Please sign up or login to post guides or tips for this achievement.
(User Removed)
posted the following guide:
This achievement unlocks after changing your relationship with 20 NPCs to Friends.
This must be done before becoming the ruler of Albion, as afterwards, everyone is your friend and the achievement's counter will reset to zero at every friend made, making this achievement not possible on this save anymore. (Possibly playing Co-op with someone will allow you to get this achievement in that case.)