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