Shadowmark outside of Fusion City. Commonly banished criminals or descendents of survivors of The Cataclysm. They are often horribly disfigured and mutated due to exposure to the toxic world of the Shadowmark. The "cockroach" moniker relates to the popular saying that the only creature that would survive the end of the world would be the cockroach. Surviving off of salvaged tech from the world before the Cataclysm, these survivors make do with what they can salvage and build themselves. The primary difficulty for them is access to drinkable water. There aren't many bodies of freshwater left in the irradiated wasteland, and finding still abundant wells is extremely difficult. Most areas that have drinkable water already have a settlement built around it. Some roaches band together in small settlements to try and survive off the resources and skills of each other, prefering to call themselves 'Wastelanders', while others group together with more hostile intent. These raiders often attack wastelanders in an attempt to steal resources, food and particularly water.
Roaches are often "cybernetically enhanced" in the loosest sense of the word. It's nowhere near as elegant as the cybertech available to citizens. Roaches make do with what they can find and their crude enhancements are often practical in nature, rather than elegant or cosmetic. Most of the time these modifications are made out of necessity rather than free will, and some roaches can appear to be half-robotic monstrosities. The modifications take a heavy toll on the mind, and heavily modified roaches are often eccentric and disjointed in their behaviour.
Wasteland Raider by Maxim Verehin