Oh man, this is going to be a long one.
First off, this isn't a "video games helped me deal" story - it's a little more parasitic/symbiotic than that.
So I was playing Dark Souls. I was also dealing with a heck of a lot of stress and anxiety and depression in my life. Many, many people have noted the connection between Dark Souls and Depression - that sense of futile failure over and over, and the decision every time you pop back up at a bonfire. Aaand let's just say that I noticed a lot of, er, synchronicity between the game and my life.
First off was that when I first started playing was when I started to feel very wrong. I have ADHD (the inattentive type, not the go go go type), and life was hitting me pretty hard. So here's a list of everything that happened through everything.
Started Playing - Started taking antidepressants (again).
Cheesed the Capra Demon with fire bombs - Felt severely like a failure for the three days either side.
Beat the Gaping Dragon with Lautrec and Solaire - First time I told my wife that I needed help.
Got internet strangers to help me bit Queelag - Asked more people, some who didn't even know there was anything wrong, to help. I was ready to reach out. Lowest point coincided with Firelink going out of commission.
Made it through Sen's Fortress to Anor Londo - Was put on strong anti-anxiety meds, and felt a kind of clarity I hadn't felt in a long time.
Helped someone else beat Ornstein and Smough - I felt so great to help someone progress, and finally felt I wasn't focused on myself any more. The day after, I talked to my wife about her anxieties and how I can help.
Aaand I stopped playing. It somehow didn't feel right any more.
Strange but true.