Screenshots
FISH OS
ORCO Games · Published by ORCO Games · Official site ↗
Last updated 28 Sept 2026
An idle fishing game that lives inside a fake 1997 operating system. Click the water to fish, then run your catch through a desktop where every window is a mechanic: an aquarium that buffs your income, a fish market, a fleet you send out overnight. 250 species. Solitaire included.
Indie · 2026 · More free games
About this game
FISH.OS. THE OPERATING SYSTEM FOR PEOPLE WHO FISH.
FISH.OS is an idle fishing game built inside a fake operating system from 1997. You fish, sell the catch, upgrade the gear, buy boats that work while you're gone, and reset the whole thing for a multiplier when the numbers stop meaning anything.
It also comes with a card game, a paint program, and a music player, because that's what shipped on discs back then.
The desktop is the game
Every system is a window. Open the fishing app, drag it where you want it, and leave the market running next to it while the aquarium bubbles away behind both. Arrange the workspace however you like, or minimize the whole operating system, the fish keep biting either way.
250 species to catch
Each fish is a pixel-art entry in the Fishpedia, sorted by rarity and by the zone it lives in. Commons fill the log quickly; the rare tiers take real time. Fuse duplicates to create hybrids, display your best catches in an aquarium you decorate yourself, and grind the completion percentage up one decimal at a time.
It earns while it's closed
Buy boats and send them on expeditions. Come back the next day to a full balance and a report on everything the fleet brought in overnight. Offline progress is the core of the game, not a late-game unlock, and it isn't rented, boosted, or sold back to you.
Prestige and rebuild
Formatting the drive wipes your progress and returns a permanent multiplier. Build better rods in the workshop, crack rocks for materials in the lab, unlock new fishing zones, and earn titles as you go. Each run gets you deeper than the last.
Software that has no business being here
Solitaire. FishSweeper. Fish 2048. A paint program with layers. TunaPlayer, for music. Desktop themes, a screensaver, and a seagull. They are all real, and they are all installed.
SYSTEM READY
Catch 250 species across unlockable zones
Run an economy of boats, upgrades, and offline expeditions
Prestige for permanent multipliers and deeper runs
Decorate an aquarium and fill out the Fishpedia
Play the bundled 90s software, all of it functional
Fully offline - no account, no server, no daily login
Steam achievements
FISH.OS is compatible with your afternoon.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit (version 1809 or later)
- Processor: 64-bit dual core, 2.0 GHz
- Memory: 4 GB RAM
- Graphics: Integrated graphics with DirectX 11 support
- Storage: 1 GB available space
- Sound Card: Having sound is a nice perk but you can play on mute
- Additional Notes: No internet connection required to play.
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 11 64-bit
- Processor: Any modern 64-bit processor
- Memory: 8 GB RAM
- Graphics: Any dedicated or modern integrated GPU
- Sound Card: Having sound is a nice perk but you can play on mute
- Additional Notes: No internet connection required to play.
