Batman Arkham Asylum (Walkthrough) - 2 Riddles on Penitentiary
Riddler's Riddle on Batman Arkham Asylum.
Riddle #. 1 - "When is something right in front of you but still hidden from the view?"
Riddle #. 2 - "Prometheus, Arkham guards' most wanted and most hated."
Location: Guard Room (Penitentiary)