During the latest Hackathon Art-A-Hack 2016 I've participated, our team have been working on an open source Unity package for multi-user full-body tracking Virtual Reality experience for SamSung VR gear called KinectVR.
Through the five weeks (five Saturdays), we've explored and built new features based on an existing Kinect-> Unity VR package, developed by Filip Baba. Those features including live rigging for multiple users, game character switching, game scene switching, live skeleton tracking for up to 6 users, physical interactions between users and much more.
Here are some demos of the progress and at showcase for the Art A Hack.
Visit http://kinectvr.com/ for more info and package download