IMHO.

Single-player games like Atom Horde

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

Ranked picks

  1. 1
    One More Depth — Steam game cover

    One More Depth

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

    A fast-paced, 4-player co-op action RPG. As an orphan, dive into twisted realms to retrieve the legendary "Precious." Don't let the cute art fool you—lethal threats await in the abyss. Dual-Class Builds: Mix and match classes with diverse loot to craft thousands of unique combat styles.

    ActionIndieEarly AccessSingle-playerSimilar games →
  2. 2
    Bananageddon — Steam game cover

    Bananageddon

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

    Bananageddon is a roguelite in which you will have to create and adapt your equipment to defeat the hordes of animals, who will try to prevent you from getting out with the bananas harvested for your tribute!

    ActionIndieCasualSingle-playerSimilar games →
  3. 3
    Escape From Z — Steam game cover

    Escape From Z

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

    Make your way through a crumbling, zombie-infested building. Each floor is different. Every decision matters. If you can escape...

    ActionIndieEarly AccessSingle-playerSimilar games →
  4. 4
    Iron Core: Mech Survivor — Steam game cover

    Iron Core: Mech Survivor

    Single-player alternative to Atom Horde — playable solo, no multiplayer required. Shares Action and Casual with Atom Horde.

    100 years after a nuclear apocalypse, an AI-managed shelter and its guardian mechs await human survivors. The shelter’s reactor creates safe zones to improve living conditions. Players control mechs to gather reactor fuel, fend off mutants, complete missions, and protect survivors.

    2025ActionStrategyAdventure6.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Disaster Plan Z — Steam game cover

    Disaster Plan Z

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

    Disaster Plan Z is a hardcore single-player shooting survival game set in a post-apocalyptic world. Players need to utilize various weapons along with their unique skills, construct different buildings, and continuously upgrade to resist the invasion of countless zombies and mutant creatures.

    ActionIndieAdventureSingle-playerSimilar games →
  6. 6
    Modavuj Save The Babies — Steam game cover

    Modavuj Save The Babies

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

    Save The Babies is an adventure game where you enter into armed conflicts with robots and try to overcome many platform obstacles. In 8 levels, you need to save 8 girls by overcoming obstacles that become more difficult as you progress.

    2025ActionStrategyIndieFreeSingle-playerSimilar games →
  7. 7
    Mega City Force — Steam game cover

    Mega City Force

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

    Retrowave Action Roguelike featuring tough agents battling crime to the electrifying music of artists like Droid Bishop, Timecop1983, and more! Choose your agent and dive into hardcore action against enemies and bosses, utilizing a vast arsenal and special abilities that will define your playstyle

    2023ActionIndie14.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Dead Broke — Steam game cover

    Dead Broke

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

    An arena roguelite where money is your life, your ammo, and your currency. Shoot, gamble, and survive in a casino from hell: every bullet costs, every coin saves you. 13 characters, 5 endings, and local co-op. The House always wins... until you stop owing it.

    2026ActionStrategyIndieFreeSingle-playerSimilar games →