fun fact
I don't know if they ever fixed it with a patch or firmware update, but the Serah wallpaper you unlock for getting the platinum is glitched and if you have it up as your theme it'll cause your PS3 to freeze when you try to load up any game
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http://i.imgur.com/pRjIr.png
http://www.yourgamercards.net/trophy/a/CaptainRockman.png