Quick answer

Fight the bosses in main-story order

The core sequence is Giant Piranha → Pufferfish → Terrorizing Bird / Albatross → Mutated Bowhead Whale. Each encounter gates a later area or ending objective, so collect the named progression drop before leaving and complete the related NPC hand-in.

Boss Progression

All major bosses in order

Use this list to identify your current encounter. Each card summarizes the fight without replacing the full strategy page.

01Early game · Water

Giant Piranha

The first major combat check. Keep the boat moving, control your distance, and avoid being trapped during its aggressive approaches.

Main threat
Fast rushes
Role
Progression boss
View fight guide
02Mid game · Water

Pufferfish

A timing fight built around its inflated state. Respect the dangerous phase and attack when the encounter gives you a safer opening.

Main threat
Inflated phase
Role
Island progression
View fight guide
03Late game · Air

Terrorizing Bird / Albatross

The fight shifts above the water. Track its approach, avoid committing during unsafe passes, and punish the openings between attacks.

Main threat
Aerial passes
Role
Military-area key
View fight guide
04Finale · Volcano

Mutated Bowhead Whale

The final story boss. Survive the arena, finish the mutated whale, and collect the Whale Fin needed to unlock the ending route.

Main threat
Arena pressure
Reward
Whale Fin
View fight guide

Before the fight

A short boss preparation checklist

Repair first

Do not enter a required encounter with a damaged boat if the fight takes place on open water.

Bring a reliable weapon

Consistency and safe range matter more than testing unfamiliar equipment during a progression fight.

Clear your inventory

Leave room for the named boss drop so it is easy to identify and carry back to the quest NPC.

Know the exit condition

A boss defeat may be followed by a pickup, hand-in, key, or vehicle interaction before progression completes.

Find your fight

Which boss are you stuck on?

FAQ

Boss guide questions

How many major bosses are covered here?

This first-version progression index covers four main encounters with dedicated guides: Giant Piranha, Pufferfish, Terrorizing Bird, and Mutated Bowhead Whale.

Can I fight the bosses out of order?

The site lists them in the main progression order because rewards and quest hand-ins lead into later islands and encounters.

Why did the story not advance after a boss died?

Search the arena for the named quest drop and return it to the relevant NPC. The defeat alone may not complete the progression step.

Where can I see the complete route?

Use the Full Walkthrough to follow every boss, island unlock, and ending objective in order.

First bossGiant PiranhaStart the boss progression route