Here is the full list of all 33 Mythic Ocean achievements.
Witness the Panopticon ending.
Collect 18 Pages.
Meet 50 NPCs.
Ride the whirlpools in the Kelp Forest 5 times.
Witness The Scourge ending.
Witness an ending in which the gods go to war.
Help the creatures trapped in the Breach find a way home.
Collect 9 Pages.
Talk to Tuff about what's been following them.
Meet 25 NPCs.
Witness Lord Poison's inaugural concert.
Find out what's behind that metal gate in the Kelp Forest.
Finish 1 Fable.
DID YOU REMEMBER THE RULE??
Hear Rosetta's thoughts on the world's pleasant melodies.
Hear Rosetta's thoughts on the world's conflicting melodies.
Hear from Flip about everyone trying their new routine.
Deliver Flip's special message for Pout.
Talk to Tuff about their impressive physique.
Hear from Zubin about their new perspective on life.
Huh. What happened to Frill?
Hear about Snap and Frill's new arrangement.
Witness the Endless Party ending.
Witness the Rainforest Reserve ending.
Witness the Storm of Despair ending.
Witness the Powers For All ending.
Witness The Collective ending.
Witness the Megacorp Universe ending.
Witness the Solarpunk Star System ending.
Witness an ending in which the gods try to reach a compromise.
Witness an ending in which the gods have no disagreements.
Spend 30 uninterrupted seconds in Lutra's pod.
Knock a beaker or tank out through the bottom of Alethea's lab.