IMHO.

Single-player games like Project: C.E.L.L.

Below are 8 single-player Steam games similar to Project: C.E.L.L., 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 Project: C.E.L.L. page.

Ranked picks

  1. 1
    Mars Incremental — Steam game cover

    Mars Incremental

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy with Project: C.E.L.L..

    A short incremental game about terraforming Mars. Build, automate, and deploy drones to harvest power, gas and water, then watch a quiet, red planet wake into a living world, one horizon at a time. Just follow the instructions: step one, change the entire planet.

    2026StrategyIndieSingle-playerSimilar games →
  2. 2
    Singularity Simulator: Click Is All You Need — Steam game cover

    Singularity Simulator: Click Is All You Need

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy and Simulation with Project: C.E.L.L..

    A clicker/incremental game themed around the technological singularity. Use AI to streamline AI development, build data centers and power plants, and venture into space in pursuit of even more power.

    2026StrategyIndieSimulationSingle-playerSimilar games →
  3. 3
    Astromental Incremental — Steam game cover

    Astromental Incremental

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Simulation with Project: C.E.L.L..

    Mesmerizing incremental idle clicker game about space. When objects collide, you receive matter. Use this matter to unlock and upgrade objects in your star system. Use powerful Abilities. Dive into the Prestige system (Warp) with a wide Skill Tree, and discover new star systems with new bonuses.

    2026IndieSimulationCasualSingle-playerSimilar games →
  4. 4
    Fleshborn — Steam game cover

    Fleshborn

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy and Simulation with Project: C.E.L.L..

    A short incremental game where you are tasked to clean a lab from fleshy growths using your flamethrower. Collect resources and spend them in a vast upgrade tree to unlock new abilities.

    2026StrategySimulationCasualSingle-playerSimilar games →
  5. 5
    Orebits — Steam game cover

    Orebits

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy and Simulation with Project: C.E.L.L..

    Bounce your pickaxe and smash through asteroids in this futuristic mining incremental! Explore a roguelite tech tree, discover gravitational anomalies, and deliver resources back to Earth. Upgrade and explore space to discover what secrets it holds!

    2026StrategyIndieSimulationSingle-playerSimilar games →
  6. 6
    Bottle Flip Inc — Steam game cover

    Bottle Flip Inc

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy and Simulation with Project: C.E.L.L..

    An incremental game about flipping bottles, unlocking and upgrading unique abilities, and turning simple bottle flips into increasingly satisfying moments.

    2026StrategyIndieSimulationSingle-playerSimilar games →
  7. 7
    Pibcremental — Steam game cover

    Pibcremental

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy and Simulation with Project: C.E.L.L..

    A cozy, chaotic idle-incremental clicker about growing a civilisation of tiny creatures called Pibbles in a giant tree, set in a post-human world.

    2026StrategyIndieSimulationSingle-playerSimilar games →
  8. 8
    Smashing Bottles — Steam game cover

    Smashing Bottles

    Single-player alternative to Project: C.E.L.L. — playable solo, no multiplayer required. Shares Strategy and Simulation with Project: C.E.L.L..

    Smashing Bottles is a short and satisfying incremental game where you break bottles to earn money, upgrade your bat, discover new bottles, and cause chaos! Will you smash enough bottles to buy the universe?

    2026StrategyIndieSimulationSingle-playerSimilar games →