A free full text article in Frontiers in Psychiatry reviews serious games and gamification as they apply to mental health. The authors discuss 6 major categories: exergames, virtual reality, cognitive behavior therapy-based games, entertainment games, biofeedback, and cognitive training games.
Fleming TM, Bavin L, Stasiak K, et al. Serious Games and Gamification for Mental Health: Current Status and Promising Directions. Front Psychiatry. 2017 Jan 10;7:215. doi: 10.3389/fpsyt.2016.00215.