I found and played these systems at http://www.creative-gaming.eu/play13/ in 2013.
The Gaudy Woods
Leaning left and right to steer and rolling the log to go forward or backward. Plus stereoscopic 3D. The Gaudy Woods: http://www.youtube.com/watch?v=FzXZO0tPNb0
Let It Grow!
QR code based adorable plant watering minigame with actual pots and can. By Anna Wonner http://www.youtube.com/watch?v=xldOBPajVCw
Tobias Othmar Hermann
Ping Pong to defeat space invaders and actual spacial movement with PC rigged walker by Tobias Othmar Hermann. http://www.youtube.com/channel/UCZUH7zcvJg_bIbgW7EBnMTw