Guilds will increase the chances that monster special abilities activate in battle, and recruiting players to the game offers free stat points and cards.
"It uses very similar technology to what you'll see in a Wii game control" to determine when to activate, said Brian Frasure, iWalk's director of clinical services.
It was an astonishing triumph of human visual-spatial reasoning, and one of the first major scientific advances to come from playing a video game (though plenty of software engineers I know would argue that video games activate much more creativity than we care to acknowledge).