Leaving directly after "Knee Deep In the Dead" left off, Crpl. Flynn Taggart and Pfc. Arlene Sanders are trapped on the Martian moon Diemos which is in current orbit over earth. Earth itself has clearly been invaded by the satanic creatures that Taggart and Sanders had managed to destroy on Diemos. But after the duo find a way to escape Diemos and land in Salt Lake City, they find that the world has drasticlly changed: mass zombies roaming the streets, and hell princes and steam deamons crushing any form of human resistance. Teamed up with a fourteen year old computer genious named Jill and a mormon sniper named Albert, Taggart and Sanders must now travel to Hawaii in order to join the last outpost of humanity on earth. Это и многое другое вы найдете в книге DOOM: Hell On Earth (Dafydd ab Hugh, Brad Linaweaver)