Traditionally, what we do is called "Multiplayer Full Body Free-Roam Location-Based Virtual Reality Entertainment". We feel that it takes a lifetime to pronounce, and that is why we call it Seamless VR.
Putting it simply, Seamless VR is a gateway for one or several players to fully immerse into virtual reality - as deep as the state-of-the art technology only allows it. You see and move your body as you would in the real world, see other players, interact with virtual objects - and have complete freedom of movement within the physical location. No tethers. No motion sickness. Just the lightweight portable gear - and the regular walls you might want to avoid bumping into.