Single-player games like OUMUAMUA
Below are 14 single-player Steam games similar to OUMUAMUA, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like OUMUAMUA page.
Ranked picks
- 1
Martian Invaders
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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.
- 2
Hyper Bullet
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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.
- 3
THUNDER STRIKER
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 4
2nd Shot
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 5
Zenvader
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 6
Phrenetic Shooting Reunion
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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.
- 7
Dead End City
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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..
- 8
Cosmic Cruiser
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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.
- 9
CHAM THE CAT ADVENTURE
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 10
JEWELiNX
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 11
RUMBLE DRAGON
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 12
DANDAN Z
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 13
VERZEUS
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required. 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!
- 14
![ツクールシリーズ アルティエクエスト [RTA QUEST] — Steam game cover](https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3446550/header.jpg?t=1739979266)
ツクールシリーズ アルティエクエスト [RTA QUEST]
Single-player alternative to OUMUAMUA — playable solo, no multiplayer required.
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.