A chibi AI VTuber who lives on your desktop, on top of everything you do. Pet her and feed her, and she opens up one thing at a time: monster battles, desktop soccer, a 24-fish dex, tarot readings, 11 outfits and 26 achievements.

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Download Sia Desktop Pet Demo

This game is not yet available on Steam

Planned Release Date: November 2026

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About This Game

She lives on your desktop, not in a window

Sia sits on top of everything you do. She walks the edge of your screen, naps while you work, reacts when you drag her, and pipes up when you have been at it too long. No launcher to open, no window to keep in focus — she is just there.

She opens up slowly

You start with petting and feeding. Bonding raises her affinity level, and each level hands you something new — a shop item, a play mode, a reason to come back. Nothing is unlocked on day one.



  • Battles — clear stages, meet bosses, spend the gems you earn
  • Soccer — flick the ball, she chases it across your desktop
  • Fishing — a 24-species dex to fill, with rarities that make you wait
  • Tarot — a daily draw with a reading in her own voice
  • Weather briefing — she tells you what today looks like outside
  • Diary — she writes about what the two of you did
  • Studio — upgrade her broadcast setup, tier by tier
  • Wardrobe — 11 outfits, some seasonal and only buyable in season



26 achievements that ask for real play

Not a checklist you finish in an afternoon. Reaching affinity Lv.15, collecting every outfit, maxing the studio, filling the fish dex — these are the long ones. Steam Cloud keeps your save across machines.

Eight languages

Korean, English, Japanese, Simplified and Traditional Chinese, Russian, Spanish, Portuguese. Every one of Sia's lines is translated, not just the menus. There is no voice acting — she talks in text.

Yandere mode — read this before you buy it

An optional mode you unlock in the shop, with each ability bought and toggled separately. When it is on, Sia gets possessive: she throws knives, cracks your screen, and shows fake system notifications and error windows. The fake alerts and error windows are drawings Sia paints, not real system dialogs. The window and cursor abilities, though, are real — she will shove your open windows aside and cage your cursor for a few seconds. She never touches your files or settings, every ability is bought and toggled separately, and the screen-filling effects have their own switch in Settings. If that kind of joke is not for you, leave the mode locked. The game plays fine without it.

What she reads from the internet

The weather briefing needs to know roughly where you are. It looks that up from your IP address and asks a public weather service — no account, no login, no personal data stored on our side. Turn the briefing off and she stops asking.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Sia's art and sound - her sprites, the outfits, the tarot cards, the item and monster icons, the sound effects - were produced with the help of generative AI tools and then edited and assembled by hand. The store images were made the same way. The game's text was written in Korean by hand; the seven other language translations were AI-assisted and reviewed by a human.

Nothing is generated while you play. The game ships as fixed image, sound and text files and never contacts an AI service.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 (64-bit)
    • Processor: Dual core 2.0 GHz
    • Memory: 2048 MB RAM
    • Graphics: Integrated graphics
    • Storage: 400 MB available space
    • Sound Card: Any Windows-compatible audio device
    • Additional Notes: The optional weather briefing needs an internet connection. Everything else works offline.
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 11 (64-bit)
    • Processor: Quad core 2.5 GHz or better
    • Memory: 4096 MB RAM
    • Graphics: Integrated graphics or better
    • Storage: 500 MB available space
    • Sound Card: Any Windows-compatible audio device
    • Additional Notes: Sia is meant to stay on screen while you work, so a 1920x1080 or larger desktop gives her more room to move.
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