Batman: Vengeance is a 2001 action-adventure video game based on the fictional superhero of the same name. It was released for PlayStation 2, Game Boy Advance, GameCube, Xbox and Microsoft Windows. The game was developed and published by Ubi Soft in conjunction with Warner Bros. and DC Comics. The game is based on the television series The New Batman Adventures, and features most actors from the show reprising their roles. The story centers on Batman's investigation of the Joker's apparent death after their latest encounter, while having to deal with other villains and their schemes, all part of a larger plot orchestrated by the Clown Prince of Crime. Batman: Vengeance received mixed reviews upon release. Plot Batman saves a woman named Mary from a bomb placed by the Joker at Gotham Chemicals, who is holding her son hostage for ransom. Using a transmitter, Batman tracks down the Joker and Mary to a partially demolished Gotham Bridge, where she is unmasked as Harley Quinn and the kidnapping scheme is revealed to be a plot to trap Batman. Batman defeats the Joker, but the latter falls off the bridge to his apparent death. Suspicious that the Joker survived, Batman lets Harley escape in order to monitor her using the transmitter. Batman and Batgirl are alerted to Mr. Freeze attacking Gotham Industrial Research to kill scientist Isaac Evers, the creator of the miracle drug Promethium for cryogenically frozen people. Freeze seeks revenge against Evers for a promotional Promethium video he believes Evers sent to mock him. While pursuing Freeze, Batman uncovers Evers' dealings with the Joker, who funded his research after his initial government funding was cut because of Promethium being unstable. After saving Evers and defeating Freeze, Batman discovers Poison Ivy has created a new species of super-plants infested with deadly worms, and tracks her down to the remains of Gotham Chemicals. There, he finds Mayor Hamilton Hill, who explains Ivy blackmailed him and other wealthy socialites by poisoning them with her worm-infected plants, which were created from a mysterious chemical. Batman defeats Ivy and obtains an antidote to save her victims. Batman witnesses the Joker's goons hijacking a blimp and speaks with Harley, who informs him that they have been operating on their own since the Joker's apparent death. After foiling their plan to send explosive Joker toys into the city's sewers, Batman finds an abducted Issac Evers. He explains that