"The science-fiction genre is home to a multitude of doomsday scenarios, ranging from the eruption of super volcanoes to an Avian Flu epidemic to meteors crashing into Earth. Imagine the following: in the not too distant future, a worldwide water crisis leaves many third-world countries without the precious resource, and, as a result, kills off most of their citizens. The United States doesn't fare very well either, especially in the drought-plagued Midwest. However, a game just about a water crisis wouldn't be too thrilling or engaging, so another problem is added - large scale earthquakes. In Chicago, around the same time as the massive drought, a 10.3 magnitude earthquake shocks the land and breaks it off from the mainland. Due to the extreme damage, rescue teams aren't able to get into the area and save the survivors."