Dark Brethren
Secret Waters
Discover a different way to descend.
Dutchman's Rest
See a sailor's worst nightmare with your own eyes.
Symphony Of Sorrow
Survive a fierce battle aboard a ship.
Dark Desires
Learn more about the Dark Brethren.
Ritual of Thieves
Overcome greed's fury before time runs out.
The Siren's Call
Discover all the hidden Siren Murals in the Coral Fortress.
Total Required: 5 times
Heart of a Thief
Peek at the contents of some private correspondence.
Lost at Sea
Discover all the hidden Journals in the Coral Fortress.
Total Required: 5 times
Fortress of Sorrow
Legendary Commendation: Complete all Commendations for 'Dark Brethren'.
Cosmetics Unlocked:
Pistol of Sunken Sorrow
Earn the 'Dark Brethren' Commendation.
Figurehead of Sunken Sorrow
Earn the 'Fortress of Sorrow' Commendation.