IMHO.

Single-player games like Operation: Horumus

Below are 8 single-player Steam games similar to Operation: Horumus, 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 Operation: Horumus page.

Ranked picks

  1. 1
    FleetRush — Steam game cover

    FleetRush

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

    Real-time naval strategy. Build your fleet, defend your base, and destroy the enemy. At your command — ships, submarines, aircraft, and defensive structures.

    StrategyIndieSingle-playerSimilar games →
  2. 2
    Warnet — Steam game cover

    Warnet

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

    Outmaneuver, outbuild, outthink. In Warnet, the map is your ally and your enemy - master its properties, and you master victory.

    ActionStrategyIndieSingle-playerSimilar games →
  3. 3
    Conquerline — Steam game cover

    Conquerline

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

    Conquerline is a real-time strategy and base-defense game where you build and evolve your civilization across eras. Expand your settlement, manage resources, grow your army, unlock new technologies, and use powerful Edicts to shape tactics and secure victory.

    StrategyIndieAdventureSingle-playerSimilar games →
  4. 4
    No One Gets Through — Steam game cover

    No One Gets Through

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

    Shape enemy routes with freely placed towers and grow your defenses through roguelite upgrades. Choose one of three cards between campaign stages, combine five tower types and ten specializations, and hold the line across three chapters, Boss Challenge and Endless modes.

    StrategyIndieCasualSingle-playerSimilar games →
  5. 5
    Void TD — Steam game cover

    Void TD

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

    Build powerful defenses, collect loot, combine effects, and survive evolving waves from the void in a tower defense game driven by ARPG-inspired buildcrafting and persistent progression.

    ActionStrategyIndieSingle-playerSimilar games →
  6. 6
    Next Level: Tower Defense — Steam game cover

    Next Level: Tower Defense

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

    Race-based tower defense. Build your army, defend your king, and send waves at your rivals. Up to 8-player FFA, 2v2 & 4v4 teams, and singleplayer. Crossplay on Windows, Linux, macOS & Steam Deck.

    2026StrategyIndieCasualSingle-playerSimilar games →
  7. 7
    Crisis Commander: Strait Of Hormuz — Steam game cover

    Crisis Commander: Strait Of Hormuz

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

    A satirical 2D strategy game set in the Strait of Hormuz. Control fleets, play cards, and manipulate oil prices. Meanwhile, your incompetent general keeps issuing increasingly unhinged orders. Keep the price of oil where he wants it, or the world will pay the price.

    2026ActionStrategyIndie4.99 USDSingle-playerSimilar games →
  8. 8
    Little Kingdom RTS — Steam game cover

    Little Kingdom RTS

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

    Little Kingdom RTS is an indie real-time strategy game set in a medieval fantasy world. Gather resources, build settlements, raise walls, and grow your small kingdom. Command an army of knights, archers, and mages to fight off rival kingdoms, orcs, and undead.

    2025ActionStrategyIndie1.24 USDSingle-playerSimilar games →