IMHO.

Single-player games like Koi Farm

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

Ranked picks

  1. 1
    Grow On The Go — Steam game cover

    Grow On The Go

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

    Care for your leafy friends in this cosy plant care sim and explore new locations from the comfort of your store window. Design your dream workshop and find the best companions for each of your pals.

    2023IndieSimulationCasual2.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    GARDEN&BIRD — Steam game cover

    GARDEN&BIRD

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

    The arrival of birds turned the deserted island into a garden, creating your own unique garden in the sandbox!

    2025IndieSimulationCasual9.99 USDSingle-playerSimilar games →
  3. 3
    Nanoquarium — Steam game cover

    Nanoquarium

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

    A whisper-quiet aquarium that lives in the corner of your screen. Collect 200+ real-world fish across tropical, coldwater and reef tanks, breed them for rare strains, run a whole fishroom, and let the tank tick over while you work. No pressure, no fail state — just your fish, drifting.

    IndieSimulationCasualSingle-playerSimilar games →
  4. 4
    Fernhoof Grove: Riding Academy — Steam game cover

    Fernhoof Grove: Riding Academy

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

    Enroll in Fernhoof Academy to become a professional horse trainer. Own and care for horses, design training routines, and improve a horse’s skills through precise riding. Learn equine theory, pass riding exams, and compete in show jumping and cross country on your way to graduation.

    IndieSimulationCasualSingle-playerSimilar games →
  5. 5
    Slime Farm — Steam game cover

    Slime Farm

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

    Dive into Slime Farm Simulator, where you'll play with, and care for the Cutest magical slimes ever seen! Watch as they Evolve in whimsical ways, strategically manage their Elements and moods, and expand your enchantingly cute slime farm.

    2024IndieSimulationCasual5.99 USDSingle-playerSimilar games →
  6. 6
    OddFauna : Secret of the Terrabeast — Steam game cover

    OddFauna : Secret of the Terrabeast

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

    Grow the TerraBeast you live on from a tiny patch of land into a whimsical world! In this fully hand-sculpted, playful systemic sandbox, you'll explore vibrant biomes, farm, craft, build, and befriend the wild OddFauna to create a thriving ecosystem.

    2026IndieAdventureSimulation24.99 USDSingle-playerSimilar games →
  7. 7
    Tiny Slime Farm — Steam game cover

    Tiny Slime Farm

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

    A cozy desktop idle game where cute slimes bounce around your tiny farm while you work or study.

    2026IndieSimulationCasual4.79 USDSingle-playerSimilar games →
  8. 8
    My Singing Monsters — Steam game cover

    My Singing Monsters

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

    Dive into the Musical World of My Singing Monsters! Breed them, feed them, listen to them sing! Breed & collect a menagerie of Monsters, each a living instrument! Build your paradise across 35+ Islands, customize your world, and enjoy endless music! There's never a dull moment in the Monster World!

    2021SimulationFree To PlayCasualFreeDeck VerifiedSingle-playerSimilar games →