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

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.
- 2

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!
- 3

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.
- 4

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.
- 5

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.
- 6

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!
- 7

Nano Reef
Single-player alternative to Koi Farm — playable solo, no multiplayer required. Shares Simulation and Casual with Koi Farm.
Turn every keystroke into a thriving ocean! Nano Reef is a cozy companion game where typing or clicking earns gold—without interrupting your work. Spend gold to buy marine fish, vibrant corals, and decorations, or feed your fish to interact. Build your unique, relaxing desktop aquarium!
- 8

Smol Kobold Garden
Single-player alternative to Koi Farm — playable solo, no multiplayer required. Shares Indie and Simulation with Koi Farm.
Collect, breed, and train small creatures known as kobolds. Expand your garden and compete in a variety of mini-games in a cozy creature raising game.