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