Zoids Struggle was released on the 18th of November, 2004, and was the first Zoids game to be released on the Playstation 2. The game included a story mode which, like Zoids Saga, interacted with multiple Zoids television series. The release was Japan-only, meaning that it can't be obtained outside of Japan without importing or by being downloaded as a ROM. In the story, a young pilot called Kein searches for his older sister Sheryl, who disappeared a year ago in a mysterious incident involving a Death Saurer. Zoids in this game were also customizable allowing the player to upgrade parts by earning points in other areas of the game.