SQOOL (Headquarters: Minato-ku, Tokyo; CEO: Kenji Kato), a company operating game media and providing game marketing support services, has launched its in-house developed desktop pet app "Sill Cats" on the PC game platform Steam. The app released as free-to-play on Tuesday, May 12, 2026.
About Sill Cats
"Sill Cats" is a desktop pet app in which small cats live on the user's desktop. The cats walk along the top edges of open windows, jump from window to window to move across the workspace, and curl up to sleep in a corner of the screen. They also react to mouse cursor movement and approach the cursor, respond to clicks, and occasionally break into sudden dashes between 1:00 a.m. and 4:00 a.m. — a behavior known as "the zoomies." A core design principle of "Sill Cats" is the faithful reproduction of real cat behavior. T he app also supports multi-monitor environments, allowing the cats to roam freely across multiple displays.
Pricing and Content
"Sill Cats" is free to play. The free base pack includes two breeds: Abyssinian and Tuxedo. Additional cat breeds will be distributed as paid "Breed Pack" DLC, with each DLC priced at $1.99 USD (¥265 in Japan).
For a limited time, each DLC is available at 10% off through May 19.
The app supports five languages: English, Japanese, Simplified Chinese, Traditional Chinese, and Korean.
Product Overview
Title: Sill Cats
Genre: Casual / Simulation
Release Date: Tuesday, May 12, 2026
Price: Free-to-play (additional breeds available as paid DLC at $1.99
USD per pack)
Platform: PC (Steam) / Windows only
Supported Languages: English, Japanese, Simplified Chinese,
Traditional Chinese, Korean
Developer / Publisher: SQOOL, Inc.
Store Page: https://store.steampowered.com/app/4641700/Sill_Cats/
Comment from CEO Kenji Kato
"Sill Cats is an app that transforms the desktop — a space we use every day for work — into a place where you spend time with cats. We designed it with a careful sense of distance: it never gets in the way of your work, but when you glance up, a cat is there. Whether you already share your home with cats or live in a situation that makes keeping one impossible, we hope you'll enjoy having a small companion living quietly on your desktop."
Related Links
Steam Store Page: https://store.steampowered.com/app/4641700/Sill_Cats/
SQOOL, Inc. Official Site: https://sqool.co.jp/
Promotional Video: https://youtu.be/fgLmFSsReT4
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株式会社SQOOL 加藤賢治
website: https://sqool.co.jp E-mail: kato@sqool.co.jp
YouTube: YouTube: https://www.youtube.com/@gamestudylab
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