This forum is the only place I know of where there’s even a slight chance of getting an answer to this.
HAUNT was a strange game from the very early days of text adventures (the author hadn’t seen Zork). It was written by John Laird, then a graduate student at CMU, on a PDP-10 in a long-forgotten language called OPS-4.
A page linked by the Wikipedia article has this comment:
It’s not very easy to find a playable version: the only way I know of to play it is to run this PDP-10 emulator. When you finally get it running, you’re greeted with a long story about a man whose wife was killed by a rampaging moose, who then built a mansion on the spot, filled it with treasure, and never came out. The mansion is supposedly cursed so that only the man’s child (who was, as an afterthought, “stolen by gypsies”) will be able to spend the night there without going insane.
You begin in a forest, at a bus stop. You have to wait for a bus to arrive. The bus takes you to a gate in a wall around the haunted property, and you then follow the wall until you come to a place with a speaker and microphone, which allow you to communicate with a crusty fellow who won’t let you in until you answer his questions (things like “What will permanently rob Superman of his powers” and “What is the airspeed velocity of an unladen swallow”).
I bogged down here for a while, but I just managed to answer one of the questions and will try to explore the rest of the game. In the meantime, I wonder if anyone here has played this, or heard about it…?