Work is underway on an augmented reality game involving the use of multiple, trackable, markers.
This video shows some early development of the code that allows for more than one marker to be tracked on the screen at one time. I've already tested it with 4 markers at a time and I'm confident that it can handle many more than that without a sweat.
Current issues include: tracking being interrupted by glare on the printed symbol, 3d models don't interact with each other.
It goes without saying that there'll be a guide slash tutorial to go along with this in the near future. I'll also be releasing all the code as open source when the game is complete.