Single-player games like Galaxy Splitter
Below are 12 single-player Steam games similar to Galaxy Splitter, 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 Galaxy Splitter page.
Ranked picks
- 1

Caves Of Mars
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Caves of Mars is a new 2D sci-fi action adventure space shooter game set in the mysterious caves of the planet Mars. Your mission is to navigate your spacecraft through 100 procedurally generated levels, battle against and destroy enemies and alien lifeforms and collect as many gems as possible.
- 2

Aurelia: Stellar Arising
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Aurelia: Stellar Arising - 3D Turn-based Fleet vs. Fleet Space Combat Game. Choose between two factions and fight for control of the Aurelia System in over 77 missions per faction. Control fleets of up to 9 ships and give maneuver and tactical commands to each ship.
- 3

Space Crisis
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
A spaceship crash landed on Mars! You have to wear a jet and fight!
- 4

The Last From Mars
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
An intergalactic fleet invades Earth and you must fight for your life. The Last From Mars is an endless VR shooter, and the foes will be coming from everywhere. Begin the game with a mighty laser gun, the ability to teleport, and slow time. Fight enemies, get ‘orbs’ and upgrade your weapon.
- 5

Martian Invaders
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
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.
- 6

Last Space Mission
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Last Space Mission is a 3D Wave Shooter in the space where you are the pilot of a spaceship whose planet has been conquered. Fight back and show them that you are the best star pilot in the galaxy and a cunning warrior.
- 7

Where is Earth?
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Where is Earth is a top-down vehicular combat game. Traverse planets, evading threats and obstacles, in search of your crew. Gather resources to assemble upgrades, landing vehicles, space craft, weaponry and support modules to aid you in your fight against an unknown enemy.
- 8

Pink Devil
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Join the fight against alien invaders in Pink Devil. Pilot an upgradable fighter jet through diverse environments, from oceans to deserts. Face unique bosses with distinct tactics and use weapons like machine guns, lasers, and rockets. Become the unstoppable Pink Devil and save the planet.
- 9

Idle Kingdom Builder
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Free To Play with Galaxy Splitter.
Idle Kingdom Builder 👑 Click to create your own kingdom! Coordinate, plan, build and extend your domain. Download the idle-game now and become king!
- 10

Infinite Dronin
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Your challenge: defeat waves of enemies, level your drone and survive as long as you can. Infinite Dronin is a roguelike hack-and-slash arena fighter with a Twitch twist.
- 11

World Splitter
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required.
World-Splitter is a 2D² puzzle platformer challenging you with multidimensional puzzles.
- 12

Minion Raid: Epic Monsters
Single-player alternative to Galaxy Splitter — playable solo, no multiplayer required. Shares Action with Galaxy Splitter.
Conquer a dungeon as a minion trainer - become the hero of the arena!