Trivia: After Dr. Young is killed in the warden's office, go back down the stairs but do not go through the archway. Instead, after going down the steps, turn right and you will come to a blank wall. Spray the explosive gel on the wall three times and then detonate it. The wall will break apart and you will find a secret room. Go inside and you will find blueprints for the Arkham City Prison Complex.

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