Here is the full list of all 43 Choice of the Petal Throne achievements.
Perish in service to your heir.
Rest in the heaven of your god or goddess.
Take an eye for an eye.
Learn of the past and the Tree of Time.
Honor your arranged marriage.
Fight a duel.
Return home victorious.
Give a great sacrifice to a god or goddess.
Inspire great loyalty.
Help a family member in need.
Complete both Family First achievements.
Win the battle of Sangmiré.
Take Sangmiré by subterfuge.
Escape your arranged marriage.
Refuse an unjust marriage.
Help a family member out of hot water.
Pay shámtla to settle a murder.
Make a big mistake.
Romance priests of Dlámelish.
Fail a lover.
Prove yourself able to lead soldiers.
Challenge any who insult the honor of your legion.
Fight upon the officers' platform at Sangmiré.
Fight in the line at Sangmiré.
Prove a strong ally in battle.
Anger your superior.
Get court-marshaled.
Lose the battle at Sangmiré.
Talk your way out of imprisonment.
Get help from an unexpected source.
Resurrect a companion.
Fight a legendary monster in single combat.
Visit the capital.
See the world.
Bring your family safe through war.
Be banished to the hell of your god or goddess.
Keep Heréksa Rayána alive.
Turn the other cheek.
Marry your clan-cousin, Wave.
Marry your second-in-command, Rayána, despite her low birth.
Marry your fellow kási, Nirún.
Marry Wave, Rayána, and Nirún.