IMHO.

Single-player games like ST World

Below are 10 single-player Steam games similar to ST World, 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 ST World page.

Ranked picks

  1. 1
    Voxitect — Steam game cover

    Voxitect

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Indie and Simulation with ST World.

    Design buildings by playing. Voxitect is a voxel-based architecture tool with the feel of a sandbox game: click walls, snap floors, cycle windows in, then walk through the room you drew. Real-time shading and lightbake, one-click photoreal renders, cloud-synced spaces, and export.

    IndieSimulationCasualSingle-playerSimilar games →
  2. 2
    Lade's Sandbox — Steam game cover

    Lade's Sandbox

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Indie and Simulation with ST World.

    A voxel-based sandbox game

    2024IndieSimulationCasual2.99 USDSingle-playerSimilar games →
  3. 3
    WorldMaker — Steam game cover

    WorldMaker

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Simulation and Casual with ST World.

    WorldMaker is a tool for creative users that allows you to create photorealistic 3D Worlds using drag-and-drop controls. Transfer ideas directly from your head to a 3D World in seconds. Utilize our library of 1400 objects to create 3D Worlds quickly, with graphics powered by next-gen Unreal Engine 5

    2022SimulationCasualEarly Access9.99 USDSingle-playerSimilar games →
  4. 4
    GLITCHED MATRIX Prototype Lab — Steam game cover

    GLITCHED MATRIX Prototype Lab

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Indie with ST World.

    Enter a virtual arcade packed with playable prototypes, creator tools, chat bots, and mod-friendly experiments inside one evolving digital world.

    2026ActionSportsStrategy9.99 USDSingle-playerSimilar games →
  5. 5
    PROJECT LEVELS — Steam game cover

    PROJECT LEVELS

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Indie and Simulation with ST World.

    PROJECT LEVELS is a creative multiplayer sandbox where you and your friends can build worlds, create interactive experiences and bring your ideas to life together.

    2027IndieSimulationCasualSingle-playerSimilar games →
  6. 6
    PatchWorld — Steam game cover

    PatchWorld

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Simulation with ST World.

    Patch sound, visuals, logic and physics together in 3D to build interactive worlds, musical instruments and games. Create alone or together while everything keeps running, then share and remix what you make.

    2026SimulationEarly AccessSingle-playerSimilar games →
  7. 7
    Nimblehold — Steam game cover

    Nimblehold

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Adventure and Casual with ST World.

    Nimblehold is a cozy mapmaking tool for tabletop games. Paint hills, rivers, and roads that react to each other in real time, then export a finished map with the shadows and detail already done.

    AdventureRPGCasualSingle-playerSimilar games →
  8. 8
    Architecture & Design — Steam game cover

    Architecture & Design

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Indie and Simulation with ST World.

    Design your dream home with the precision of professional architecture software without the complexity. Create a parametric floor plan and watch walls, roofs, and stairs adapt automatically in 3D. Furnish and model, customize materials, explore and share your designs. Total freedom, zero pressure.

    2026IndieSimulationCasual13.49 USDSingle-playerSimilar games →
  9. 9
    Minecraft: Story Mode - A Telltale Games Series — Steam game cover

    Minecraft: Story Mode - A Telltale Games Series

    Single-player alternative to ST World — playable solo, no multiplayer required. Shares Adventure with ST World.

    Episode 1 is now FREE - for a limited time! In Minecraft: Story Mode, playing as either a male or female hero named 'Jesse,' you’ll embark on a perilous adventure across the Overworld, through the Nether, to the End, and beyond.

    2015AdventureDeck PlayableSingle-playerSimilar games →
  10. 10
    Minecraft Legends — Steam game cover

    Minecraft Legends

    Single-player alternative to ST World — playable solo, no multiplayer required.

    Discover the mysteries of Minecraft Legends, a new action strategy game. Explore a gentle land of rich resources and lush biomes on the brink of destruction. The ravaging piglins have arrived, and it’s up to you to inspire your allies and lead them in strategic battles to save the Overworld!

    2023ActionStrategy39.99 USDDeck PlayableSingle-playerSimilar games →