I seem to remember something similar in the late 60s, only w/o the video game aspect. "Alpha State", "Biofeedback", or something like that.
And isn't this similar to what Scientology claims to do, training your brain waves to reach a "clear" state, or some such? Be afraid, be VERY afraid...
I'll stick to the tried and true methods , thak you very much. If you need a machine, that's too modern for me!