Riddler trophy

#1kenpachi99Posted 11/7/2012 5:30:49 PM
In order to unlock challenges in Arkham City, do you have to collect specific Riddler Trophies or just a certain number of them?
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#2EremyndilPosted 11/13/2012 1:10:24 PM
I believe its the number of trophies collected.
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