Store
New patch is live!
Hello, fishermans! Glad to announce new patch with bug fixes and game improvements Window screen mode and sound settings Now you can switch the game to window mode in game settings! Be sure to stretch window after switc…
Steam
Fish Idle 2: Underwater Mystery
Also known as Fish Idle 2: Underwater Mystery, fi2um, fish idle 2 underwater mystery
Dive into the most fun idle fishing arcade game! Manage your Fish Kingdoms with automated fishing, upgrade your boat and gear, invest in passive income, and outsmart the market. Become the ultimate fish tycoon!
Last update
24 May 2026
Original sources
1
Latest update
Latest updates
Update history
Browse past updates and patch notes for this game.
No updates match those filters.
New updates will show up here as they ship.
Gallery