IMHO.

Single-player games like Atom

Below are 14 single-player Steam games similar to Atom, 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 page.

Ranked picks

  1. 1
    Black Hole Simulator — Steam game cover

    Black Hole Simulator

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

    A simple black hole simulator.

    2021IndieAdventureSimulation0.99 USDSingle-playerSimilar games →
  2. 2
    I Am a Rock — Steam game cover

    I Am a Rock

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

    A rock's solar system odyssey.

    2022StrategyIndieAdventure0.99 USDSingle-playerSimilar games →
  3. 3
    Flower Challenge — Steam game cover

    Flower Challenge

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

    A flower hunter simulator. Here you can walk around the forest and enjoy the nature, meet different animals and, of course, gather flowers.

    2020ActionIndieAdventure199.99 USDSingle-playerSimilar games →
  4. 4
    The Line — Steam game cover

    The Line

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

    Reinventing of 3D puzzles. Experimental gameplay you've never seen before.

    2020IndieAdventureSimulation0.99 USDSingle-playerSimilar games →
  5. 5
    ENCYCLE — Steam game cover

    ENCYCLE

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

    A slightly hallucinogenic puzzle platformer.

    2021IndieCasual1.99 USDSingle-playerSimilar games →
  6. 6
    Meta Lines — Steam game cover

    Meta Lines

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

    When you feel bored, tired and dazzled by the cool game pictures, it's better to play a relaxed, intellectual and simple leisure game Meta Lines, which is suitable for playing while waiting in line for another game. Wish you have a good time !

    2023StrategyIndieSimulation0.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    87 Aftermath: A Rolling Ball Game — Steam game cover

    87 Aftermath: A Rolling Ball Game

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

    The Event of 2187 left no survivors. In an instant, Earth became a barren wasteland - a lifeless rock floating aimlessly through space. Until 4129. That's when Zenith landed. Set years later, 87 Aftermath is the story of a nameless orbling on a quest to escape from Earth and return home.

    2021ActionStrategyIndie9.99 USDSingle-playerSimilar games →
  8. 8
    Unserious Sandbox — Steam game cover

    Unserious Sandbox

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

    A single-player casual game. You play as Sandbox characters, parkour and idle.

    2025IndieCasualEarly Access1.99 USDSingle-playerSimilar games →
  9. 9
    Tree Bonsai — Steam game cover

    Tree Bonsai

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

    An artistic bonsai tree simulation game that follows the life cycle of a plum tree. You can cut branches, add nutrients, and graft while the seasons pass and your tree grows. You can finally fulfill your dreams of a digital bonsai.

    2019IndieSimulationCasual0.49 USDSingle-playerSimilar games →
  10. 10
    Plankton — Steam game cover

    Plankton

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

    Minimalist style game : plankton simulation, an electronic pet generated by math codes. Under your care it will slowly grow up and evolve.

    2016IndieSimulationCasual0.49 USDSingle-playerSimilar games →
  11. 11
    Flower Design — Steam game cover

    Flower Design

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

    A flower arrangement sandbox game. The shapes and colors are freely adjustable and there is a garden where you can build a house and put flowers in.

    2017IndieSimulationCasual0.49 USDSingle-playerSimilar games →
  12. 12
    Jellyfish — Steam game cover

    Jellyfish

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

    A simulation game about the life story of a jellyfish. In this game, I will present the full life cycle of a jellyfish: from an egg to a hydra and finally, after a not very long journey it becomes an adult jellyfish. A work of interactive art to bring the most beautiful of sea creatures to your screen.

    2017ActionIndieAdventure0.49 USDSingle-playerSimilar games →
  13. 13
    Flower Design Ⅱ — Steam game cover

    Flower Design Ⅱ

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

    An artistic floral arrangement simulation game, a vase of flowers can track your mood at the moment.

    2020IndieSimulationCasual0.49 USDSingle-playerSimilar games →
  14. 14
    Yin Yang Space — Steam game cover

    Yin Yang Space

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

    A sandbox FPS game, you can build gardens in the most intuitive and simple way and play with robots.

    2024ActionIndieSimulation0.49 USDSingle-playerSimilar games →