 Players could then use their units to claim neutral or "brown" territories or to invade other player territories.Players would often have to be careful not to spread their forces too thin, lest they risk their territories revolting (or turning into "purple territories").The game has four scenarios, set in 1914 (the year World War I broke out), 1939 (when World War II broke out in Europe), and 1995, as well as a fictional scenario set on a post-apocalyptic Earth in the year 2500, after an asteroid impact on the Pacific Ocean occurs in 2030.