Here is the full list of all 19 The Sea Will Claim Everything achievements.
Guide Sunsquid back to the Electric Continent.
Have some tsipouro.
Discover the meaning of the ancient phrase.
Did you make a cookie for the thoughtful lizard?
Reject Lord Urizen's dogma.
Help the people of the Isle of the Moon.
A smelly old achievement found in a box.
Heal Underhome.
Help the people of the Isle of the Sun.
The mouse had achievements before everyone else did.
Gather all the Tokens of the Tomb of the Timber Tyrant.
Derek knew everything about alchemy, too... or so he thought.
Help the people of the Isle of the Stars.
Frubble frubble frubble frubble.
Help Niamh with her research so she can go back home.
This achievement contains tofu.
A bit of code The Mysterious-Druid accidentally left in the window's code gives you an achievement when pressing W.
Find all 700 collectibles!
Set sail to explore the Fortunate Isles. You're not sure what ahoy means, but it sounds nautical.