IMHO.

Single-player games like Interstellar Rift

Below are 11 single-player Steam games similar to Interstellar Rift, 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 Interstellar Rift page.

Ranked picks

  1. 1
    Empyrion - Galactic Survival — Steam game cover

    Empyrion - Galactic Survival

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

    Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion!

    2020StrategyIndieAdventure19.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    Avorion — Steam game cover

    Avorion

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

    A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.

    2020ActionIndieSimulation24.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Stellar Shipyard — Steam game cover

    Stellar Shipyard

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

    Stellar Shipyard is a space colony sandbox where you design modular ships and stations, and automate resource production using drones and workers. Let the automated systems fly even the most improvised designs. Face rival factions and threats solo, or alongside friends as allies or rivals.

    StrategyIndieAdventureSingle-playerSimilar games →
  4. 4
    Asteroid Rodeo — Steam game cover

    Asteroid Rodeo

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

    Asteroids are worth trillions. They're also spinning at 200 meters per second. You are a Wrangler—harpoon tumbling rocks, wrestle them to a dead stop with your custom-built ship, and mine them for credits. The pay is good. The survival rate is a conversation people avoid.

    2026ActionIndieSimulationSingle-playerSimilar games →
  5. 5
    Droneboi: Conquest — Steam game cover

    Droneboi: Conquest

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

    Build, fly, and battle in Droneboi: Conquest - the ultimate space sandbox game! Explore Conquest, engage in combat, and upgrade your ship. Start your space journey today!

    2022ActionIndieAdventure8.99 USDSingle-playerSimilar games →
  6. 6
    MineEngineer — Steam game cover

    MineEngineer

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

    Mine. Build. Survive. Engineer your way through the cosmos in this 2D space engineering sandbox!

    ActionIndieAdventureSingle-playerSimilar games →
  7. 7
    Starship EVO — Steam game cover

    Starship EVO

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

    Mine and craft your way to orbit, build your own starship and explore a vast, dangerous galaxy alongside your crew. For players who love a meaningful survival progression, a unique and elegant building system, and epic space-opera scale.

    2020ActionIndieAdventure24.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Osiris: New Dawn — Steam game cover

    Osiris: New Dawn

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

    Osiris: New Dawn is an unforgiving near future space survival game with a cinematic feel and elements of horror. Play as a Mission Specialist in single or multiplayer to build your planetary base, pilotable vehicles, and controllable drones as you explore a dangerous solar system far from Earth.

    2023ActionIndieAdventureDeck PlayableSingle-playerSimilar games →
  9. 9
    Space Engineers — Steam game cover

    Space Engineers

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

    Space Engineers is a sandbox engineering game where you design and build ships, stations, and planetary bases in a fully destructible environment. Explore planets and space, mine resources, survive hazards, and engage in combat alone or with friends in Creative or Survival modes.

    2019ActionStrategyIndie9.99 USDSingle-playerSimilar games →
  10. 10
    Stormworm+ — Steam game cover

    Stormworm+

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

    Stormworm+ is a Fast-Paced Reflex-Driven Arcade Game backed with colorful visuals and an original soundtrack! Inspired by the arcade games of old, collect, grow and aim for the top spot on the leaderboards!

    2016IndieFreeDeck PlayableSingle-playerSimilar games →
  11. 11
    Stormworks: Build and Rescue — Steam game cover

    Stormworks: Build and Rescue

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

    Join a world where you design, create and pilot your own air sea rescue service. Release your inner hero as you battle fierce storms out at sea to rescue those in need.

    2020Simulation24.99 USDDeck PlayableSingle-playerSimilar games →