IE Crash: economic, energetic, social and healthcare infrastructure disappears or is shattered GLOBALY, overnight, followed by several meltdowns, major leaks in chemical industry. And, inevitably, major damage of knowlede base. Ability to recover from such event, as described in shadowrun timeline, is optimistic to the level of expectation of major miracle every day years in the row. For apocalyptic setting all you need is to apply pesimism and Murphy's laws. I understand, that this is different from "The Road" or "Cats Cradle" scenario, where all is gone including hope. But Fallout/Wasteland setting is another case, since those are recover/rebuild scenarios, where humanity prevails. Just for an inpiration, nice image of what Crash would have done and how it creates beautiful urban postapo setting I'd recomend Knut Faldbakken: Aftenlandet (well I not sure if it was translated to eglish)