I play them once in a while and I find them relaxing.

It is actually a very interesting subject, I read about a study and project being done a few years ago providing Virtual Reality Therapy for Iraq Veterans. And when I was looking for the article to post here, I found another one on using similar science for first responders from New York on Sept. 11, 2001.

Here are the articles, just add a W to the start of the link.

Virtual Reality Therapy for Combat Stress
ww.npr.org/templates/story/story.php?storyId=4806921

APA: Virtual Reality PTSD Therapy Shows Promise in Iraq Veterans
ww.medpagetoday.com/MeetingCoverage/APA/tb/9388

9/11 PTSD Therapy
ww.sciencentral.com/articles/view.php3?type=article&article_id=218392349