IMHO.

Games like 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 header

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Ranked by collaborative filtering across millions of Steam libraries plus content overlap on genres, tags, and developers.

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    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.

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    Hyper Bullet

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

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    2nd Shot

    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 ↗
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    Zenvader

    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 ↗
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    Phrenetic Shooting Reunion

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    2024ActionIndieCasual2.99 USDSteam ↗
  6. 6

    Cosmic Cruiser

    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 ↗
  7. 7

    Distant Space

    Distant Space are present the arcade game of cosmic fights in arcade style of the 80's, this is a game where you can control the spaceship and forced to destroy extraterrestrials, which are moving in the certain order.

    2016ActionIndieAdventure0.99 USDSteam ↗
  8. 8

    THUNDER STRIKER

    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 ↗

More from RETSUZAN

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

  1. 1

    CHAM THE CAT ADVENTURE

    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. 2

    JEWELiNX

    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. 3

    THUNDER STRIKER

    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. 4

    RUMBLE DRAGON

    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. 5

    DANDAN Z

    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. 6

    VERZEUS

    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. 7

    ツクールシリーズ アルティエクエスト [RTA QUEST]

    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, 2nd Shot.
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.

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