Video games that require “visual analysis” such as Tetris could be instrumental in alleviating the symptoms of PTSD, a study has found.

http://www.piercepioneer.com/playing-tetris-can-prevent-the-brain-from-recalling-traumatic-memories-study/42985

http://www.dailymail.co.uk/sciencetech/article-3152299/Could-playing-TETRIS-banish-bad-memories-Retro-Nintendo-game-reduces-risk-post-traumatic-stress-disorder.html