This could be a great scenario mod, maybe add a lot of NPC’s so it could be like some sort of “Everyone has gone to rapture” scenario, where the earth is more or less just a pre-hellscape full of choices of kill or be killed by NPC’s.
If I was good at modding, this would be the perfect mod to work with a brainchild of mine I was thinking about: “The Hottest War”, which would be a pre-cataclysm (So you would still have some people around, with normal robots), but also set in a WW3 scenario of war-torn New England.
Too bad I am definitely not patient enough to code/learn to code for such a strenuous process for something like this.