Mystery House

Game Title: Hi-Res Adventure #1: Mystery House
Release Date: 05-05-1980
Release Number: 1
Series: Hi-Res Adventures
Next Game in Series: Hi-Res Adventure #2: The Wizard and the Princess
Designer: Roberta Williams

Description:  Mystery House is a four-color interactive fiction adventure game that places the player in a Victorian mansion with seven other people. As the player explores the mansion, he discovers that there is a killer murdering each guest one by one. The objective of the game is to figure out who the murderer is before the murderer finds you. Players explore and manipulate objects by typing in one or two-word phrases such as NORTH or GET KNIFE.  (From Mobygames description)

Alternate Releases:
Mystery House (Blue Sheet Release)
Mystery House (White Folder Release)
Mystery House (Black Box Release)