Batman goes to investigate, but is confronted by the mysterious "Arkham Knight".
Fighting through the Knight's militia, Batman confronts Scarecrow, who has rigged the Ace Chemicals building to explode.
However, Batman refuses to be apprehended until Scarecrow has been stopped, and locks Robin in a holding cell.
Batman researches a cure for the mutations, and orders Robin to watch over the infected.
Batman investigates Scarecrow's presence, and searches for him in a rooftop safehouse, but instead finds and saves Poison Ivy, who was being held captive by Scarecrow's henchmen.
In a makeshift Batcave in Gotham's Clock Tower, Barbara Gordon is collecting information on Scarecrow's new toxin, and traces its production to Ace Chemicals.
The game has received universal acclaim but was criticized for the extensive use of the Batmobile combat segments.
The PC port was released to widespread criticism over performance issues and technical glitches, eventually leading to the PC version being pulled from online retailers and digital distributors for months.