Ultima II: The Revenge of the Enchantress

From the game’s story, the player learns that the lover of the dark wizard Mondain, the enchantress Minax, is threatening Earth through disturbances in the space-time continuum. The player must guide a hero through time and the solar system in order to defeat her evil plot.

The young Minax survived her mentor’s and lover’s death at the hands of the Stranger (in Ultima I) and went into hiding. Several years later, Minax got older and very powerful, more so than Mondain once was. Minax wanted to avenge the death of her lover, so she used the time doors created by Mondain’s defeat to travel to the Time of Legends, a place located at the origin of times. From there, she sent her evil minions to all the different time eras; she also used her dark powers to disturb the fabric of time and influence men, who ultimately destroyed each other in the far future, nearly wiping out humanity.

Lord British called for a hero to crush Minax’s evil plans. The Stranger once again answered British’s call. The game begins with the Stranger starting his quest to defeat Minax. Minax’s castle, named Shadow Guard, can only be reached through time doors (similar to moongates in the later games); even then an enchanted ring is required to pass through the force fields inside. The hero hunts down the sorceress to the Time of Legends, pursues her as she teleports throughout the castle, and destroys her with the quicksword Enilno.

Source: TheGamesDB