By that definition no games are casual games. Your arguement could be made for ANY game.
I would argue that any really popular game is a casual game... because the majority of it's purchaes are going to be from people who play games casually. Casualness is not something inherent to a game but something bestowed opon it by the people who play it.
Casual not being "pick up and play" but "pick up, play then let sit for a long time."
In otherwords basically a direct correlation to how much you play videogames a week. Which is how you judge "casuals" for every other form of media. (Well movies it's usually on a monthly basis.)








