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