Single-player games like orbital defence unit
Below are 8 single-player Steam games similar to orbital defence unit, 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 orbital defence unit page.
Ranked picks
- 1

Tartaron
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
Tartaron is top-down shooter with an old-school art style and a variety of levels to beat. Engage in close-range combat, or snipe your enemies from afar, it's up to you.
- 2

LASERVASION
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
Retro arcade inspired shoot 'em up with addictive combat.
- 3

Be The ONE
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Indie and Casual with orbital defence unit.
You are the last survivor. Your friends and allies got killed during a raid. Can you survive the endless waves of enemies?
- 4

Super Station Swarm
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
A space station, infinite waves, and a screen full of vector geometry trying to kill you. Your turrets auto-fire. Your satellites orbit. This is bullet-hell-yeah. In-game and permanent upgrades. 17 upgrade types across 9 weapon classes. Play, upgrade, repeat.
- 5

Wizard Blaster
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
Wizard Blaster is a top-down time survival roguelite where you play as a wizard. Use magic to fight off hordes of evil. Choose from different characters and abilities to survive.
- 6

CowboysShowdown
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
Cowboys Showdown is a platforming shooter with waves of enemies, bounty hunters and high-ranking criminals who will be well paid to kill. Boxes with bonuses and the ability to buy new weapons will help you in your hard work. Game Features: - hardcore - Pleasant musical accompaniment -Pixel Art
- 7

Digital Frida
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
Digital Frida is a roguelike arena game in stylized 2D graphics.Welcome to the online virtual reality server "Digital Frida", where you can become whoever you want, do whatever you want and be wherever you want!
- 8

Space Shooter
Single-player alternative to orbital defence unit — playable solo, no multiplayer required. Shares Action and Indie with orbital defence unit.
Welcome aboard! Here, we gain points by destroying meteors. Try your best to destroy as many as you can and avoid destroying our ship! This is a wave-type game, where the more you play, the more difficult the game becomes!