Batman: Arkham City 100% Walkthrough Part 4: Saving the Doctor

In this walkthrough, I'm completing the entirety of Batman: Arkham City on Hard difficulty. Following is a list of everything I plan to accomplish: Beat the main campaign on Hard difficulty Beat New Game Plus Complete all side missions Collect all Riddler Trophies (Batman and Catwoman) Solve all Riddles Complete all Combat Challenges (Batman and Catwoman) Destroy all breakable objects required for the Riddler Complete Riddler's Revenge, scoring 3 stars on each challenge, with all playable characters Complete Harley Quinn's Revenge and pop all balloons Any other collectibles or game modes I may have missed :) In this episode, I save the doctor being held hostage and defeat Poison Ivy as Catwoman. All gameplay was recorded in the highest quality possible. I hope you enjoy! If I missed anything or could execute something better, be sure to let me know in the comments.