Doesn’t surprise me at all. The game actually requires some thought to play.

Playing a popular online game may improve some older adults’ abilities to focus their attention, a new study suggests.
Those who spent two weeks playing “World of Warcraft” β€” a game in which players take on the role of a character, and role-play with others in fighting monsters and completing quests β€” improved more on tests of attention and of spatial abilities than those who didn’t play the game, the results showed.
“It is a cognitively challenging game, in a socially interactive environment that presents users with novel situations,” said study researcher Anne McLaughlin, an assistant professor of psychology at North Carolina State University.

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