Games like Planet Nine
Below are 16 hand-picked alternatives to Planet Nine for fans of casual, ranked by imho.run's hybrid recommender. Each pick is scored on three signals: collaborative filtering across millions of Steam libraries (which players who logged hours in Planet Nine also play), content overlap on genres, categories, and storefront tags, and review-mined "vibe" embeddings that catch tonal similarity even when the genre label differs. Sections below cover closest matches, reviewer cross-mentions, free-to-play picks. No login required โ these picks work anchor-only.
About Planet Nine: It should be out there, but no one's found it yet. A planet merge puzzle themed around "Planet Nine" ๐ Flick planets to merge them and grow from small stars into giant planets ๐ 2-5 minutes per play โ casual enough to pick up anytime, and easy to keep coming back to ๐ช
Players who liked Planet Nine also play
Ranked by collaborative filtering across millions of Steam libraries plus content overlap on genres, tags, and developers.
- 1
Ash Battle
Top pick for Planet Nine fans by collaborative filtering across millions of Steam libraries.
Ash Battle is a Sci-Fi minimalist survival game with a Bullet Hell style. Ash is on an unknown planet and has found many enemies who didn't like his visit. Prepare yourself and be ready for battle, because they come in huge numbers.
- 2
Find Cats ๅตๆๅฏป็ซ
Second-strongest match for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Casual with Planet Nine.
โA cute game for cat lovers of all ages! There are several maps and the opportunity to look for furry ones that are hiding intelligently!โ
- 3
NeverDeath
Third-strongest match for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Casual with Planet Nine.
NeverDeath is a fighting game set in our own solar system centuries in the future. Explore the intricacies of the unique left/right fighting system while battling across the solar system as nine distinct characters.
- 4
BOULDER DASH 40th Anniversary
Ranked #4 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Casual with Planet Nine.
BOULDER DASHยฎ 40th Anniversary โ A legend returns! Immerse yourself in 40 years of video game history and experience the classic BOULDER DASHยฎ in an epic anniversary edition!
- 5
Restitched
Ranked #5 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Casual with Planet Nine.
Join Stuffy on a charming platforming adventure as they "restitch" unraveled communities. Unleash your creativity with a robust 2.5D level editor, play dress up with a powerful mix-and-match Wardrobe, and share your creations via Steam Workshop!
- 6
Neon Shot
Ranked #6 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Casual with Planet Nine.
A neon-themed physics puzzle game where you flick a glowing square through challenging levels. Launch, bounce, and strategize your way through stylish mazes filled with momentum-based mechanics and time-based goals.
- 7
TurnOn
Ranked #7 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Casual with Planet Nine.
"TurnOn" tells the spellbinding tale of a brave alien creature and its striking journey through blackout world, in an incredibly colorful and detailed platformer without platforms.
- 8
Surviving Mars
Ranked #8 for Planet Nine fans by collaborative filtering across millions of Steam libraries.
There will be challenges to overcome. Execute your strategy and improve your colonyโs chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.
Free alternatives
Free-to-play games that recommended players of this title also tend to enjoy.
- 1
Doki Doki Literature Club!
Free-to-play pick from the same recommendation pool โ no purchase to try it. Shares Casual with Planet Nine.
The Literature Club is full of cute girls! Will you write the way into their heart? This game is not suitable for children or those who are easily disturbed.
- 2
Bongo Cat
Free-to-play pick from the same recommendation pool โ no purchase to try it.
Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?
- 3
The Murder of Sonic the Hedgehog
Free-to-play pick from the same recommendation pool โ no purchase to try it. Shares Casual with Planet Nine.
Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!
- 4
Indigo Park: Chapter 1
Free-to-play pick from the same recommendation pool โ no purchase to try it.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
- 5
Our Life: Beginnings & Always
Free-to-play pick from the same recommendation pool โ no purchase to try it. Shares Casual with Planet Nine.
A twenty-dollar bill, four summers, fifteen years, and a one of a kind life. Create an experience thatโs all your own in this near-fully customizable visual novel where you grow from childhood to adulthood with the lonely boy next door.
- 6
missed messages.
Free-to-play pick from the same recommendation pool โ no purchase to try it. Shares Casual with Planet Nine.
โgoth gfโs iPhoneโ airdrops you - accept or decline? A love/horror story about life, death, & memes.
- 7
Travellin Cats in Paris
Free-to-play pick from the same recommendation pool โ no purchase to try it. Shares Casual with Planet Nine.
Find 100 cats hidden in Paris, France in this cute hand-drawn hidden object game by Travellin Cats - the original viral hidden cat game creator!
- 8
Virtual Cottage
Free-to-play pick from the same recommendation pool โ no purchase to try it. Shares Casual with Planet Nine.
Virtual Cottage gives you a comfy place to rest and be productive without any distractions. Open the game, set yourself a goal and enjoy the atmosphere.
Narrow it down
Head-to-head comparisons
Frequently asked about Planet Nine
- What games are most similar to Planet Nine?
- Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Planet Nine are Ash Battle, Find Cats ๅตๆๅฏป็ซ, NeverDeath.
- Who developed Planet Nine?
- Planet Nine was developed by haizai.
imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Planet Nine.
For library-aware picks tuned to your specific taste, sign in with Steam on the home page.