IMHO.

Single-player games like Plasma Sky

Below are 8 single-player Steam games similar to Plasma Sky, 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 Plasma Sky page.

Ranked picks

  1. 1
    Nova Swarm — Steam game cover

    Nova Swarm

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

    Pick a ship, dive into readable bullet chaos, take down huge angry bosses, grab the bonus core you probably should have left alone, and chase one cleaner run in Nova Swarm.

    2026ActionIndie3.59 USDSingle-playerSimilar games →
  2. 2
    Blast'N Bounty — Steam game cover

    Blast'N Bounty

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

    Blast’N Bounty is a vertical scrolling shoot’em up featuring 8 stages players can tackle in the order of their choosing. Cruise through a crazy solar system in a mix of pixel art and low poly 3D with action that’s easy to learn but tough to master!

    2026ActionIndie4.99 USDSingle-playerSimilar games →
  3. 3
    Crush The Rebellion! — Steam game cover

    Crush The Rebellion!

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

    The galactic empire is under siege from the rebel scum in all directions! Fight through endless waves of rebel ships using all of the weapons and resources at your disposal as you execute your sole orders: to Crush The Rebellion!

    2026ActionIndie4.49 USDSingle-playerSimilar games →
  4. 4
    Shooting Blaster Big Bang Boom — Steam game cover

    Shooting Blaster Big Bang Boom

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

    Are you gonna shoot? YES! Are you gonna blast? YES! Are you gonna make a big bang? YES! Are you gonna make a big boom? YES! So what do you get? Shooting Blaster Big Bang Boom! Come have some fun, it's Good Time time!

    2020ActionIndieCasual4.99 USDSingle-playerSimilar games →
  5. 5
    Astro Fighters 3 — Steam game cover

    Astro Fighters 3

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

    The aliens have returned. Fight through relentless waves of enemies, dodge impossible bullet patterns, unleash devastating special weapons, and unlock 70 powerful cards that reshape future runs in this action-packed arcade shoot 'em up.

    2027ActionSingle-playerSimilar games →
  6. 6
    Shin Sophstar — Steam game cover

    Shin Sophstar

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

    Shin Sophstar is an electrifying remix built for speed and scoring. With 25+ ship variants, mid-run ship switching, and an aggressive, deeply layered scoring system, it delivers a faster, sharper arcade experience for all skill levels.

    ActionIndieSingle-playerSimilar games →
  7. 7
    VectaGuard — Steam game cover

    VectaGuard

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

    Arcade-inspired shmup action where neon vector caverns explode with modern visuals, dynamic music, weapon upgrades and intense score chasing.

    2026ActionIndie12.99 USDSingle-playerSimilar games →
  8. 8
    Space War: Infinity — Steam game cover

    Space War: Infinity

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

    Vertical semi-procedural shmup with upgrades, real-time enemy waves, and infinite replayability. Level up your ship, unlock 20+ weapons, defeat 5 bosses, and survive endless bullet-hell combat.

    2019ActionIndieCasual2.99 USDSingle-playerSimilar games →