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Zork Nemesis (also known as 'Zork Nemesis: The Forbidden Lands) is a graphic adventure game developed by Zombie LLC, published by Activision, and released
Beyond Zork (full title: Beyond Zork: The Coconut of Quendor) is an interactive fiction computer game written by Brian Moriarty and released by Infocom
Zork: Grand Inquisitor is a graphic adventure game developed and published by Activision, and released for Windows in 1997; a second edition for Macintosh