Here is the full list of all 18 Choice of the Pirate achievements.
Acquire three ships to launch your fleet.
Will those mutineers get what's coming to them?
Fall under the curse of the ghost ship. Congratulations on your zombification!
Become a spy for the Crown.
Turn over your first bounty to the Crown.
Become the Pirate King.
Defeat the Lusca.
Steer the Crown in the wrong direction.
Steal from the Pirate King! You've got guts, Captain.
Rescue a mermaid.
Defeat the ghost ship.
Earn the notice of El Sabio.
Capture your first target without sinking it.
Convince Evan Lark to open up to you.
Acquire two ships to launch your fleet.
Acquire one ship to launch your fleet.
Remove the threat of Blackguard from your future.
Save Jim the Cabin Boy from an untimely death.