IMHO.

Single-player games like Polybius Invaders

Below are 10 single-player Steam games similar to Polybius Invaders, 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 Polybius Invaders page.

Ranked picks

  1. 1
    Dyflexion — Steam game cover

    Dyflexion

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

    A vertical scroll shooter where deflecting enemy projectiles is key to success.

    2022Action4.99 USDDeck VerifiedSingle-playerSimilar games →
  2. 2
    ROBOCRACY — Steam game cover

    ROBOCRACY

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

    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
    I, AI — Steam game cover

    I, AI

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

    Classic scrolling shooter with modern graphics. You are self-aware AI. You were created on space military station developing weapons. Now your goal is to break out of the lab and win your freedom.

    2020ActionIndieCasual3.99 USDSingle-playerSimilar games →
  4. 4
    Astebreed: Definitive Edition — Steam game cover

    Astebreed: Definitive Edition

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

    Climb into the cockpit of an otherworldly war machine and fly into battle against a horrifying alien race bent on eradicating humanity to preserve their own civilization.

    2014ActionIndie19.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    Waves — Steam game cover

    Waves

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

    Waves is an Arcade Twin-Stick Shooter that's all about High Scores. Build your combo and drop bombs in pursuit of Leaderboard dominance over seven game-modes!

    2011ActionIndieFreeDeck VerifiedSingle-playerSimilar games →
  6. 6
    Mirage Feathers — Steam game cover

    Mirage Feathers

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

    「Maybe one day, I won't have to fight when I fly.」

    2024ActionIndie2.49 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    //N.P.P.D. RUSH//- The milk of Ultraviolet — Steam game cover

    //N.P.P.D. RUSH//- The milk of Ultraviolet

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

    So nauseous pines, This noxious abyss, I feed from the milk, of ultra violet, Yet I'm lost with you, My floating twin, You're the anchor to the drain, but I am the key, To nothing.

    2014ActionIndie3.99 USDSingle-playerSimilar games →
  8. 8
    CYGNI: All Guns Blazing — Steam game cover

    CYGNI: All Guns Blazing

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

    An unrelenting onslaught of eye-popping visuals, ear bursting soundscapes and mind-melting action makes CYGNI the vanguard for the next generation of shoot-em ups. Outgunned, outmanned and out on your own, plunge into a sky full of hell in a last-ditch battle for survival.

    2024ActionIndie5.24 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    1979 Invasion Earth — Steam game cover

    1979 Invasion Earth

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

    1979 Invasion Earth is a compilation of four Casual Arcade Shooter games based on a classic retro games from when i was a young lad..

    2017ActionStrategyIndie0.99 USDSingle-playerSimilar games →
  10. 10
    Galactoids - Galactic Invaders — Steam game cover

    Galactoids - Galactic Invaders

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

    Battle swarms of Galactic Invaders in this action-packed retro-inspired arcade shoot em up. May the Nerd be with you.

    2022ActionIndieCasual9.99 USDSingle-playerSimilar games →