Ultima V: Warriors of Destiny

After a century of relative peace, the Avatar of Virtue is summoned back to the medieval kingdom of Britannia to deal with a new threat: the usurper Lord Blackthorn, a formerly honorable noble who has been corrupted by strange new creatures called the Shadowlords. After the true king, Lord British, recently disappeared, the realm was placed under martial law. Blackthorn now rules the land, brutally imposing the eight virtues on the people of Britannia - and corrupting their meaning in the process. The Avatar must gather his former companions, turned outlaws by Blackthorn's regime, and set out to defeat the vile Shadowlords and bring the true king back from the shadowy depths of the underworld.