IMHO.

Single-player games like Ion Assault

Below are 11 single-player Steam games similar to Ion Assault, 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 Ion Assault page.

Ranked picks

  1. 1
    Beat Hazard — Steam game cover

    Beat Hazard

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

    Experience your music collection like never before with this intense music driven arcade shooter. Each of your songs will have its own unique ebb and flow based on the music.

    2010ActionIndieCasual9.99 USDSingle-playerSimilar games →
  2. 2
    Cute Invaders — Steam game cover

    Cute Invaders

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

    Something great is coming! Something extremely Gigantic and Adorable!

    2022ActionStrategyIndie3.99 USDSingle-playerSimilar games →
  3. 3
    LASERVASION — Steam game cover

    LASERVASION

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

    Retro arcade inspired shoot 'em up with addictive combat.

    2019ActionStrategyIndie4.99 USDSingle-playerSimilar games →
  4. 4
    Swarm Arena — Steam game cover

    Swarm Arena

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

    Take control of a virtual organism in this unique indie arcade title, while unlocking Steam Achievements and climbing the leaderboards!

    2010ActionIndieCasual1.99 USDSingle-playerSimilar games →
  5. 5
    Titan Attacks! — Steam game cover

    Titan Attacks!

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

    As the last surviving tank commander on Earth, single-handedly turn back the evil invading alien army, drive back the Titans across the Solar System, and defeat them on their homeworld... Titan Attacks has the same easy-to-learn and addictive gameplay of the classic arcade shoot 'em up, but is packed full of extras - new features, new...

    2012ActionIndieCasual9.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Steel Alcimus — Steam game cover

    Steel Alcimus

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

    Steel Alcimus is a top-down helicopter shooter. Complete various tasks with your ally aircraft; such as saving the carrier, taking down the buildings, carrying objects, etc.

    2018ActionIndieFree To Play0.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Crimsonland — Steam game cover

    Crimsonland

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

    Thousands of aliens, giant spiders, mutant lizards, and more are on the attack - can you survive the onslaught? Crimsonland is a top-down shooter with a touch of RPG. Unlock over 30 weapons and over 50 perks from quirky to brutal. Complete the quest and show your skills in five survival modes.

    2014ActionIndieRPG13.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    The Hong Kong Massacre — Steam game cover

    The Hong Kong Massacre

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

    Blast your way through the streets of Hong Kong in a fast-paced, top-down shooter. Inspired by classic action movies, The Hong Kong Massacre places you at the center of a hard-boiled revenge story, filled with brutal, cinematic shootouts and vivid underworld locations.

    2019ActionIndie19.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Shatter — Steam game cover

    Shatter

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

    Shatter is a retro-inspired brick-breaking game that merges familiar action with unique twists and a modern crafted production approach.

    2010ActionIndie1.99 USDDeck PlayableSingle-playerSimilar games →
  10. 10
    AsteroidsHD — Steam game cover

    AsteroidsHD

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

    Engage in space-warfare with your friends and foes! Dodge and destroy asteroids while trying to stay alive in multiplayer! Replay value is endless with massive combinations of in-game ship upgrades, modifications, and customization. Destroy Asteroids and Aliens to gain the edge!

    2016ActionIndieSimulation0.99 USDSingle-playerSimilar games →
  11. 11
    Moorhuhn / Crazy Chicken Tales — Steam game cover

    Moorhuhn / Crazy Chicken Tales

    Single-player alternative to Ion Assault — playable solo, no multiplayer required. Shares Casual with Ion Assault.

    Prepare for the wildest ride of your life! Join Moorhuhn and his friends on their greatest adventure searching for the Forsaken Castle of lore.

    2014Casual1.99 USDSingle-playerSimilar games →