Decimated is set in 2187. Earth has been abandoned after hundreds of years of destructive climate change and catastrophic neglect of the environment by corporations and industry. Political and social unrest has left the old cities decimated and hostile to life. Civilization has collapsed and destroyed itself, yet a cyborg police force still wields control over the wastelands.

Only privileged first-class citizens were permitted onto the new world. The unworthy who were left behind – criminals, rebels, political dissidents, and the poor – scavenge in the forgotten cities of Earth, which have become overgrown with jungle, flooded by swamps, swallowed by sand and frozen by ice.

Pollution and technological debris litter the environment, and survivors have set up shelter in destroyed skyscrapers, laboratories, abandoned metros and crumbling freeways.

The world is inhabited by criminals, pirates, bounty hunters, drug lords, slavers, cannibals, victims of genetic experiments and malfunctioning robots, all competing for resources and territory. The cops enforce a totalitarian authority even after society is in ruin, forcing humans to live in the wastelands.