A construction action adventure with futuristic heavy machinery! The story of 'Gigabuilder' and the terraforming of Mars! 'Gigabuilder' takes on the unimaginably grand project of building a city on Mars! The given mission is to help the citizens of Terracity by constructing various buildings on Mars! From fierce sandstorms to saboteurs trying to monopolize Mars's resources, crises and adventures that can't be predicted for a single moment await Gigabuilder...