IMHO.

Games like Planet Nine

If Planet Nine is your kind of game, the closest matches are 重装无限·Metal Infinite, Run and Gun and Planet Miners — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Planet Nine: Control a customizable mech while exploring an alien world in a top down view. Your mission, set by an A.I. is to save the Ninth planet from an alien invasion. Gain levels, find loot and discover the history behind the Ninth Planet.

2019ActionIndieRPG4.99 USDWindowsby Jötunn Games
Planet Nine — Steam game cover

Players who liked Planet Nine also play

Steam players who put hours into Planet Nine also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. 重装无限·Metal Infinite

    WHY THIS

    Top pick for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Planet Nine.

    或许在某个时空里他已经战败了 但是在这里或许可以改写一切,传说最强的赏金猎人! 那段未完的故事 将如何开始又如何结束...

    2020ActionIndieAdventure1.99 USDSteam ↗
  2. Run and Gun

    WHY THIS

    Second-strongest match for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with Planet Nine.

    Run and Gun is an action roguelike shooting game where you mow down thousands of enemies while unlocking newer and deadlier weapons. The enemies won't stop spawning, and your guns won't stop firing. Earn gold each run to unlock permanent upgrades to make your next run deadlier.

    2022ActionRPG1.99 USDSteam ↗
  3. Planet Miners

    WHY THIS

    Third-strongest match for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Planet Nine.

    Control a mining robot and dig for mineral resources on various planets. Transport the valuable ores with your spaceship. Buy or craft upgrades to improve your tools. Defend yourself against the dangers of each planet to mine even the most valuable treasures!

    2024ActionIndieAdventure11.99 USDSteam ↗
  4. Callsign: Stargazer

    WHY THIS

    Ranked #4 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Planet Nine.

    Pilot and customise your mech for the mercenary group Laplace as you take on contracts from different factions in this 2D mecha Action-RPG.

    ActionIndieRPGSteam ↗
  5. MOBILE SUIT GUNDAM SEED BATTLE DESTINY REMASTERED

    WHY THIS

    Ranked #5 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with Planet Nine.

    Become a pilot in the world of Mobile Suit Gundam SEED, for the first time available with English localization! Engage in thrilling, action-packed Gundam battles, complete missions, and tune up your newly acquired Mobile Suits!

    2025ActionRPGCasual29.99 USDDeck PlayableSteam ↗
  6. M.A.S.S. Builder

    WHY THIS

    Ranked #6 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Planet Nine.

    Commander, customize and build your Mechanical Assault Skeleton Suit (M.A.S.S.) and lead the fight against an alien invasion bent on exterminating the human race. The fate of humanity is in your hands.

    2025ActionStrategyIndie24.99 USDDeck PlayableSteam ↗
  7. ARMED SEVEN

    WHY THIS

    Ranked #7 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Planet Nine.

    The year is 1989. 12 years have passed since the Gogoh Army’s invasion of Earth. Exposure to alien technology during the war enabled Earth’s own technologies to take massive leaps forward. International conflict that was previously rife in the history of mankind fell to an all-time low, and the Earth Federation was established as a...

    2015ActionIndie2.49 USDDeck VerifiedSteam ↗
  8. Astebreed: Definitive Edition

    WHY THIS

    Ranked #8 for Planet Nine fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Planet Nine.

    Climb into the cockpit of an otherworldly war machine and fly into battle against a horrifying alien race bent on eradicating humanity to preserve their own civilization.

    2014ActionIndie19.99 USDDeck VerifiedSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Planet Nine at current Steam store prices.

  1. POSTAL 2

    WHY THIS

    Priced ~80% under Planet Nine on Steam right now. Shares Action and Indie with Planet Nine.

    Live a week in the life of "The POSTAL Dude"; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman's autograph, what could possibly go wrong?

    2012ActionIndieAdventure0.99 USDDeck VerifiedSteam ↗
  2. The Test

    WHY THIS

    Priced ~60% under Planet Nine on Steam right now. Shares Indie and RPG with Planet Nine.

    You will answer a series of questions that will reveal truths from deep within. These questions may make you uncomfortable, but with great knowledge comes great sacrifice. Can you make it all the way through The Test, and if you do, are you sure you want the answers you seek?

