Dragon Ball Z: Attack of the Saiyans, known in Japan as Dragon Ball Kai: Saiyan Invasion (ドラゴンボール改 サイヤ人来襲 Doragon Bōru Kai Saiyajin Raishū?), is a video game based on the manga and anime series Dragon Ball for the Nintendo DS. The game is developed by Monolith Soft and distributed by Namco Bandai in North America and everywhere else under the Bandai label. It was released in Japan on April 29, 2009. The game was released in Europe and North America in November 2009. The game was originally planned to use the Z moniker but was changed to Kai to associate it with the Dragon Ball Kai revision.