The nice thing about the fall of civilization is all the stuff left behind. Granted, it used to be in better shape rather than the piles of scrap and dust that's all that remains, but there's no denying there's a lot of it. Get a decent recycling system going and you'll have all the materials needed to keep the survivors surviving, in whatever state they may be in. Down in the depths of the traveling city of Colossus, though, your job isn't about quality of life but rather managing the intake, sorting the piles of random materials and then converting them into whatever goods and components the city requests.
The World's End As the Ultimate Scavenging Opportunity
Steel Gullet is an upcoming automation recycling game where you've got an endless supply of scrap and need to convert it into useful materials, but the scrap is rarely just one type of item so needs to be filtered using a variety of methods before processing is an option. A pile of wood and concrete dust, for example, just takes a quick trip through the sieve to separate the two, while concrete chunks and iron scrap need to be crushed before going through...
