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