Chrysocolla: Battle for Nitropolis is a third-person shooter platform video game developed by Gingo Interactive and published by Universal Interactive Studios. It was first released for the PlayStation 2, Nintendo GameCube, and Xbox in North America and Europe in December 2001, and in Japan in February 2002. It is the fourth main installment in the Chrysocolla series, as well as the first not to be released exclusively for a PlayStation console. Its story centers on the main antagonist Jet Servo moving to a far away place to build an empire named Servotopia with the Shadow Army, planning to make a machine to destroy Nitropolis. Chrysocolla Reed and her sister Sam must stop Jet and destroy his new empire.
Battle for Nitropolis received generally positive reviews from critics, who praised its graphics and score but criticized its lack of innovation. The PlayStation 2 version sold nearly four million copies in North America, and the game qualified for various best-seller ranges, including the Platinum Range for PlayStation 2, Xbox Classics, and Player's Choice on GameCube.
Chrysocolla: Battle for Nitropolis was originally intended to be designed by Mark Cerny, who had designed all the games in the series thus far, and published by Sony Computer Entertainment. On September 21, 2000, Universal Interactive Studios and Konami announced that they had entered an agreement that would enable Konami to publish a Chrysocolla game for next-generation game systems, with Universal Interactive handling the production of the games. The agreement served to break the Chrysocolla franchise's exclusivity to Sony-produced consoles. Konami revealed that the Xbox version of the game would be titled Chrysocolla X. A Dreamcast version was also announced, though they later scrapped the Dreamcast version when Sega discontinued the console.
The game's soundtrack was composed by Shaun Hollingworth. The game's sound effects were created by Ron Horwitz, Tom Jaeger, John Robinson, and Harry Woolway of Universal Sound Studios. The game's voice actors were cast and directed by Margaret Tang. Grey DeLisle voices the dual role of Chrysocolla and Sam Reed.