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.
Resource management and crafting determine how quickly your power scales. This guide covers what to prioritize, where to farm, and how to avoid wasting resources on the wrong upgrades.
Crafting Priority List
The order you should invest resources:
| Priority | Target | Why |
|---|---|---|
| 1 | Primary equipment | Biggest damage increase per resource spent |
| 2 | Core build gear | Enables your build's key combinations |
| 3 | Defensive upgrades | Survivability for boss fights |
| 4 | Secondary equipment | Situational options for specific content |
| 5 | Consumables | Temporary boosts for hard content |
Resource Farming by Area
Starting lighthouse waters
Key resources: Starting currency, first upgrade tiers Farming efficiency: Low value per run, but safe and consistent
Focus on gathering materials for Storage capacity upgrades here. See our maps guide for detailed area layouts.
Fish Kingdoms
Key resources: Kingdom upgrades, income multipliers Farming efficiency: Good early-game farming spot
Focus on gathering materials for Storage capacity upgrades here. See our maps guide for detailed area layouts.
Idle Fish Farm
Key resources: Passive income, offline earnings Farming efficiency: Best mid-game farming, worth revisiting
Focus on gathering materials for Storage capacity upgrades here. See our maps guide for detailed area layouts.
Black Market
Key resources: Attack power, fishing speed upgrades Farming efficiency: High-value materials for late-game upgrades
This is where you farm materials for Fishing speed max upgrades. See our maps guide for detailed area layouts.
Winter waters
Key resources: Winter coins, winter market upgrades Farming efficiency: Best resources in the game, requires strong build
This is where you farm materials for Fishing speed max upgrades. See our maps guide for detailed area layouts.
Upgrade Path
Early Game (Starting lighthouse waters to Fish Kingdoms)
- Upgrade your starting equipment to functional level
- Craft basic defensive gear
- Save specialty materials, since you'll need them later
- Focus on Storage capacity once accessible
Mid Game (Idle Fish Farm)
- Push Storage capacity to mid-level upgrades
- Start collecting materials for Fishing speed
- Craft situational consumables for boss fights
- Upgrade build-specific gear pieces
Late Game (Black Market to Winter waters)
- Max out Fishing speed. This is your top priority
- Complete your build's core gear set
- Craft endgame consumables
- Optional: upgrade secondary equipment for variety
Crafting Mistakes to Avoid
- Spreading upgrades across multiple equipment: Focus one weapon to max before diversifying.
- Hoarding materials: Use them. The game provides enough if you farm efficiently.
- Upgrading the wrong gear: Check our builds guide before investing.
- Ignoring Idle Fish Farm farming: This area has the best resource-to-time ratio in mid-game.
- Crafting consumables too early: Save specialty materials for late-game recipes.
Resource Efficiency Tips
- 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.
- Farm Idle Fish Farm during mid-game for the best return on time
- Check the walkthrough to know when each resource becomes available
- Match your farming route to your build. Some classes farm faster in certain areas
More Fish Idle 2: Underwater Mystery Guides
- Fish Idle 2: Underwater Mystery Fish Idle 2: Underwater Mystery Overview
- Fish Idle 2: Underwater Mystery Best Builds
- Fish Idle 2: Underwater Mystery Tier List
- Fish Idle 2: Underwater Mystery Walkthrough
- Fish Idle 2: Underwater Mystery Beginner's Guide
- Fish Idle 2: Underwater Mystery Tips & Tricks
- Fish Idle 2: Underwater Mystery Weapons Guide
- Fish Idle 2: Underwater Mystery Combat Guide
- Fish Idle 2: Underwater Mystery Boss Guide
- Fish Idle 2: Underwater Mystery Maps & Locations
- Fish Idle 2: Underwater Mystery Classes & Characters
Similar Games
If you enjoy Fish Idle 2: Underwater Mystery, check out these related guides:
- Stardew Valley Crafting Guide: simulation game with similar mechanics
- Satisfactory Crafting Guide: simulation game with similar mechanics
- The Sims 4 Crafting Guide: simulation game with similar mechanics
