Chris Colorado takes place on an apocalyptic future Earth. After a data-processing bug prevents mankind from detecting the fall of a meteorite, it results in the destruction of nearly all life on Earth in a massive disaster later known as The Great Crash. After some time, many groups of survivors gathered together to try to rebuild and create a newer, more peaceful society, and formed "The World Federation". After several decades of peace, a mysterious dictator called Thanatos, a human wearing a helmet to conceal his face, with an army of humans converted into cyborgs called Thanors, started The Mega War, which ended with Thanatos taking control of Europe. However one group, "The Centurions of Freedom", led by Commander Richard Julian, succeeded in striking back and defeating Thanatos, who seemed to take refuge in what remained of Glorious City (Earth's first world capital, now mostly destroyed by the meteorite) where a strange black liquid from the meteorite, now called "Dark Torrent" by the Centurions, enabled him to recruit a new army of Thanors out of the survivors still living in the ruins of the city and start a constant skirmish-war against the World Federation.