Especially as you get older. From Purple Pawn:
“According to a study by researchers with the Mayo Clinic, seniors who play games are less likely to experience mild cognitive impairment (MCI), an intermediate stage of dementia. Nearly 2,000 subjects, 70 years or older were followed for 4 years, interviewed about mentally stimulating activities, and evaluated for cognitive function. Those who played games at least once-a-week were 22 percent less likely to suffer from MCI.”
The moral of the story? Play a game this week!