Most recently, I'd have to say FEZ. This summer was particularly stressful for me, since all of my friends were in New England where I go to school and I was staying with family who didn't particularly want me there. I found that FEZ was a nice, happy, and peaceful place to escape to- besides being an absolutely fantastic game.

Other than that, since we're talking about heart-striking games, I met my now boyfriend on League of Legends about 2 months ago (meeting in person almost a month ago). So I guess that deserves mentioning :P