We Love It's Guide toβ¦
Out there somewhere, but nobody has found it β a planet merge puzzle themed around "Planet Nine" π Launch planets like billiard balls and merge matching ones, growing from tiny Mercury toward the ninth planet π 3-5 minutes per run, played with a mouse.
Released 09 Sep 2026
Out there somewhere, but nobody has found it β a planet merge puzzle themed around "Planet Nine" π Launch planets like billiard balls and merge matching ones, growing from tiny Mercury toward the ninth planet π 3-5 minutes per run, played with a mouse. Scores go to global leaderboards πͺ
Developed by haizai Β· Published by RED GAUGE STUDIO
Planet Nine has about 7 positive and 1 negative player reviews out of a total 8. We'll add a detailed breakdown here when there are more reviews.
It's out there somewhere, yet no one has ever found itββthe "ninth planet". Collide cute planets together, merge them, and uncover the secret yourself.
Launch a planet like a billiard ball and send it crashing into another of the same kind β they'll merge into one! Grow from tiny Mercury toward the larger planets, one merge at a time. 3-5 minutes per run, played with just a mouse. Perfect for a quick break, and easy to come back to again and again.
A cast of original, adorable planet characters
A unique physics-based merge system β think billiards, but in space
Merging planets can send others flying your way β deflect them before they cross the line!
A cozy, relaxing space world to get lost in
Playable in 17 languages, including English and Japanese
Your high scores go to both your country's leaderboard and the global one, ranked across daily, monthly, and all-time boards. How far can you climb? And what will you find when you finally reach the ninth planet...?
Spend the coins you earn to unlock music, themes and illustrations. The more you collect, the more your own version of the universe changes.
The music features six guest composers (neruko / Sentaku / asMi / κ²κ κ / Kadan / NemCa) alongside eleven more musicians selected through an open call.
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Streaming, Let's Plays, and video uploads are welcome. No permission needed, no reporting required.
Monetization through a platform's official features is fine, and the music and sound effects that play during gameplay may stay in the recording.
Full details are on the official site under "Video & Streaming Guidelines".
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| Platforms | Windows, macOS |
|---|---|
| Achievements | 39 |
| Age ratings |
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| Controller support | Xbox |
| Controller required | No |
| DLC / extras | 1 listed on Steam |
| AI disclosure | This game includes content created with generative AI during development. No content is generated live during gameplay.Music: Some background music tracks were created using music generation AI (e.g. Suno AI).Images: Some illustrations and background images were created using image generation AI.This includes works created by the developer as well as works submitted by third parties through an open call and individual commissions. For submitted works, contributors confirmed the AI tools and external assets used, their ownership of necessary rights, that no third-party rights are infringed, and that commercial use is permitted. |
| AI disclosure categories |
|
| Website | Official website |
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