Mystery House
| Mystery House | |
|---|---|
1982 re-release cover art | |
| Developer(s) | On-Line Systems |
| Publisher(s) | On-Line Systems |
| Designer(s) | Roberta Williams |
| Programmer(s) | Ken Williams |
| Series | Hi-Res Adventures |
| Engine | ADL |
| Platform(s) | Apple II |
| Release | May 5, 1980 |
| Genre(s) | Adventure |
| Mode(s) | Single-player |
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 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.