player preference. For example, the Judge bot always attacks leading players with the highest kills score. Players can also issue commands to them as long as they are on their respective team, such as follow or hold position, and set waypoints for them to walk to. The game includes by default six different maps and each has two variants; the only change is the placement of the bases. Most of the maps are large ones, ideal for 32 players at once, with small variants for 4-16 player games. Plot Perfect Dark Zero is set in an alternate 2020, where a large percentage of the world is controlled by corporations. The most notable of these are dataDyne, headed by Zhang Li, and the Carrington Institute, headed by Daniel Carrington. The player is cast as Joanna Dark, a bounty hunter working with her father Jack and computer hacker Chandra Sekhar. The team is after Nathan Zeigler, an independent researcher who has been captured by a Hong Kong triad leader named Killian. Joanna and her father rescue Zeigler, but Killian manages to escape. Zeigler explains that Killian was trying to obtain his research, which contains information about a dangerous weapon. As Zeigler refuses to go anywhere without his research, Joanna is sent to retrieve it from a case in a nearby safe house. Zeigler then takes a device called a neurodrive from the case and uses it to implant his research data into Jack's mind. Before dying to his injuries, which were inflicted by Killian, Zeigler tells Joanna and her father that they must find a scientist named Dr. Eustace Caroll. While trying to escape, Joanna and Jack are attacked by a dataDyne assault team assisted by Killian in a dropship. Joanna manages to kill Killian and escape with Chandra, but Jack is captured by dataDyne. Joanna learns that her father has been taken to a mansion in China, where Zhang Li lives. Joanna infiltrates the mansion and finds her father in a cell. He has been tortured, and begins speaking gibberish to her, an aftereffect of the neurodrive. The pair fight their way out of the complex, but their extraction is interrupted by Zhang Li's daughter, Mai Hem, who kills Jack before Joanna escapes in a hovercraft. Joanna and Chandra decide to pursue Zeigler's lead and seek out Dr. Caroll, who works aboard a research platform on the Pacific Ocean. Upon meeting