Here is the full list of all 21 Even the Ocean achievements.
Visit the Library.
Visit the Art Institute of Whiteforge.
Finished Act 1.
Finished Act 2.
Finished Act 3.
Finished Act 4
Finished Act 5
Finish the game in under 5 hours.
Finish the game in Gauntlet Mode under 3 hours.
Finish Act 1 in Story Mode.
Use the Journal.
Finish Act 1 in Gauntlet Mode.