I do understand that a solid premise of S.T.A.L.K.E.R. is association with post-soviet Russia, historical events, geographical places, as well as certain mythos. Nonetheless, imagine if Silicon Valley of the USA, was a post-industrial hell, an abandoned man-made wasteland of once mighty steel - now rust and mercury - filled with toxic smog. Land divided between zones, as originally would relate to territorial division between share of corporations, focused mainly on production. "Stalkers" are treasure hunters, intended to claim whatever of value they can find in the so envisioned Silicon Valley. Understandably, the area is under governmental no-go, thus the "Stalkers" - people who break into, break through and bypass, steal, stalk areas and places, trespass in general. Wonder how would this go with the notion of trespassing the border between the land of the living and the realm of the dead. Further down this line, the Silicon Valley, could actually be a portal-land, a place where dimensions interfere, creating an experience of unique half-life: the coexistence of that which is and that which dwells beyond.
Anyway, just a loose idea on how to "export" S.T.A.L.K.E.R. to the USA.
We just need to kill the Silicon Valley.