IMHO.

Single-player games like Slimecity

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

Ranked picks

  1. 1
    Everfront — Steam game cover

    Everfront

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

    A territory-control strategy game where you continuously expand against AI opponents. Master six doctrines, unlock upgrades, and dominate procedurally generated maps.

    2026ActionStrategyIndieSingle-playerSimilar games →
  2. 2
    Hundred Battle — Steam game cover

    Hundred Battle

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

    Grow like a roguelike, draft your party like an auto-battler, command like an RTS — a semi-auto-battler roguelike of a hundred battles.

    2026StrategyIndieSingle-playerSimilar games →
  3. 3
    OrbiTower — Steam game cover

    OrbiTower

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

    The hungry Gooper swarm threatens intergalactic peace. Stop them! Build towers around planets and take control over their orbits. Spin them with all you’ve attached! Collect new towers, powers and upgrades to beat the onslaught of goopers and save the galaxy in this colorful Tower Defense Roguelite!

    StrategyIndieCasualSingle-playerSimilar games →
  4. 4
    For Our King — Steam game cover

    For Our King

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

    A medieval Tower Defense x Autobattler Roguelite. Defend your Keep across escalating waves, recruit different unit types, and cast spells from different Schools of Magic. Spend what you earn on a skill tree with over 300 upgrades, and place them on a Decree Bar with many unique modifiers and mults.

    2026ActionStrategyIndieSingle-playerSimilar games →
  5. 5
    Bannerfall — Steam game cover

    Bannerfall

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

    Bannerfall is a cute-looking but deeply tactical single-player roguelike RTS. Build custom squads of units, equip them with empowering banners and face sieges, skirmishes and story events as you journey through a randomly generated world each run.

    StrategyIndieSingle-playerSimilar games →
  6. 6
    BALL MACHINE — Steam game cover

    BALL MACHINE

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

    BALL MACHINE is real-time strategy driven by pinball. Launch creature marbles, gather red, green, and blue paint energy, and buy units, cartridges, upgrades, structures, and tactical tools. Command the battlefield against the standard AI or asynchronous builds formed from your own past decisions.

    2026StrategyIndieCasual1.79 USDSingle-playerSimilar games →
  7. 7
    Waveguard — Steam game cover

    Waveguard

    Single-player alternative to Slimecity — playable solo, no multiplayer required. Shares Strategy with Slimecity.

    A roguelike tower defense where every run reshapes your strategy. Build your team of towers, combine more than 80 artifacts, and explore a pixel-art world while taking on ever tougher challenges and bosses.

    StrategySingle-playerSimilar games →
  8. 8
    Crimson Quest — Steam game cover

    Crimson Quest

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

    Crimson Quest lets players control a single character that acts as a production base. Players can create units and towers, explore the field, and experience real-time roguelike progression with action elements, offering a unique twist on traditional RTS gameplay.

    ActionStrategyIndieSingle-playerSimilar games →