IMHO.

Single-player games like NULLVECTOR

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

Ranked picks

  1. 1
    Neon Swarm — Steam game cover

    Neon Swarm

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

    A pure neon arcade survivor-like: dodge swarming hordes, dash through walls of bullets and forge devastating builds from 200+ synergizing items. 6 ships with unique ultimates, 8 mega-bosses, rising Threat levels, endless mode and a daily challenge.

    ActionSingle-playerSimilar games →
  2. 2
    Cosmic Run — Steam game cover

    Cosmic Run

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

    Cosmic Run is a single-player space roguelite where you battle relentless galactic enemies, strategically upgrade your ship, and help the Zogark family survive their journey across the galaxy. Build powerful combinations, adapt to chaotic encounters, and escape one broken system after another.

    2026ActionStrategyIndie9.89 USDSingle-playerSimilar games →
  3. 3
    Super Robot Survivors — Steam game cover

    Super Robot Survivors

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

    From the Creative Director of Destroy All Humans! 2 and co-creator of the original TY the Tasmanian Tiger comes a chaotic bullet heaven with objectives. Rescue astronauts, repair reactors, and hack terminals while dodging hundreds of enemies in high-stakes, 10-minute showdowns.

    ActionIndieAdventureSingle-playerSimilar games →
  4. 4
    Neon Pulsefire — Steam game cover

    Neon Pulsefire

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

    Fullfill your ultimate power fantasy and defeat endless waves of enemies in this challenging sci-fi bullet-hell roguelite. Unlock unique classes and upgrades to create powerful builds as you weave your way through enemies, arena hazards and projectile assaults.

    2026ActionIndieCasualSingle-playerSimilar games →
  5. 5
    Geometry Rift: Apocalypse — Steam game cover

    Geometry Rift: Apocalypse

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

    Imagine the frenetic chaos of Geometry Wars colliding with the addictive progression of Vampire Survivors. That's Geometry Rift — a relentless auto-fire action experience where geometric enemies flood the screen and your only option is to shoot, dodge, and survive.

    2026ActionSingle-playerSimilar games →
  6. 6
    XENOFLEKT — Steam game cover

    XENOFLEKT

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

    XENOFLEKT is a roguelite space shooter where you will turn enemy bullets into armory: dash into enemy fire to parry and deflect shots, heal your ship, and trigger devastating counter-attacks. Unlock parts, plug-in unique perks with satellites, and get ready to master hundreds of deadly synergies.

    2026ActionIndieCasualSingle-playerSimilar games →
  7. 7
    Wirehawk — Steam game cover

    Wirehawk

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

    Wirehawk is a retro boomer shmup: a top-down vertical bullet-heaven shooter in pure neon vector wireframe. Blast asteroids and alien waves, grab power-ups, dodge bullet storms and slow time with stasis - one ship, one laser, no mercy. Fly with mouse or gamepad. Autofire always on.

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

    Approaching Infinity Survivors

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

    A Bullet-Heaven roguelike in the Approaching Infinity universe with both spaceship and away team missions. The exit of the galaxy's dominant races left a power vacuum that everyone wants to fill. Survive, pick a side, or kill'em all. No time to think when the horde's advancing.

    ActionIndieRPGSingle-playerSimilar games →