Batman Arkham Asylum - Pt 2

Batman has come to learn the truth about Dr. Young and her deal with the Joker to make the Titan formula. Now he has to do everything he can to get to her and her formula notes before The Joker does. However, just when you think she's finally safe and sound, The Joker has an explosive primed and ready for her. Then Harley Quinn takes Warden Sharp as a hostage and Batman has to track her down in order to get the Warden's security sequencer code clearance. Now Batman makes his way to the Botanical Gardens where the Titan formula is being produced in an underground lab.