Hi, I’m Ant. Welcome to Retroactive Fiction.
I helped to recover Wander, a program for creating text adventure games. It dates from 1974 (or earlier) and might be the first interactive fiction software ever created. Here are the details. And here are the download links for Wander and for some of the games that were written with it.
Some videos I made about some other text adventure games:
Retroactive Fiction 
Take a look at Highnoon, a mainframe BASIC game written in 1969 and 1970. http://www.mybitbox.com/highnoon-1970/