A couple days ago I’ve been looking at the Wolfenstein 3D source and found out that there are references to some kind of VR mode support, and the -virtual switch defined to activate it. Huh, I thought, VR in a DOS game from early nineties?
Running the game with the switch makes NTVDM terminate it with an “illegal instruction” error and I couldn’t quite figure how that code is supposed to work, so I’ve looked it up. Turns out somebody has done something with it just a couple weeks ago: Blzut3's Weblog . You can’t really run the original game on modern-day VR headsets with this, but it’s interesting nonetheless.
Couldn’t find any gameplay videos of the original game as intended for VR but this is what Cybertag was like: https://youtube.com/watch?v=l9n_TkFIttk