The Way of Life Add-on for Crusader Kings II has 10 achievements.
Build an Observatory
Successfully establish a trade route
Kill your prey in the Epic Hunt
Successfully seduce 10 people by targeted seduction with one character
Successfully slander 20 people with one character
Have 6 close family members as friends
Win 7 duels with one character
Gain the Legendary Wisdom modifier
Gain the Hedonist trait through carousing
Gain the Theologian trait