I just saw this (years too late)! I'm a game developer and wondered if you'd be willing to open source this project? Or team up and build a version for modern VR (or anyone else wanting to build something)?
I primarily work in Unreal Engine on 3D games, as blueprints can handle most of the complex logic (I trained as an artist before jumping into level design, then development, and still prefer the visual method).
I loved Knightmare as a kid and have waited (unsuccessfully) for it to be rebooted since the 90s! A VR game would work even with Knightmare newbies (I've shown the TV show to my young relatives and they loved it). You don't need to have seen the original to understand the concept of wandering alone through a dark and mysterious dungeon and solving puzzles.