Nintendo leads Japan's First 6 Months of Sales

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RidingMower said:

It appears to me at least that they choose not to step on each others toes. PlayStation could make a Mario Kart game and have a large line up of family friendly games made at any time, but they haven't with their friendship they choose not doing so.

http://www.vgchartz.com/game/70621/littlebigplanet-karting/

http://www.vgchartz.com/game/70744/playstation-all-stars-battle-royale/