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