There is little hope for stopping cheaters.

example: Moon Ribas, an artist, has a small vibrating sensor embedded permanently in her feet that communicates wirelessly and vibrates whenever there is an earthquake somewhere in the world. https://en.wikipedia.org/wiki/Moon_Ribas#Seismic_Sense

The idea can be extended to an implanted device that receives subtle signals from the user to have a representation of the game state and communicates back through gentle sensations.