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An early (late '70s) HP minicomputer text adventure game, this one begins with the player dropped off by a taxi outside the locked gate of an estate containing an eponymous mysterious mansion, at the end of an endless "hideous highway". The grounds are surrounded by dense and difficult-to-navigate (even with the assistance of obligatory magic words) woods. Can the player find a way into the cubic building (three floors of 3x3 rooms), treasure-hunting ensues, as well as solving a murder mystery -- if the player can avoid becoming another victim of the murderer! The clock is always running, and should the player dally, the mansion, along with its treasures, its host of resident NPCs, and the player itself, all are incinerated in a house fire sparked suspiciously (or, dare I say... mysteriously?) at the stroke of midnight.


Mystery Mansion Windows Potential inventory items, company, and a maze.
Mystery Mansion Windows Well, what goes around comes around.
Mystery Mansion Windows Time passes while I'm stumbling through the underbrush!
Mystery Mansion Windows Off the highway and into the woods

Promo Images

Mystery Mansion Screenshot
Mystery Mansion Screenshot
Mystery Mansion Screenshot
Mystery Mansion Screenshot

Alternate Titles

  • "Mystery Mansion Adventure" -- Android title

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Analysis of the source code reveals a later addition of a "twisty maze of passages, all alike" following the initial 3x3x3 mansion layout; comparing the commercial lifespan of the computers for which the source code was written, some have concluded that this reveals the origins of Mystery Mansion (or just Mansion, as it was often called) as falling in between Will Crowther's initial release of ADVENTURE and Don Woods' subsequent polishing of it into the form known today.

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Contributed to by Xoleras (65924) and Pseudo_Intellectual (47892)