
The story of Days of Ruin is unconnected to the stories of previous games. Almost 90% of humanity has been killed off following devastating meteor strikes which have destroyed much of civilization and caused a massive dust cloud to blot out the sun, preventing photosynthesis and thereby preventing the growing of crops. Scattered survivors pick through the wreckage, and the remnants of several military superpowers patrol the ravaged landscape, some factions protecting the innocent while the others prey upon them.[9][19]