The entire journey is documented on the VGHF site, and it’s a wild, exciting read. Basically, Dylan Mansfield, a researcher and writer, contacted one of the developers who worked on a game for the prospective SEGA VR. Lo, said dev was able to track down an old build on a CD-ROM. From there, the game, Nuclear Rush, and its supporting system were reverse engineered into an emulator that can run on the modern day HTC Vive. A piece of kit that never made it to market, now playable after nearly 30 years in limbo.
The game itself is perhaps crude by today’s standards, but it’s easy to see this 2D FPS game being mind-blowing back in 1994. The hardware would’ve been somewhat affordable at $200, was advertised as early as 1993, and worked off the Sega Genesis (Mega Drive to UK and Irish readers). I won’t pretend to be able to summarise the in-depth game development process outlined in the piece, but it’s worth a read if this sort of thing intrigues you. Links to the rom and emulator are included at the bottom.