arcade games and home consoles; the unit did not advance beyond the prototype stage, though Sega incorporated some of its head-tracking technology into its arcade cabinets. Most notable was the VR-1 virtual reality 3D arcade attraction released by Sega in 1994.

Reflection Technology, Inc. (RTI) had been developing a head-mounted, stereoscopic head-tracking system using light-emitting diode (LED) displays, the Private