Ben 10: Protector of Earth for Nintendo DS is an action-adventure video game revolving around the animated series 'Ben 10.' Players control Ben Tennyson, a young boy who uses the Omnitrix, a device that enables him to transform into various alien superheroes. Players embark on an action-packed journey across famous American landmarks, fighting off an array of enemies and bosses from the series, utilizing the unique abilities of different alien forms to save Earth from evil forces. The game combines combat, puzzles, and platforming elements suited for fans of the cartoon and young gamers alike.