In a world of trackless jungles, colossal beasts, and cruel pre-human civilizations, you must survive the past if you want to save the future! You were only meant to guard the laboratory, but when a treacherous power cripples Doctor Sabbatine's time machine, you're left stranded! Face the savage inhabitants of Silverworld and build your own civilization—or plunder the past and return home unimaginably rich!