Heard of it? We wrote it!
It's called Warp, and has been floating around HP for about 2 years now.
After spending countless hours playing Adventure, Zork, FisK, and Mansion a friend and I here at HP Corvallis decided we could do one better.
We put together an enhanced Zork-like parser, built a complete world scenario (centered around a seacoast resort), added LOTS of puzzles
(including many spinoffs from the other games), and put the whole mess on a 3000. We tried to include everything you ever liked about Zork and Adventure, then tried to improve on it.
Entering development as early as late 1979/early 1980. Playable via a HP3000 or HP9836 mainframe.