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About Planet Nine
Planet Nine is a single player casual puzzle game with a science fiction theme. It was developed by haizai and was released on September 9, 2026.
Out there somewhere, but nobody has found it — a planet merge puzzle themed around "Planet Nine" Launch planets like billiard balls and merge matching ones, growing from tiny Mercury toward the ninth planet 3-5 minutes per run, played with a mouse. Scores go to global leaderboards
Games Like Planet Nine
Looking for games like Planet Nine? Here are top casual puzzle recommendations with a science fiction focus, selected from player-similarity data — start with Sputnika Game, Planetiles or Petri Panic.
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Frequently Asked Questions
Planet Nine is a casual puzzle game with science fiction theme. Common tags for Planet Nine include science, futuristic, indie, score attack, relaxing and others.
Planet Nine is available on PC, Mac OS and Windows.
Planet Nine was released on September 9, 2026.
Planet Nine was developed by haizai.
Planet Nine is a single player game.
Similar games include Sputnika Game, Planetiles, Petri Panic, CatMelon - Suika Game, POOOOL and others.