No missable achievements (plus 19 unknown)
Sign in with Steam or Xbox to track your progress, and:
Reform the church.
Get an evaluation of your rulership.
Get a suit of gold.
Have a swashbuckling adventure.
Meet the leader of a distant land.
Play an anachronistic song.
Ride a horse.
Marry a princess.
Meet your rival at the summit.
Outspend your rival at the summit.
Fill your chamber with spouses.
Marry an inanimate object.
Get a suit of gold for a monkey.
Fill your jail with prisoners.
Make your rival cry.