Mystery House box art for Apple II
Mystery House screenshot 3 for Apple II
Mystery House title screen for Apple II
Mystery House logo for Apple II
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Mystery House

Mystery House

↗ 320%
(Apple II - US, Action & Adventure)
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Developed_By:
Ken & Roberta Willians
Published_By:
Sierra
Released On:
05 May 1980
This game is an historical piece of video gaming all by itself! Mystery House is an adventure game released by On-Line Systems in 1980. It was designed, written and illustrated by Roberta Williams and programmed by Ken Williams for the Apple II. Mystery House is the very 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. The game starts near an abandoned Victorian mansion. The player is soon locked inside the house with no other option than to explore. The mansion contains many interesting rooms and seven other people: Tom, a plumber; Sam, a mechanic; Sally, a seamstress; Dr. Green, a surgeon; Joe, a gravedigger; Bill, a butcher; and Daisy, a cook. Initially, the player has to search the house in order to find a hidden cache of jewels. However, terrible events start happening and dead bodies (of the other people) begin appearing. It becomes obvious that there is a murderer on the loose in the house, and the player must discover who it is or become the next victim.
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Prices as of 27 Sep 2026
Typical $599.99–$599.99 (last 90 days)
2025JulOct2026AprJul0100200300400500600012VolumeComplete: $599.99Loose: $64.99
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