Prologue: Fish idle 2
Released Aug 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!
64% positive · 377 reviews
Done
All announced content has been released
High confidence
Done
All announced content has been released
High confidence
Where to get it
Free on Steam
Evaluation
Prologue: Fish Idle 2 is explicitly described in the store as a free "prologue" version — a standalone promotional demo for the full game, Fish Idle 2: Underwater Mystery. As a prologue/demo, it launched on August 2, 2024 as a complete, self-contained package by design.
After launch, the developer posted four updates between August 5–19, 2024, all focused on bug fixes, technical issue resolution, and quality-of-life improvements (Steam Deck support, visual fixes, control adjustments). The last developer communication was on August 19, 2024. There have been no developer posts of any kind since that date, and no major content updates, expansion announcements, or roadmaps have ever been published for this title.
Given that this is a free promotional prologue rather than a game intended to receive ongoing content, and that all post-launch activity was limited to launch-window bug fixing that concluded by August 19, 2024, the game is complete as originally designed. No future content has been announced or implied for this prologue specifically.
Evidence
Store description explicitly identifies this as 'a free introduction version to Fish Idle 2: Underwater Mystery' — a promotional prologue/demo, not a game designed to receive ongoing content updates.
Last developer post: a feature patch adding Steam Deck support, VSync, visual fixes, and control improvements. No future content mentioned.
Media
Details
Developer
Publisher
MulticastGames
Achievements
3
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player
About this game
Prologue: Fish idle 2 is a free introduction version to Fish Idle 2: Underwater Mystery!
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!
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!
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!
Are these done yet?
Last evaluated Jun 20, 2026
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