IMHO.

Games like OUMUAMUA

If OUMUAMUA is your kind of game, the closest matches are Martian Invaders, Hyper Bullet and THUNDER STRIKER — 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 OUMUAMUA: Use quick reflexes and sharp aim to simultaneously blow up enemies and block alike in this satisfying retro style action brick breaker! The third installment in the Game Buddy series that faithfully recreates the look, sounds, and feel of classic late 80's handheld games!

2024ActionCasual1.99 USDWindowsby RETSUZAN
OUMUAMUA — Steam game cover

Players who liked OUMUAMUA also play

Steam players who put hours into OUMUAMUA 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. Martian Invaders

    WHY THIS

    Top pick for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action with OUMUAMUA.

    WE HAVE ALIENS, YOU DON'T—Blast Martian invaders and flying saucers across 30 stages with robotic voice effects. Use your destructible shield, rescue army men for bonus points, and chase the high score.

    2022ActionIndie0.99 USDSteam ↗
  2. Hyper Bullet

    WHY THIS

    Second-strongest match for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action and Casual with OUMUAMUA.

    Hyper Bullet is a top-down action game replenished with agreeable vaporwave aesthetics, pure joy of combat and gunplay rhythm.

    2021ActionIndieCasual2.99 USDSteam ↗
  3. THUNDER STRIKER

    WHY THIS

    Third-strongest match for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action and Casual with OUMUAMUA.

    Blast your way through enemy territory and level up your versatile arsenal of high-tech weapons in this handheld game style retro shmup!

    2024ActionCasual2.99 USDSteam ↗
  4. 2nd Shot

    WHY THIS

    Ranked #4 for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action and Casual with OUMUAMUA.

    In the vast depths of space, lies a man with a dark past. Setting himself apart from that old life, and seeking justice against wrongdoing instead of being the cause of it, Captain Righteous uses the Freedom Fighter, his trusty space fighter to search for and combat the evil Captain Buster!

    2024ActionIndieCasual4.99 USDSteam ↗
  5. Zenvader

    WHY THIS

    Ranked #5 for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action and Casual with OUMUAMUA.

    Zenvader is a super retro shooter mixed with roguelite elements. Dodge the barrage of bullets, improve your unit, and try to defeat the Alien King!

    2025ActionIndieRPG2.99 USDSteam ↗
  6. Phrenetic Shooting Reunion

    WHY THIS

    Ranked #6 for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action and Casual with OUMUAMUA.

    [CONTENTS] A playable shooting game "PHRENETIC SHOOTING REUNION" + All future updates/bug fixes. Phrenetic Shooting is a retro tasted shooting game. This game provides an exciting experience for retro 2D shooting game funs.

    2024ActionIndieCasual2.99 USDSteam ↗
  7. Dead End City

    WHY THIS

    Ranked #7 for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action with OUMUAMUA.

    A post-apocalyptic arcade shooter. Collect fuel and dodge enemy fire as you fight back against the evil Scorpio gang. Mixes cars, shmups and themes that would have been right at home in 80's anime and arcades..

    2022ActionIndie14.99 USDSteam ↗
  8. Cosmic Cruiser

    WHY THIS

    Ranked #8 for OUMUAMUA fans by collaborative filtering across millions of Steam libraries. Shares Action with OUMUAMUA.

    In this unique shooter from 1984. take on the role of a pilot of an out-dated Cosmic Cruiser, fighting to rescue the crew of a distant space station that had been captured by a raiding party from the sinister Rallom Empire.

    2022Action2.99 USDSteam ↗

Cheaper alternatives

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

  1. POSTAL 2

    WHY THIS

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

    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. Blood and Bacon

    WHY THIS

    Priced ~50% under OUMUAMUA on Steam right now. Shares Action and Casual with OUMUAMUA.

    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 ↗
  3. Peggle Deluxe

    WHY THIS

    Priced ~50% under OUMUAMUA on Steam right now. Shares Casual with OUMUAMUA.

    Take your best shot with energizing arcade fun! Aim, shoot, clear the orange pegs, then sit back and cheer as 10 whimsical teachers guide you to Peggle greatness.

    2007Casual0.99 USDDeck PlayableSteam ↗
  4. shapez

    WHY THIS

    Priced ~50% under OUMUAMUA on Steam right now. Shares Casual with OUMUAMUA.

    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 ↗
  5. Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad

    WHY THIS

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

    "Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad?" is a fast paced shower-simulation where you shower with your 8-bit dad.It's good, clean fun!

    2015ActionIndieSimulation0.99 USDDeck VerifiedSteam ↗
  6. Insaniquarium Deluxe

    WHY THIS

    Priced ~50% under OUMUAMUA on Steam right now. Shares Casual with OUMUAMUA.

    The craziest aquarium game ever! Tend to your fish, keep them happy and they'll reward you with coins and jewels. Buy tank upgrades or egg parts which hatch different in-tank pets. These pets can help you feed your fish, collect coins, or even protect against the aliens that will invade your tank.

