The Way of Life Add-on for Crusader Kings II has 10 achievements.
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
Successfully establish a trade route
Win 7 duels with one character
Gain the Legendary Wisdom modifier
Gain the Hedonist trait through carousing
Build an Observatory
Gain the Theologian trait