Here is the full list of all 8 Prayer of the Faithless achievements.
Try to change yourself for the better. Whether you succeed or not is anyone's guess.
Rise to the highest seat in the land, crushing everything that stood in your way.
Locked the most dangerous people out of society.
Stop pretending to be someone you're not.
Cleared the game without any party members falling in battle
Reach the level cap
Hit an enemy for 0 damage
SP damage reduction enabled you to survive an attack that would have otherwise killed you