How to Fish Weapons & Upgrade Priority Guide

Stage	Purchase direction	Why it pays now	Common mistake
Opening	Any available dependable starter weapon	Finishing catches and surviving Spider Crab matter before luxury upgrades; the Pistol is listed for Forest Island.	Spending every coin on a rod while lacking damage.
Forest	Balanced close/mid-range damage	Giant Piranha is easier when missed attacks can be punished quickly.	Carrying quest pickups in a full inventory.
Desert	Reliable sustained damage	Pufferfish and Blue Shark reward uptime more than a single stylish shot.	Confusing the optional grill route with the story route.
Rocks	Accurate rifle or sniper setup	Albatross spends time at range and killscore challenges benefit from accuracy.	Selling the Tuna body for short-term cash.
Volcano	Fully upgraded primary plus food reserves	The whale chain is longer and punishes low ammunition or recovery.	Starting the trigger without room to preserve key bodies.

Stage

Purchase direction

Why it pays now

Common mistake

Opening

Any available dependable starter weapon

Finishing catches and surviving Spider Crab matter before luxury upgrades; the Pistol is listed for Forest Island.

Spending every coin on a rod while lacking damage.

Forest

Balanced close/mid-range damage

Giant Piranha is easier when missed attacks can be punished quickly.

Carrying quest pickups in a full inventory.

Desert

Reliable sustained damage

Pufferfish and Blue Shark reward uptime more than a single stylish shot.

Confusing the optional grill route with the story route.

Rocks

Accurate rifle or sniper setup

Albatross spends time at range and killscore challenges benefit from accuracy.

Selling the Tuna body for short-term cash.

Volcano

Fully upgraded primary plus food reserves

The whale chain is longer and punishes low ammunition or recovery.

Starting the trigger without room to preserve key bodies.

Attachment priorities

Upgrade the job, not the spreadsheet

Base damage is only one part of a useful weapon. Range, shot cadence, spread, ammunition economy and the specific achievement attempt decide whether an upgrade changes the fight.

Make hits repeatable

Choose the weapon whose range and handling match the target. Close Shotgun spread, distant Sniper shots and sustained Assault Rifle pressure solve different misses.

Reach a useful damage breakpoint

Improve damage when it removes an extra attack cycle or makes the intended finisher reliable. Recheck after installing parts instead of assuming every upgrade scales identically.

Protect sustained attempts

Magazine and handling improvements matter most when a boss stays active long enough to punish reloads. A one-shot challenge values a different setup.

Finish one eligible firearm

For Fully equipped, place the required optic, damage part, muzzle, laser and extended magazine on the same weapon. Scattered attachments do not satisfy that checklist.

Three achievement-specific picks

360 no scope: weaken a predictable small target, then use a firearm you can center confidently without aiming down sights.
Easy: revisit an early boss with late-game damage and apply it immediately after the health bar appears.
Everyone's dream: Dynamite is the required tool; lead the Seagull and time the blast instead of treating it like a direct-hit firearm.

Weapons & upgrade priority

All 8 documented weapons

Pistol

Shotgun

Sniper Rifle

Assault Rifle

SMG / Uzi

Brass Knuckles

Knife

Dynamite

Buy for the encounter ahead

Upgrade the job, not the spreadsheet

Make hits repeatable

Reach a useful damage breakpoint

Protect sustained attempts

Finish one eligible firearm

Three achievement-specific picks