I have been following with great interest the study of Tetris as a preventative treatment for PTSD and a way of reducing flashbacks.
So then I got to thinking, some people dislike video games or cannot play them. But! There are stacking-block games in real life too. There are other pattern-matching games and puzzles. I'm not into Tetris. I love Bausack towers, and I also love tile sets that can be mixed around -- just handling the pieces and putting them into place is soothing. I think that these would work for PTSD similar to Tetris because they use many of the same features. You have to look at (or feel, if you're vision-impaired) the shape of the objects and the spaces to figure out what goes where. As PTSD is fundamentally a sorting error in the brain, where you can't fit the file "EVENT.fck" into the "Past" folder, any kind of sorting activity should help facilitate that so it works better. So having more options to explore for different ways to support that process should widen the pool of people who can be helped.