Mystery House
1980 · Sierra Entertainment
Mystery House is an adventure game released by On-Line Systems on May 5, 1980. It was designed, written and illustrated by Roberta Williams, and programmed by Ken Williams for the Apple II. Mystery House is the first graphical adventure game and the first game produced by On-Line Systems, the company which would evolve into Sierra On-Line. It is one of the earliest horror video games. Synopsis from Wikipedia, CC BY-SA.
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Editions
The formats this game was pressed for. Years are the release for that platform where Wikidata records one — a blank year means the platform is documented but the date isn't.
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