Ultima IV: Quest of the Avatar

Ultima IV: Quest of the Avatar is a 1985 role-playing video game designed by Richard Garriott and published by Origin Systems, the fourth instalment in the Ultima series. Departing from the typical "defeat the dark lord" structure, the game asks the player to embody the eight Virtues and become the Avatar -- a moral exemplar for the people of Britannia. Widely regarded as one of the most important RPGs ever made, it broke new ground in role-playing storytelling and ethical design (Wikipedia)