    2006Casual0.99 USDDeck PlayableSteam ↗
  7. Montaro

    WHY THIS

    Priced ~50% under OUMUAMUA on Steam right now. Shares Casual with OUMUAMUA.

    Montaro is a DOGE.

    2016IndieCasual0.99 USDDeck PlayableSteam ↗
  8. Bejeweled® 3

    WHY THIS

    Priced ~50% under OUMUAMUA on Steam right now. Shares Casual with OUMUAMUA.

    The biggest, brightest Bejeweled ever! Discover all-new ways to play the world’s #1 puzzle game. Find your perfect match with 8 breathtaking game modes that meet all your moods.

    2010StrategyCasual0.99 USDDeck PlayableSteam ↗

Free alternatives

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

  1. STRAFTAT

    WHY THIS

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

    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 ↗
  2. Awaria

    WHY THIS

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

    Awaria is a short game about working in haunted maintenance tunnels.

    2024ActionIndieFree To PlayFreeDeck PlayableSteam ↗
  3. The Expendabros

    WHY THIS

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

    The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.

    2014ActionIndieAdventureFreeDeck VerifiedSteam ↗
  4. Iron Snout

    WHY THIS

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

    Iron Snout is a fast, colorful and brutal fighting game in which you will be helping a piglet fight for its life against hordes of wolves.

    2016ActionIndieFree To PlayFreeDeck PlayableSteam ↗
  5. UNBEATABLE [white label]

    WHY THIS

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

    A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.

    2021ActionIndieAdventureFreeDeck PlayableSteam ↗
  6. Star Fetchers

    WHY THIS

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

    The introduction to a wild ride with gangsters and deep state conspiracy theories

    2020ActionIndieAdventureFreeDeck PlayableSteam ↗
  7. Magic Archery

    WHY THIS

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

    Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.

    2024IndieSimulationRPGFreeDeck PlayableSteam ↗
  8. Coloring Pixels

    WHY THIS

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

    A relaxing coloring by numbers game. Enjoy completing a variety of images with differing themes, complexity, and sizes.

    2018IndieFree To PlayCasualFreeSteam ↗

More from RETSUZAN

Other recommendable Steam games by RETSUZAN, ranked by review count so the studio's hits land first.

  1. CHAM THE CAT ADVENTURE

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA. Shares Action and Casual with OUMUAMUA.

    Jump, punch, and whip enemies as you guide Cham the Cat through her action packed treasure hunt in this retro action platformer!

    2024ActionAdventureCasual2.99 USDSteam ↗
  2. JEWELiNX

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA. Shares Casual with OUMUAMUA.

    Challenge your creative sorting skills and aim for big satisfying combos in this addictive puzzle game reminiscent of handheld games of classics past!

    2024Casual1.99 USDSteam ↗
  3. THUNDER STRIKER

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA. Shares Action and Casual with OUMUAMUA.

    Blast your way through enemy territory and level up your versatile arsenal of high-tech weapons in this handheld game style retro shmup!

    2024ActionCasual2.99 USDSteam ↗
  4. RUMBLE DRAGON

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA. Shares Action and Casual with OUMUAMUA.

    Hit the streets and pummel baddies in this classic handheld game inspired Beat 'Em Up! Fight solo or double up with a friend for local co-op!

    2024ActionCasual2.99 USDSteam ↗
  5. DANDAN Z

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA. Shares Action with OUMUAMUA.

    Pick your fighter, then strap in for an action packed nostalgia trip beat-down in this fast-paced 2D retro fighting game!

    2024Action2.99 USDSteam ↗
  6. VERZEUS

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA. Shares Action and Casual with OUMUAMUA.

    Blast and weave your way through enemy fire while managing a wide variety of ship power-ups in this retro style horizontal shoot-'em-up!

    2024ActionCasual2.99 USDSteam ↗
  7. ツクールシリーズ アルティエクエスト [RTA QUEST]

    WHY THIS

    Another title from RETSUZAN, the studio behind OUMUAMUA.

    An RPG drawn in nostalgic pixel art has appeared!Three girls set out on a journey to catch up with their hero.Get your equipment in town and prepare for powerful enemies.Dreams and adventures await you!Only Japanese is supported.Other languages are not included.

    2025IndieRPG12.99 USDDeck VerifiedSteam ↗

Frequently asked about OUMUAMUA

How much does OUMUAMUA cost?
OUMUAMUA is listed on Steam at 1.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to OUMUAMUA?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside OUMUAMUA are Martian Invaders, Hyper Bullet, THUNDER STRIKER.
Who developed OUMUAMUA?
OUMUAMUA was developed by RETSUZAN and published by Henteko Doujin.

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 OUMUAMUA.

For library-aware picks tuned to your specific taste, sign in with Steam on the home page.

31 Games Like OUMUAMUA — Ranked for 2026 · imho.run