Full list of all 54 Sunless Sea achievements.
The base game contains 30 achievements, and there is 1 DLC pack containing 24 achievements.
Take the Salvager legacy
Complete the game without saving manually
Suffer Storm's Curse
Acquire the Eschatologue-class Dreadnaught
Suffer Salt's Curse
Take the Rival legacy
Take the Pupil legacy
Download new stories
Let your terror reach 100
Visit the Surface
Send your child to zee
Let your terror reach 90
Spend one year out at zee in an unbroken lineage
Create an ironclad will
Achieve Antiquarian 10
Achieve Admiralty's Favour 10
Discover The Dawn Machine
Discover 'The Eye'
Woo a sweetheart in London
See Hunter's Keep burn
Take the Shipmate legacy
Die for the first time
Die 5 times in an unbroken lineage
Die 10 times in an unbroken lineage
Spend five years out at zee in an unbroken lineage
Spend ten years out at zee in an unbroken lineage
Suffer Stone's Curse
Recruit the imaginary officer
Take the Correspondent legacy
Complete the game without ever choosing a past
Perform an abyssal ritual to encounter Lady Black
Discover Nook
Discover Wrack
Discover Rosegate
Discover Aigul
Come face to face with the Constant Companion
Discover Undercrow
Discover The Gant Pole
Discover Hideaway
Discover Anthe
Accept a power of the deep zee
Discover Scrimshander
Discover Dahut
Discover Low Barnet
Use an oasis to increase your oxygen levels
Escape underwater combat by resurfacing
Use underwater currents to bear you on your way
Venture beneath the waves
Die of suffocation
Be killed by an underwater creature
Be killed by the Constant Companion
Avoid being killed by the Unexploded Unclear Bomb
Complete the Zubmariner ambition
Collect all of Drownie Love-song, Drownie Counterpoint and Drownie Hymn