''Zyll'' was a pioneering text-based game written for the IBM PC Jr. and released in 1984. It was written by Marshal Linder and Scott Edwards, two IBM employees, and marketed as an adventure game.

The story begins in the "Land of Magic and Enchantment" where a young man named Zyll was unsuccessfully attempting to become a master of black magic. His ultimate goal was to become "Ruler of the Realm", an ambition for which he was eventually banished. After banishment, Zyll accidentally discovered the magical "Black Orb" upon throwing a failed potion to the ground. The ancient texts said that anyone possessing the Black Orb would become more powerful than all of the other sorcerers.

Zyll used his new found powers to take revenge against the Land of Magic and Enchantment by stealing the "Great Treasures" that had been hidden in secret vaults for many years. He eventually turned the once prosperous country into a dark and barren wasteland.

Players are given the role of a daring adventurer who has decided to steal the Black Orb from Zyll in order to return the Land of Magic and Enchantment to its previous splendor. Upon obtaining the Black Orb, the player must collect at least four of the stolen Great Treasures in order to be instantly transported to the Land of Magic and Enchantment. Game-play begins with the player being transported to Zyll's home, the Castle Mitain.

!!This VideoGame contains examples of:
* AmbitionIsEvil: This is what got Zyll into trouble in the first place.
* AntagonistTitle: Well, you're trying to steal the Black Orb from Zyll.
* FisherKing
* OneWordTitle: It's an AntagonistTitle. You're trying to steal the Black Orb from Zyll.
* RoaringRampageOfRevenge: Zyll didn't hesitate to embark on this once he discovered the Black Orb.