Box art is certainly not something to judge a purchase on, but something nice to look at when you pull off the plastic and pop that CD in is always a nice extra and can certainly add to presentation.. and actually, it has been proven that on some occassions a nice box art will push people to buy a game... its called appealing to the senses
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of course with DMC2 the box art could be a picture of a giant terd stain and id buy it
[]D