IMHO.

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. 1
    Tartaron — Steam game cover

    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.

    2021ActionIndieCasual0.99 USDSingle-playerSimilar games →
  2. 2
    LASERVASION — Steam game cover

    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.

    2019ActionStrategyIndie4.99 USDSingle-playerSimilar games →
  3. 3
    Be The ONE — Steam game cover

    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?

    2021IndieCasual1.99 USDSingle-playerSimilar games →
  4. 4
    Super Station Swarm — Steam game cover

    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.

    2026ActionIndieCasual1.99 USDSingle-playerSimilar games →
  5. 5
    Wizard Blaster — Steam game cover

    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.

    2024ActionIndieRPG0.99 USDSingle-playerSimilar games →
  6. 6
    CowboysShowdown — Steam game cover

    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

    2022ActionIndieCasual24.99 USDSingle-playerSimilar games →
  7. 7
    Digital Frida — Steam game cover

    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!

    2022ActionIndie9.99 USDSingle-playerSimilar games →
  8. 8
    Space Shooter — Steam game cover

    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!

    2024ActionIndieCasual0.99 USDSingle-playerSimilar games →