
I was having a discussion recently about my favortie cyber-punk novel, which just happens to be When Gravity Fails, by George Alec Effinger.
In 1989, Infocom released an excellent RPG based on the novel, Circuit's Edge. Here's a sparse, but decent fan site that includes a few scans and a couple of walkthroughs.
Incidentally, this is not Effinger's first dealings with Infocom. He actually wrote a short novel serializing the Zork franchise.