Breed. Build. Bloom. Design ponds and breed prize-winning koi in Koi Oasis.
Koi are not simply fish. They are living artwork.
Koi Oasis is a calm, 3D pond-building and koi-breeding simulator, made by a real koi keeper and inspired by my own backyard pond. Dig your first pond, fill it with koi, and watch them glide through clear water. Then decide how far you want to take it.
Start with a shovel full of dirt and build toward your perfect backyard oasis, or grow it into a full koi breeding enterprise with indoor breeding pavilions and commercial-scale operations. Or just sit back and enjoy the quiet pleasure of owning a koi pond.
THREE CORE PILLARS
TRUE 3D LANDSCAPING FREEDOM
Shape the land with voxel terrain tools. Dig deep trenches, carve hidden rock grottoes beneath the waterline, and build multi-tiered ponds with caves, tunnels and cascading waterfalls.
THE GENETIC MASTER CLASS
Raise and breed over 70 variations of realistic, lifelike koi. Master color and pattern genetics to produce elite koi to sell, show off, or keep for yourself.
THE HOMESTEAD ENTERPRISE
Keep your ecosystem healthy as it grows. Manage filtration and water quality, monitor key water parameters, upgrade pumps, and unlock advanced equipment as your operation expands.
PLAY YOUR WAY
Guided Sandbox: Build your oasis at your own pace, care for your koi, and unlock new equipment and varieties as you progress.
Creative Sandbox: Everything unlocked from the start. Pure, uncapped creativity.
Career Mode: Every decision matters. Balance the joy of koi keeping with running a profitable breeding business.
Koi-Cam: Drop down to water level and follow your prize koi as they glide through the ripples.
ROADMAP HIGHLIGHTS
Now: HUD and shop overhaul, koi breeding
Early 2027: Upgraded water visuals, day/night sun, sound, pause menu and tracking sheets
Mid 2027: Climate, disease and parasites, wildlife and predators, Sandbox and Career modes
Target release: Q3 2027
The full monthly roadmap is in our Steam announcements.
A note from the developer: I'm a first-time game developer and a koi keeper. Thank you for your support. Follow along with monthly updates here on Steam and on YouTube.
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