R. is a videogame loosely based on a 1979 science fiction film, Stalker, (directed by Andrei Tarkovsky), which in turn is loosely based on a novel, Roadside Picnic (written by Arkady and Boris Strugatsky).

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The game combines the nuclear tragedy of 1986 with elements of the 1979 film by Andrei Tarkovsky and original novel Roadside Picnic in which forces unknown have sent physics awry, producing hard-to-spot anomalies where your next step could be your last.

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