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