Here is the full list of all 31 SUNLESS SKIES achievements.
Launch a successful expedition into the Graveyard of Stars.
Anger all the sky-gods at once.
Become a valued agent of the Windward Company.
Chart all the ports in the Blue Kingdom.
Visit all four regions with a single captain.
Retire to a life of fame, having written the Song of the Sky.
Learn the Unassailable Founder's secret.
Retire to a grand mansion with a hoard to make a dragon envious.
Advance a captain to level 20.
Chart all the ports in Albion.
Chart all the ports in Eleutheria.
Decide the fate of Percy Blythe.
Complete the Boatman's journey.
Return from a Weft of Unravelling Time.
Appoint a full complement of officers, including a Mascot.
Resolve Captain Whitlock's Legacy.
Become a hero to the Tacketies.
Upset the balance of power in the Reach.
Pass your locomotive to a new captain in your lineage.
Chart all the ports in the Reach.
Learn the secret that the stars hide, and find a way it won't kill you.
Complete the quest for the Martyr-King's Cup.
Be consumed by your nightmares.
Succumb to your terror.
Have all the following scouts and mascots aboard at once: the Inadvisably Big Dog, the Perfect Pangolin, the Useless Cat, the Diffident Bat, the Star-Smitten Bat, the Intrepid Cavey and the Ratronaut.
Restore the Clockwork Sun to its strength and its glory.
Continue a lineage to its seventh captain.
Have 0 Crew, 0 Fuel, 0 Supplies, and Terror of 90 or more.
Possess a soul devoid of redeeming qualities.
Fly your locomotive beyond Death's Door and there meet your end.
Hatch and adopt a certain lovable scamp, even if he keeps stealing your crew's fingers and toes.