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Ben 10: Protector of Earth
Secret Challenges
Do the following to unlock Secret Challenges.
Challenge
How to unlock
Secret Challenge #1
Ultra Rank on Meteor Crater.
Secret Challenge #2
Ultra Rank on Yellowstone.
Secret Challenge #3
Ultra Rank on Mt. Rushmore.
Secret Challenge #4
Ultra Rank on Riverboat.
Secret Challenge #5
Ultra Rank on Null Void.
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