    2020IndieAdventureSimulation1.99 USDDeck VerifiedSteam ↗
  3. Milk inside a bag of milk inside a bag of milk

    WHY THIS

    Priced ~70% under Planet Nine on Steam right now. Shares Indie with Planet Nine.

    A short story about what sort of challenges everyday little things can be. Help the girl buy milk, be the first not to disappoint her.

    2020IndieAdventure1.49 USDDeck PlayableSteam ↗
  4. Blood and Bacon

    WHY THIS

    Priced ~80% under Planet Nine on Steam right now. Shares Action with Planet Nine.

    This Co-op Shooter , has Day and Night levels, multiple maps, players will take on 25 enemy types and numerous bosses, like Gargantuan Monsters and Minibosses every 10 days as you explore, shoot and run for your life against the onslaught of porcine monstrosities.

    2016ActionAdventureCasual0.99 USDSteam ↗
  5. STAR WARS™ Republic Commando™

    WHY THIS

    Priced ~50% under Planet Nine on Steam right now. Shares Action with Planet Nine.

    You are the leader of an elite squad of Republic Commandos, your mission is to infiltrate, dominate, and ultimately, annihilate the enemy. Your squad will follow your orders and your lead, working together as a team - instinctively, intelligently, instantly. You are their leader. They are your weapon.

    2009Action2.49 USDDeck PlayableSteam ↗
  6. shapez

    WHY THIS

    Priced ~80% under Planet Nine on Steam right now. Shares Indie with Planet Nine.

    shapez is an easy-going, minimalistic factory building game about the automation of shapes through extraction and satisfying production lines. Adapt to increasingly complex shapes and grow your factory across an infinitely expanding map. Your only limitation is your creativity!

    2020StrategyIndieSimulation0.99 USDDeck PlayableSteam ↗
  7. STAR WARS™ Jedi Knight - Jedi Academy™

    WHY THIS

    Priced ~50% under Planet Nine on Steam right now. Shares Action with Planet Nine.

    Forge your weapon and follow the path of the Jedi Jedi Knight: Jedi Academy is the latest installment of the highly acclaimed Jedi Knight series. Take on the role of a new student eager to learn the ways of the Force from Jedi Master Luke Skywalker.

    2009Action2.49 USDSteam ↗
  8. The Test: Hypothesis Rising

    WHY THIS

    Priced ~60% under Planet Nine on Steam right now. Shares Indie and RPG with Planet Nine.

    The second chapter in The Test trilogy. Answer a series of in-depth questions to reveal hidden truths about yourself and unlock secrets to discover how your life can change drastically with just a few, slight modifications. ...But are you sure you want the answers you seek?

    2020IndieAdventureSimulation1.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Doki Doki Literature Club!

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie 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.

    2017IndieFree To PlayCasualFreeDeck PlayableSteam ↗
  2. Life is Strange - Episode 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Planet Nine.

    Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.

    2015ActionAdventureFreeDeck PlayableSteam ↗
  3. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Planet Nine.

    Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!

    2018ActionIndieFree To PlayFreeSteam ↗
  4. Bongo Cat

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Planet Nine.

    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?

    2025IndieSimulationMassively MultiplayerFreeDeck PlayableSteam ↗
  5. ENA: Dream BBQ

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Planet Nine.

    Experience surreal environments and inexplicable characters as ENA in a new wild world.

    2025IndieAdventureFreeDeck VerifiedSteam ↗
  6. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Planet Nine.

    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.

    2024ActionIndieAdventureFreeDeck PlayableSteam ↗
  7. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Planet Nine.

    STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.

    2024ActionFreeDeck PlayableSteam ↗
  8. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Planet Nine.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableSteam ↗

Frequently asked about Planet Nine

How much does Planet Nine cost?
Planet Nine is listed on Steam at 4.99 USD (current store price; Steam sales may reduce this temporarily).
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 重装无限·Metal Infinite, Run and Gun, Planet Miners.
Who developed Planet Nine?
Planet Nine was developed by Jötunn Games.

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.

24 Games Like Planet Nine — Ranked for 2026 · imho.run