A complete overview of the different achievements and how to unlock them.
Characters
Gill Joins the Crew: Unlock Gill
Randomly obtained from a box when you land on gray tiles
Shelbie Joins the Crew: Unlock Shelbie
Clear one combat without firing cannons
Betty Joins the Crew: Unlock Betty
Unlocked when stunned 50 times
Krillstoph Joins the Crew: Unlock Krillstoph
Obtained where you get to choose a reward between two options. It is the tile with the double arrows pedestal icon
Finley Joins the Crew: Unlock Finley
Recycle the rewarded three planks into the Siren’s well after clearing the first chapter
Lotte Joins the Crew: Unlock Lotte
Complete a chapter without taking damage
Quill Joins the Crew: Unlock Quill
Complete a run
Cluck Joins the Crew: Unlock Cluck
Unlocked when all types of bird eggs are used once (Normal, Fire, Ice, Resonance, Oil and Explosive). To complete this achievement, you will need to purchase the Explosive Eagle and the Rainbow Peacock from the merchant Briny
Progression
It’s the Aquapocalypse: Complete the Tutorial
Shadow of the Undergrowth: Defeat Tentacles
Complete the first chapter
Tyrant of the Deep: Defeat Claws
Complete the second chapter
Harbinger of Hoarfrost: Defeat Heads
Complete the third chapter
Eye of the Storm: Defeat Eye
Complete the last chapter
Powder Fool: Destroy 100 sea monsters
Ship Gunner: Destroy 1000 sea monsters
Master-At-Arms: Destroy 10000 sea monsters
Reflector: Reflect two projectiles at once
Tendrils…: Buy your first upgrade
Curse Lifter: Lift a curse
Gold Plating: Max out a cannon
Level up a cannon to level 10
Old Sea Dog: Complete solo run
1 + 1 = 3: Complete co-op run
The Perfect Crew: Complete a run without taking damage
All the Treasures of the Sea: Buy all upgrades
You need to purchase every single items/upgrades from the four different NPCs in the The Great Lighthouse base
Deep Sea Duo DLC / Great Lighthouse Update (05/2023)
Hoarder: Complete a run while holding 20 trinkets using Jules
Let There Be Light: Hit 7 enemies with a single reflected projectile using Angus
Climate Change: Repel nearby storm using The Beacon
Clear the first level of the Lighthouse
Special Delivery: Fulfill a Siren’s request
Go to the tile with the orange bottle and use the harpoon to pick up the bottle floating in the sea right after the battle. Bring the item mentioned on the note to a Siren at the end of a chapter
Glass Cannon: Complete a run while having 3 Holy Artifacts still standing
You will need to get 3 Holy Artifacts by doing the same process as the Special Delivery achievement for each chapter and complete the run
Buried Treasures: Buy a scavenged item from Barnaby
Barnaby will give you a random item for 5 Tendrils at The Great Lighthouse base. Unlock this NPC by clearing level 7 of the Lighthouse
The Great Lighthouse: Unveil the mysteries of The Great Lighthouse
Clear every level of the Lighthouse
