Remember the Atari Mindlink? You probably don’t. It was an unreleased 1984 controller which promised hands-free, brain-powered gameplay. Now welcome to the future, where Toronto’s Interaxon has developed a series of crazily sophisticated brainwave-powered games which help people relax and focus their minds: Interaxon, which specializes in “thought-controlled computing,” has created games that train the brain to switch between producing alpha waves, linked to relaxation, and beta waves, linked to focusing. A gamer wears a headband with sensors that contacts his or her forehead and tries to relax or focus on demand. What’s more: Interaxon’s CEO Ariel Garten…