incl. update 3 The Harley Quinn�s Revenge mission sends players back into Arkham City to face their final challenge as they interchange between playing as both Batman and Robin,� reads the description. �Gamers must utilise each of the characters� unique combat and investigative skills to uncover Harley�s vengeful plan and shut the gates on the urban mega-prison forever. In addition to experiencing a new storyline, fans can explore new environments and face-off against Harley�s all new gang of thugs. screenshot The Harley Quinn�s Revenge mission sends players back into Arkham City to face their final challenge as they interchange between playing as both Batman and Robin,� reads the description. �Gamers must utilise each of the characters� unique combat and investigative skills to uncover Harley�s vengeful plan and shut the gates on the urban mega-prison forever. In addition to experiencing a new storyline, fans can explore new environments and face-off against Harley�s all new ga...