditional Chinese, Spanish, Korean

※During development, AI was used for partial texture adjustments.