Unlock Negative Zone Costume
To have this costume appear in your game you must first change the 'Time' and 'Date' settings on your PS3 to a month past August 2012. This must be done offline otherwise the PS3 will change your date and time back to the correct time.
Click the link below if you need help changing the settings
http://manuals.playstation.net/document/en/..
More tricks, tips and cheats for this game are right here - The Amazing Spider-Man cheats
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