IMHO.

Single-player games like Void Source

Below are 14 single-player Steam games similar to Void Source, 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 Void Source page.

Ranked picks

  1. 1
    High Speed Cataclysm — Steam game cover

    High Speed Cataclysm

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    High Speed Cataclysm is the most advanced and frenetic 2D action shooter where you will have to destroy thousands of enemies in order to save the galaxy.

    2020ActionIndie5.99 USDSingle-playerSimilar games →
  2. 2
    ROBOCRACY — Steam game cover

    ROBOCRACY

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    Take on the challenge and face off against a rogue AI bent on enslaving humanity! Strap on your VR headset, step into the boots of a Galactic Ranger, and tear through waves of robots with explosive blasters, devastating shotguns, and an insane arsenal — just like classic arcade shooters!

    2024ActionIndieAdventure11.99 USDSingle-playerSimilar games →
  3. 3
    Tank Warz! — Steam game cover

    Tank Warz!

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    Tank Warz! is an arcade shooter that will keep you entertained with fast paced tank destruction, power-ups, traps, secrets, and an energetic rock soundtrack. You'll possibly enjoy hours of arcade fun!

    2022ActionIndieCasual3.99 USDSingle-playerSimilar games →
  4. 4
    Orbital Survivor — Steam game cover

    Orbital Survivor

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    Orbital Survivor is a physics-based roguelite arcade space shooter. Forge your path to free the galaxy from the Necromancer’s hordes. All set in a synthwave fantasy universe.

    2027ActionIndieSingle-playerSimilar games →
  5. 5
    XenoFeud — Steam game cover

    XenoFeud

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    XenoFeud is an insane top-down twin-stick arcade alien shooter, where you must survive hordes of alien intruders while defending a mysterious object in space.

    2023ActionIndie3.99 USDSingle-playerSimilar games →
  6. 6
    Alastrius — Steam game cover

    Alastrius

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action with Void Source.

    In this explosive on-the-rails shooter pilot powerful Star-Fighters and wage a vast interstellar war. Chart your own course across a galaxy of exotic sci-fi worlds as you carve a path to the Capital. Lay waste to hordes of enemy ships and bring down ruthless bosses. You are the Republics last hope!

    2026Action9.59 USDSingle-playerSimilar games →
  7. 7
    Skyfighter Arcade — Steam game cover

    Skyfighter Arcade

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action with Void Source.

    Skyfighter Arcade is the classic top-down shoot-em-up vertical scroller, with a twist. Outmaneuver increasingly difficult enemies and obstacles. Blast your enemies out of the sky with powerful and unique weapons. Upgrade your weapons and ship to make yourself more powerful.

    2023ActionRPGCasual4.99 USDSingle-playerSimilar games →
  8. 8
    Space Strider — Steam game cover

    Space Strider

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    Space Strider is a 2D Sidescroller Shoot 'em up with Roguelite elements, where you beat hordes of enemies and defeat unique bosses. Unlock, upgrade and level up your Spaceships to become the ultimate Space Strider!

    2024ActionIndieCasual2.99 USDSingle-playerSimilar games →
  9. 9
    ШП - ShP — Steam game cover

    ШП - ShP

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Indie with Void Source.

    Incomprehensible interface errative puzzle game. No instructions! This product includes 3 different puzzles.

    2017IndieSimulation1.99 USDSingle-playerSimilar games →
  10. 10
    CrushBorgs — Steam game cover

    CrushBorgs

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    "Run and Gun" oldschool single-player platformer with NES aesthetics, including an authentic 8-bit chiptune.

    2022ActionIndie4.99 USDSingle-playerSimilar games →
  11. 11
    Castle of no Escape — Steam game cover

    Castle of no Escape

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    Explore the mysterious castle full of monsters and secrets in a quest to collect all the treasures (that will also protect you from the curses on your way) and crush the main boss. The game won't let you exit the castle, no matter how you try. Technically you can win, but there is no end.

    2017ActionIndieRPGFreeSingle-playerSimilar games →
  12. 12
    SoulFrost — Steam game cover

    SoulFrost

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Action and Indie with Void Source.

    This is a short but hard minimalistic scroll shooter where you race against doing too many actions to keep more energy, without which you won't make it to the end. Lightweight narrative art-game.

    2017ActionIndie4.99 USDSingle-playerSimilar games →
  13. 13
    W4RR-i/o-RS — Steam game cover

    W4RR-i/o-RS

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Indie with Void Source.

    Semi-automatic micro-sandbox with a console interface. You decide the fates, but don't see anything actually going on. Imagine your purpose is just to simulate a human's decision making system, in a lack of information beyond the spreadsheet numbers.

    2017IndieSimulation4.99 USDSingle-playerSimilar games →
  14. 14
    ШПМЛ5 (ShPML5) — Steam game cover

    ШПМЛ5 (ShPML5)

    Single-player alternative to Void Source — playable solo, no multiplayer required. Shares Indie with Void Source.

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    2019IndieCasualSingle-playerSimilar games →