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