ARQuake: The Outdoor Augmented Reality Gaming System by Wayne Piekarski and Bruce Thomas. Big thank you to the Tinmith Augmented Reality Project for maintaining an excellent archive of research, photos and videos, without which this deep dive in ARQuake would not have been possible. Please check out tinmith.net for more information!
Most of us gamers have heard about the Quake experience in VR on the Oculus Rift. Here is my latest Quake gaming history video [23 minutes length] about the less well known, very first Quake experience in virtual reality.