Fish Idle 2: Underwater Mystery Equipment Guide: Best Equipment Ranked

Q: Is Fish Idle 2 free?

Yes, it is free to play on Steam, released on November 15, 2024 by Multicast. There is a separate free Prologue: Fish idle 2 and a paid Welcome Pack DLC.

Q: Do you play actively or does it idle for you?

Both. You steer the boat toward schools during active play, while the Idle Fish Farm and hired bots keep earning when you are away. Progression assumes you use both halves.

Q: What should you upgrade first?

Fishing speed and hauling capacity, then bots. Reaching the point where catching and delivering happen without you is worth more than any single stat increase you can buy early.

Q: Is there combat?

There are hazards and boss encounters, which is why boat defence and attack power exist as upgrade lines. It is not a combat game, but you cannot ignore those stats when pushing into new waters.

Q: How long does it take to finish?

There is no fixed ending. The game carries 30 Steam achievements and progression continues through the Fish Kingdoms, the winter biome and the market systems, so completion is measured in achievements rather than a credits roll.

Complete Fish Idle 2: Underwater Mystery equipment guide. Every equipment option ranked with stats, best builds, and how to get them.

EarlyGuides Editorial Team

Researched and editorially reviewed. Updated August 12, 2026.

Fish Idle 2: Underwater Mystery is a free to play idle fishing arcade from Multicast, released on Steam on November 15, 2024 with 30 achievements. You steer a boat toward schools of fish that bite automatically on approach, sell the catch, and pour the profit into upgrades and passive income. Steam reviews sit at Mixed, and the actual depth lives in the economy screens rather than in the fishing.

Your choice of equipment defines your damage output and playstyle. This guide ranks every major option, explains what makes each one strong, and tells you which builds they pair best with.

Equipment Rankings

Equipment	Tier	Best For	Notes
Fishing speed	S	Early progression, where catch rate is the direct limit on your income.	Raises how quickly fish are landed once they bite and gates access to rarer species.
Storage capacity	A	Cutting round trips once catch rate has outgrown the size of your hold.	Increases the maximum weight the boat carries before you have to return and sell.
Boat speed	A	Long routes and any point where travel eats more of the session than fishing does.	Cuts travel time between schools and back to the seller.
Boat defence	B	Boss encounters and pushing into new waters ahead of your income curve.	Survivability against hazards and boss encounters.
Multi-line fishing rod	B	The mid game, where a multiplier is worth more than another tier on a single stat.	Multi line rods hook more than one fish at a time, multiplying catch rate rather than adding a flat amount to it.

S-Tier: Fishing speed

Raises how quickly fish are landed once they bite and gates access to rarer species. It is the closest thing the game has to a damage stat.

Attribute	Detail
Tier	S
Best For	Early progression, where catch rate is the direct limit on your income.
Key Mechanic	Automatic fishing on approach
Recommended Build	Active steerer

How to get it: Available from mid-game onward. See our walkthrough for the exact progression point.

Best builds using Fishing speed: Pairs naturally with Active steerer thanks to how their stat scaling lines up.

A-Tier: Storage capacity

Increases the maximum weight the boat carries before you have to return and sell. Every trip back to sell is time not spent fishing.

Attribute	Detail
Tier	A
Best For	Cutting round trips once catch rate has outgrown the size of your hold.
Key Mechanic	Boat steering and obstacles
Recommended Build	Idle farm investor

How to get it: Accessible in the early-to-mid game. Check our maps guide for the location.

Best builds using Storage capacity: Pairs naturally with Idle farm investor thanks to how their stat scaling lines up.

A-Tier: Boat speed

Cuts travel time between schools and back to the seller. Its value scales with distance, so it matters more the further out you push.

Attribute	Detail
Tier	A
Best For	Long routes and any point where travel eats more of the session than fishing does.
Key Mechanic	Idle Fish Farm
Recommended Build	Bot fleet operator

How to get it: Accessible in the early-to-mid game. Check our maps guide for the location.

Best builds using Boat speed: Pairs naturally with Bot fleet operator thanks to how their stat scaling lines up.

B-Tier: Boat defence

Survivability against hazards and boss encounters. Neglect it and a boss fight becomes a stalemate you cannot finish.

Attribute	Detail
Tier	B
Best For	Boss encounters and pushing into new waters ahead of your income curve.
Key Mechanic	Bots Shop
Recommended Build	Market trader

How to get it: Found in later areas. Our walkthrough covers when you can access this.

Best builds using Boat defence: Pairs naturally with Market trader thanks to how their stat scaling lines up.

B-Tier: Multi-line fishing rod

Multi line rods hook more than one fish at a time, multiplying catch rate rather than adding a flat amount to it.

Attribute	Detail
Tier	B
Best For	The mid game, where a multiplier is worth more than another tier on a single stat.
Key Mechanic	Currency Exchange
Recommended Build	Upgrade rusher

How to get it: Found in later areas. Our walkthrough covers when you can access this.

Best builds using Multi-line fishing rod: Pairs naturally with Upgrade rusher thanks to how their stat scaling lines up.

Equipment Progression Path

The order you should acquire equipment as you progress:

Starting gear → Enough to clear Starting lighthouse waters
Storage capacity → Your first real upgrade, available early
Boat speed → Mid-game upgrade with good scaling
Fishing speed → Best-in-slot, aim for this by late game
Upgrade to max → The power spike from max upgrades is enormous

Equipment Tips

Always upgrade your primary equipment before diversifying. One strong option beats three mediocre ones.
Match your equipment to your build's stat priorities for maximum scaling.
The first goal is automation, not income. Everything gets easier once bots and the Idle Fish Farm earn while you are not steering, so prioritise the upgrades that remove you from the loop over the ones that make you personally faster.
Check our tier list for how equipment rankings affect overall build effectiveness.

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