I love the idea of a biofeedback game that challenges you to relax faster and more deeply than your opponent. Best of all -- there are build notes so you can make your own biofeedback driven game. it would be perversely great to do one that's wired to so you win the more stressed-out you become, and attach it to an espresso machine, and a monitor that shows nothing but comments from Slashdot that have been ranked -1 or lower.
Simmer Down Sprinter is a two player, sit-down, arcade style video game I designed and programmed in which players compete to move runners around a track. The game is controlled by player’s bio-feedback. The more relaxed the player becomes, the faster the runner moves around the track. Essentially it is a game of competitive relaxation.Link (via Evhead)