Questron is a fantasy RPG computer game series produced by Strategic Simulations, Inc.
In Questron the player takes on the role of a young serf who tries to make a name for himself by traveling the realm in order to gain the power and experience necessary to defeat the wicked "Mantor", ruler of the "Land of Evil".
From Wikipedia:
In 1988 a sequel was made for the Apple IIGS, Commodore 64, IBM PC and Amiga computers. It featured similar gameplay to the original with improved graphics and features. This game's programming, artwork and rules are credited to Westwood Associates while the storyline and original design are credited to Quest Software. This game was also produced by Strategic Simulations, Inc.
The premise of this game is that the player's character has been sent back in time to defeat six "Mad Sorcerers" before they can create the "Book of Magic" featured in the original game.
Source: Wikipedia, Questron, available under the CC-BY-SA License.