"We are delighted with the phenomenal success of Nicktoons Unite! and the game's recent achievement of this significant retail milestone," said THQ senior vice president of sales and distribution Scott Guthrie. "The new reduced price point will allow even more families to interact with these beloved Nickelodeon characters from some of the top-rated animated kid's television shows."

"The success of Nicktoons Unite! is a testament to the strength of the Nicktoons roster of amazing characters as well as the great creativity of THQ," said Nickelodeon vice president of digital products Shaul Olmert. "It's great to see the game and our characters embraced by gamers as an all-time favorite."

The Nicktoons video game originally launched in October 2005 and has shipped more than one million copies across multiple platforms worldwide, adds the release.