Civilization: 25 years, 33M copies sold, 1B hours played, and 66 versions
I started playing civilization when I was 12 or 13 (Civilization 1), and still, to this day, the closest thing I have to meditation is playing Civ V.I travel a decent amount, and one of my great joys is being on a plane without wifi but with inseat power (Civ V on the mac is a ridiculous power hog), and knowing that I've got X hours of civilization to play with no one to bother me.My strategy isn't great, I have everything set to Random, and I just drop into whatever situation and work it.  At the end of a flight, I close that scenario, and rarely pick it back up - I start a new one.  And I feel relaxed and my mind is clear.  It's amazing.