Steam app 1518810 · updated 12 Sep 2026, 23:03 UTC
A koi breeding game.
220 hourly samples, with the daily peak drawn over them. Weekends are shaded.
68 months, February 2021 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
26 days as the curve, each the highest figure that day. Behind it, 103 hourly samples from 18 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 116 hourly samples. Each dip is a night. Weekends are shaded.
Koi Farm was released on 26 Feb, 2021.
| Language | Full audio |
|---|---|
| English | ● |
| Dutch | ● |
| Polish | ● |
| Turkish | ● |
| French | ● |
| German | ● |
| Japanese | ● |
| Spanish - Spain | ● |
| Portuguese - Portugal | ● |
| Portuguese - Brazil | ● |
| Spanish - Latin America | ● |
| Simplified Chinese | ● |
| Russian | ● |
| Ukrainian | ● |
| Italian | ● |
| Korean | ● |
| Filipino | ● |
| Indonesian | ● |
| Serbian | ● |
A blank audio cell means full audio was not marked in the returned language list.
27 developer announcements, Feb 2021 to Apr 2025 · times in UTC
Dear koi farmers, Todays update improves the koi schooling behavior. Koi now group based on their color, which makes it easier to tell different breeds apart while they're swimming. These screenshots show the improvement: the koi in the…
SchnautziDear koi farmers, To celebrate the Steam Farming Fest, koi farm is 40% off! The game has also received an update: When the book is open, a button appears that takes the player to the settings menu, so a keyboard is no longer needed to play.…
SchnautziDear koi farmers, Koi Farm has a website now! For now, the website contains links and some information about the game, but we have bigger plans for the future. Stay tuned! https://koifarmgame.com/
SchnautziDear koi farmers, I've just pushed a small patch that prevents the shift and control keys from remaining in the "pressed" state when tabbing out of the game. This caused koi to be teleported (shift + click and control + click behavior)…
Patch notesDear koi farmers, By popular request, Koi Farm now has two English language options, one with metric units and another one with imperial units.
Patch notesDear koi farmers, I've had several messages of Steam deck owners experiencing problems with touch controls. Sometimes, a region to the right and bottom of the screen can't receive input. While I'm trying to fix the issue, a user on our…
Patch notesDear koi farmers, A small patch has been published today: Some compatibility issues with Steam Deck and Linux were fixed. When changing settings that require reboots, the game automatically reboots back into the previously loaded save. If…
Patch notesDear koi farmers, The latest patch turns MSAA (soft edges) on by default, unless it is turned off in the menu. The patch also includes some compatibility fixes.
Patch notesDear koi farmers, To celebrate the Steam summer sale, we're hosting a koi breeding challenge in our official Discord server! We're giving away 2 months of Xbox Game Pass Ultimate to the creator of the prettiest fish. For more info, check…
SchnautziDear koi farmers, The game now has a menu option for toggling MSAA (anti aliasing). This feature was on by default, but it can now be turned off. This makes edges rougher, but the game will run smoother on slower computers.
Patch notesDear koi farmers, Koi farm has now been translated into Indonesian. The Indonesian option is accessible from the game menu.
Patch notesDear koi farmers, Koi farm has now been translated into Filipino. The Filipino option is accessible from the game menu.
Patch notesDear koi farmers, Koi farm has now been translated into Korean. The Korean option is accessible from the game menu.
Patch notesDear koi farmers, To celebrate the Steam winter sale, koi farm gets a special winter update today! During the winter sale, Koi Farm is 30% off, and the koi ponds are covered in snow.…
SchnautziDear koi farmers, Lightning flashes during thunderstorms can now be turned off by a menu setting, since they can be an issue for players with epilepsy. Thunderstorms still occur when flashes are turned off, but there will not be any…
Patch notesDear koi farmers, To celebrate the Halloween sale, koi farm gets a special update today! The most visible change is the autumn theme that will be active during the Halloween sale…
SchnautziDear koi farmers, A small patch has been published today: A white or black screen crash has been fixed. Some users encountered crashes where the screen turned black or white, but the sounds kept playing. Implemented new systems in…
Patch notesDear koi farmers, A small patch has been published today: Color mutation probabilities have been rebalanced.
Patch notesDear koi farmers, By popular request, I've added more empty pages to the card book. When all challenges have been completed, the book has 30 empty pages available that can be used to store any koi. Time to clean up those crowded ponds!
Patch notesDear koi farmers, By popular request, Koi Farm now supports three save slots, so three totally different koi ponds can be created. Existing saves will automatically become pond #1, and ponds #2 and #3 will become available as new save…
SchnautziDear koi farmers, Thanks to feedback and contributions to the source code, I've been able to release another small patch with fixes and improvements: Added Italian translations. Added a link to the Discord sever to the main menu. Adding…
Patch notesDear koi farmers, It's time for another small patch, fixing the broken steam overlay among other things: Steam overlay now works. Fixed an issue where enter toggled full screen mode, this should have been alt + enter. Fixed a bug where menu…
Patch notesDear koi farmers, Since the source code has been published, several players have already contributed small improvements and more translations. I have included them in this update. The following things have been changed since the last patch…
Patch notesDear koi farmers, As of today, the source code of Koi Farm is publicly available on GitHub. The game is written in HTML & JavaScript and it uses WebGL to render. Programmers who are familiar with these technologies should be able to work…
SchnautziDear Koi Farm players, By popular request, I've created an easy way to add new translations to the game. This public GitHub repository contains all language files that are currently in the game, and anyone can propose new translations…
SchnautziDear Koi Farm players, Thank you for playing! Since launch, several updates and patches have been applied already, in part thanks to all the feedback on the discord. Added Japanese translations. Added German translations. Added Turkish…
Patch notesKoi Farm has been released today! After fixing the last bugs and adding a few more colors and patterns, Koi Farm has finally been released! Koi Farm is a game about playing with koi ponds: you can crossbreed koi and combine interesting fish…
SchnautziWhat Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | KoiFarm.exe | --in-process-gpu --disable-direct-composition | windows 64 | |
| Launch | KoiFarm | --no-sandbox | linux 64 | |
| Launch | KoiFarm.app | --no-sandbox | macos |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
gameinstall | save | *.sav |
gameinstall | save | *.sav |
MacAppSupport | koifarm/save | *.sav |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG