Batman: Arkham Trilogy(Arkham City) Walkthrough Part 4 (Ra"s AL Ghul Boss)

Set 18 months after Arkham Asylum, the game sees Bruce Wayne incarcerated within Arkham City, a new super-prison based in the decaying urban slums of Gotham City, established by former Arkham Asylum warden and current Gotham mayor Quincy Sharp. While contending with various inmates taking advantage of Arkham City's lawlessness, Batman must uncover the secret behind a sinister scheme, code-named "Protocol 10", orchestrated by the facility's warden, Hugo Strange. At the same time, the Joker is slowly dying due to the unstable properties of the Titan formula in his blood, and infects Batman with the same disease to force him to find a cure.