IMHO.

Single-player games like Space Mash

Below are 8 single-player Steam games similar to Space Mash, 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 Space Mash page.

Ranked picks

  1. 1
    GAZAR — Steam game cover

    GAZAR

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

    GAZAR is an intense vertical arcade space shooter where you fight against an alien fleet destroying the galaxy. Battle through Story Mode or test your skills in Infinity Mode with 5 difficulty levels and leaderboards. GAZAR delivers non-stop action, stunning visual effects, and dynamic combat.

    2026ActionIndieCasualSingle-playerSimilar games →
  2. 2
    VectaGuard — Steam game cover

    VectaGuard

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

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

    2026ActionIndieSingle-playerSimilar games →
  3. 3
    Lober Lobe — Steam game cover

    Lober Lobe

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

    Shoot psychic orbs, collect useful thoughts, upgrade your Probe with speed, maneuverability, satellites, resistance and suppress negative thoughts in this Brain centric, procedurally generated bullet hell shoot 'em up.

    2024ActionIndie7.99 USDSingle-playerSimilar games →
  4. 4
    Mooncall — Steam game cover

    Mooncall

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

    A retro vector arcade rescue game. Fly your ship to save stranded foragers from a crater-scarred moon, then walk the surface to build beacon networks while the asteroid storms close in. Don't ask about the red mushrooms as officially, they aren't there.

    ActionIndieSingle-playerSimilar games →
  5. 5
    Heli-Cats — Steam game cover

    Heli-Cats

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

    Dual elevation horizontal 2D arcade shoot 'em up co-op helicopter action!

    2023ActionIndie14.99 USDSingle-playerSimilar games →
  6. 6
    < STRECT > — Steam game cover

    < STRECT >

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

    Take control and annihilate every invading enemy and stronghold! < STRECT > is a score-attack vertical shmup supporting 1-2 players. Featuring pure mechanics that emphasize destruction and dodging, satisfying explosion effects, and deep hidden secrets, the fight awaits you.

    2027ActionIndieSingle-playerSimilar games →
  7. 7
    Shmup! — Steam game cover

    Shmup!

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

    Arcade-style bullet hell action! 3 ships, 5 special weapons, and screen-clearing bombs. Conquer 5 intense stages with dynamic difficulty—then compete for high scores on online leaderboards.

    2026ActionIndieSingle-playerSimilar games →
  8. 8
    Infinity Lancer — Steam game cover

    Infinity Lancer

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

    Infinity Lancer is a high octane vertical shoot em' up. Race across the galaxy fighting to prevent humanity's annihilation and discover the dark truth behind the endless war.

    ActionSingle-playerSimilar games →