Fish Idle 2: Underwater Mystery
Released Nov 2024
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!
65% positive · 1,630 reviews
Done
All announced content has been released
Medium confidence
Done
All announced content has been released
Medium confidence
Where to get it
Free on Steam
Evaluation
Fish Idle 2: Underwater Mystery launched on November 15, 2024 as a free-to-play idle fishing arcade game. In the weeks following launch, the developer shipped a feature patch on November 19, 2024 adding UI improvements, localization, and bug fixes. The only DLC on record — a "Welcome Pack" — was released on March 1, 2025. The 12 developer news posts scanned include one major content release, two announcements, one development status post, several feature patches, and bug fixes, but the most recent visible post dates to shortly after launch. There is no unreleased DLC on the store, no announced future content, no roadmap, and no developer statement indicating further updates are planned. The game's store description and short description describe a complete product with no language suggesting ongoing seasons, expansions, or live-service content cycles. With no outstanding commitments, no sustained post-launch cadence of major content drops extending into 2025 or 2026, and no developer communications indicating more is coming, the game appears to have launched as a finished product with one small DLC added in early 2025.
Evidence
Welcome Pack DLC released on March 1, 2025 — the only DLC on the store, and it has shipped.
Feature patch released shortly after launch adding UI improvements, localization for four languages, chest timer fixes, and other bug fixes.
Content
1 of 1 released · no outstanding content
Media
Details
Developer
Publisher
MulticastGames
Achievements
30
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player
About this game
Crush in your rainboots and hop into your boat! We are going fishing in Fish Idle 2: Underwater Mystery, a unique idle fishing arcade featuring smooth graphics and intuitive mechanics. We have no time to swing a fishing rod, so let’s streamline the process!
Let’s start with the basics. It’s all about automation: fish start biting as soon as you approach them, and resource indicators keep you informed while you focus on managing your Fish Kingdom effectively. The game offers advantageous upgrades to enhance your idle fishing abilities, helping you become a true fish tycoon. You’ll still need to steer your boat to chase fish schools and avoid obstacles, so don’t get too distracted by your economic prowess!
Once your hull is full, it’s time to get upgraded! Improvements in fishing speed let you catch more and rarer species, while increased storage capacity allows you to hold more catches in your boat. Boost your boat’s speed and defense for impact protection, and enhance your fishing rods to cast multiple lines at once. It’s all about maximizing your gains in the most efficient way, so you’ll have to use your head to figure out the best way to success!
Just like in real life, becoming a fish tycoon involves various ways to profit from your catches. The Idle Fish Farm allows you to invest and get passive income, while the Black Market lets you upgrade your Fish Kingdoms beyond OSHA standards. The Bots Shop enables you to hire hunter, fisher, and cargo ships to fish and deliver catch for you, boosting your income. If day trading is your thing, there is a Currency Exchange that has some special benefits. Tax fraud is not a crime, it’s an obligation if you want to make it big.
Get ready to dive into the Fish Kingdoms and become the ultimate fish tycoon in Fish Idle 2: Underwater Mystery!
SIMPLE AND EASY FISHING
Let’s start with the basics. It’s all about automation: fish start biting as soon as you approach them, and resource indicators keep you informed while you focus on managing your Fish Kingdom effectively. The game offers advantageous upgrades to enhance your idle fishing abilities, helping you become a true fish tycoon. You’ll still need to steer your boat to chase fish schools and avoid obstacles, so don’t get too distracted by your economic prowess!
UPGRADE YOUR FISH KINGDOM
Once your hull is full, it’s time to get upgraded! Improvements in fishing speed let you catch more and rarer species, while increased storage capacity allows you to hold more catches in your boat. Boost your boat’s speed and defense for impact protection, and enhance your fishing rods to cast multiple lines at once. It’s all about maximizing your gains in the most efficient way, so you’ll have to use your head to figure out the best way to success!
MAKE IT BIG
Just like in real life, becoming a fish tycoon involves various ways to profit from your catches. The Idle Fish Farm allows you to invest and get passive income, while the Black Market lets you upgrade your Fish Kingdoms beyond OSHA standards. The Bots Shop enables you to hire hunter, fisher, and cargo ships to fish and deliver catch for you, boosting your income. If day trading is your thing, there is a Currency Exchange that has some special benefits. Tax fraud is not a crime, it’s an obligation if you want to make it big.
NOW GO FISH
Get ready to dive into the Fish Kingdoms and become the ultimate fish tycoon in Fish Idle 2: Underwater Mystery!
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Last evaluated Jun 19, 2026
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