The sound designer of The Stanley Parable, Robin Arnott, has a new work which designs a trance via the music of the player’s own voice. SoundSelf accesses the deeper layers of consciousness via breath, music and technodelic visuals.
soundselfgame.com
Designing a Trance: Meditation and Game Design
http://www.gdcvault.com/play/1024156/Designing-a-Trance-Meditation-and