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