IMHO.

Single-player games like ProxOS

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

Ranked picks

  1. 1
    OCTOPTICOM 3D — Steam game cover

    OCTOPTICOM 3D

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

    OCTOPTICOM 3D is a major upgrade to your favorite open-ended puzzle programming game about designing and optimizing optical computing devices. Featuring 3D graphics and gameplay, refined ui, rewritten simulation, all original levels and components plus new additions, histograms and more.

    2024SimulationEarly Access14.99 USDSingle-playerSimilar games →
  2. 2
    The Farmer Was Replaced — Steam game cover

    The Farmer Was Replaced

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

    Program and optimize a drone to automate a farm and watch it do the work for you. Collect resources to unlock better technology and become the most efficient farmer in the world. Improve your problem solving and coding skills.

    2025StrategyIndieSimulation9.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    SHENZHEN I/O — Steam game cover

    SHENZHEN I/O

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

    BUILD CIRCUITS. WRITE CODE. RTFM.

    2016IndieSimulation14.99 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    Comet 64 — Steam game cover

    Comet 64

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

    Comet 64 is a programming puzzle game. The year is 1984. All you got is a Comet 64 home computer and the operator's manual it came with.

    2021IndieSimulation14.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    while True: learn() — Steam game cover

    while True: learn()

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

    You’re a machine learning specialist who makes neural networks but your cat seems to be better at it. Now you must solve puzzles to build a cat-to-human translation system (who knows what else this cat is capable of!). Earn a fortune, buy kickass cat outfits, learn how machine learning really works!

    2019IndieSimulation12.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    Kaizen: A Factory Story — Steam game cover

    Kaizen: A Factory Story

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

    Kaizen is an open-ended puzzle automation game from the original Zachtronics team, set in 1980s Japan. Design, build, and optimize production lines to create iconic products, like calculators, camcorders, and arcade machines.

    2025StrategySimulation9.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    AI Learns To Drive — Steam game cover

    AI Learns To Drive

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

    Train AI to drive! Create your own neural network and watch it evolve from chaos to mastery with the power of evolutionary algorithms and natural selection. Fine-tune the learning process to craft the ultimate AI driver, and test your creation in campaign challenges or on custom-built tracks.

    2025IndieSimulationEarly Access7.49 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Opus Magnum — Steam game cover

    Opus Magnum

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

    Opus Magnum is the latest open-ended puzzle game from Zachtronics, the creators of SpaceChem, Infinifactory, and SHENZHEN I/O. Design and build machines that assemble potions, poisons, and more using the alchemical engineer’s most advanced tool: the transmutation engine!

    2017IndieSimulation19.99 USDDeck PlayableSingle-playerSimilar games →