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Aquaculture Simulator
Run your own fish farm in first person. Keep the water alive, raise trout, eels, sturgeon and koi, breed 25 koi varieties, and sell through customer orders, an online market, your farm shop and a show hall where you haggle face to face.

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Features
Single-player
Online Co-op
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔
German ✔
French ✔
Spanish - Spain ✔
Portuguese - Brazil ✔
Simplified Chinese ✔
Japanese ✔
See all 7 supported languages

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“This game lives or dies on its numbers. How fast a trout gains weight, how hard oxygen and ammonia push back, how often a young koi turns out to be worth keeping — none of that can be tuned in isolation. I need people playing it, failing at it, and telling me where it feels wrong. That is not something one person can simulate alone.”

Approximately how long will this game be in Early Access?

“6 Months approx”

How is the full version planned to differ from the Early Access version?

“The core loop will stay the same. What I plan to grow during Early Access is the depth around it.

I would like to add more species, more equipment and filtration options and more freedom in how the farm is laid out, and to finish co-op. I am also looking at more customer types and contract structures, so the market pushes back harder as the business grows.

The part I care about most is the economy. Right now the numbers are mine alone. The goal for 1.0 is a balance that has survived contact with players who break things I never thought to try.

Plans may change as I learn what actually works in play. I would rather adjust the direction than ship a longer list that does not hold together.”

What is the current state of the Early Access version?

“Playable, with the core systems in place. You can raise trout, eels, koi and sturgeon, breed 25 koi varieties, strip sturgeon for caviar, manage water chemistry, build ponds, a farm shop and a show hall, hire staff, and sell through customer orders, an online market, the shop and the show hall. The game is available in seven languages. Co-op is in testing. The systems work, but the balance is still unproven, and that is exactly what Early Access is for.”

Will the game be priced differently during and after Early Access?

“Yes. The price will rise when the game leaves Early Access. Buying now costs less and helps decide what the finished game looks like.”

How are you planning on involving the Community in your development process?

“Through the Steam forums, a Discord, and public patch notes. I am one person with a full-time job elsewhere, so I will not promise instant replies — but I read everything, and the balancing decisions will be made in the open.”
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Join the Aquaculture Simulator Playtest

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This game is not yet available on Steam

Planned Release Date: 2026

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About This Game

Build and run a working fish farm in first person. You carry the feed, net the fish, rinse the filters and stand behind the counter yourself. Start small and grow into a hall full of tanks, outdoor ponds, a farm shop, a show hall and your own staff.

Four species, four businesses

  • Rainbow trout are volume. Sold by the kilo, thin margin, predictable as long as the water holds. They demand cold, oxygen-rich water and do not forgive mistakes.
  • Eels are your second food fish. You buy in glass eels and raise them to market size, in the hall or out in the ponds.
  • Koi are judgement. Value comes from pattern, colour and body shape, from pond quality to show quality. One fish can be worth a hundred trout, or almost nothing.
  • Sturgeon are your luxury line. You strip the roe, the fish survives, and the caviar goes over your own counter in tins.

25 koi varieties to breed

From the common Kohaku to the rare Kin Ki Utsuri, with Ginrin and Doitsu forms of every variety and a Kumonryu whose pattern drifts with the seasons. Closed groups breed true, six crossing bridges lead to varieties that are hard to get otherwise, and the right breeding line makes rare koi far more common than buying them ever could.

The stud book keeps parents and grandparents for every fish, shows what a cross was expected to give and what it really gave, and leaves every variety you have not found yet as a silhouette.

Reading a young koi

A young koi does not show you what it will become. It shows you a range, and the younger the fish, the wider the guess. Keep it, and it eats every day at your cost. Cull it, and you may have thrown away the best fish in the building.

Water is the constraint

Every tank runs on the same three pressures:
  • Oxygen has a corridor. Too little suffocates, too much causes gas bubble disease, and aeration costs you by the kilowatt-hour.
  • Ammonia climbs when you overfeed. Filters clog, and you pull them, rinse them at the sink and put them back yourself.
  • Temperature separates your species. Warm for koi, cold for trout.
Stock more fish and you earn more, until the water flips.

Four ways to sell

  • Customer orders arrive as email on the farm PC, including stocking orders from angling clubs. Accept a price and a pickup date, net the fish and get them to the loading bay on time. Miss a date and you pay twice: in money and in reputation.
  • Aquamart24 is your online market. You set the price, bag the fish at the oxygen cylinder and ship them.
  • The farm shop sells what you process. Work the processing station, stock the cold room and the counter, serve walk-in customers and sell your caviar.
  • The show hall is a conversation. Point out what is genuinely good about a koi, haggle face to face and keep the glass clean, because dirty glass keeps visitors away.

A farm that keeps running

Build tanks as a shell, mount the equipment and fill them from the tap. Harvest ponds with the seine net, add automatic feeders, and hire a counter clerk and a koi advisor when one pair of hands is no longer enough. At the end of every day a settlement shows what the farm earned and why.

Also in the game

  • Day and night cycle, with pause and up to 10x speed
  • Difficulty levels, an optional assistant and a complete in-game manual
  • Seven languages: English, German, French, Spanish, Brazilian Portuguese, Simplified Chinese and Japanese
  • Co-op for up to four players, currently in testing

Developed by one person in Germany, with Godot 4.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Some of this game's assets were created with generative AI tools and then integrated by hand: the fish models, the facility hall, and the tanks. Some in-game text, the tutorial and the customer emails, was written with the help of an AI language model. All other assets (music, sound, icons, textures, remaining UI) are hand-made or CC0. Every game system, the water simulation, koi grading, economy, customer and calendar logic, is hand-written code. No generative AI runs at runtime; nothing is generated live while you play.

System Requirements

    Minimum:
    • OS: Windows 10 (64-bit)
    • Processor: Intel Core i5 (4 cores, ~2017 or newer) or equivalent AMD Ryzen 5
    • Graphics: Dedicated Vulkan-capable GPU with 4 GB VRAM (e.g. NVIDIA GTX 1060 / AMD RX 580). Integrated graphics are not officially supported yet.
    • Storage: 2 GB available space
    Recommended:
    • OS: Windows 11 (64-bit)
    • Processor: Current-generation Intel Core i5 or equivalent AMD Ryzen 5
    • Graphics: NVIDIA GTX 1660 / RTX 2060 or AMD RX 5600 XT, 6 GB VRAM
    • Storage: 2 GB available space