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One of the things I like about this game is being able to read the data on the Batman mythos, seeing what all I already know and what I don't know. But my problem at the moment is it seems I can't unlock any more and I don't know what I need to do to unlock more. I've unlocked maybe ten or twelve for purchase and then all the others are red. What do I need to do to unlock them for purchase. I don't even know if I unlocked the first group I purchased or if they were already unlocked and I just never knew because I never explored the data until after completing the Mr. Freeze level (which was the second one I did).