 The games instruction manual features a fictional document  outlining Snakes mission to the reader. The document was actually  based on a similar mission sheet featured in the J.C Pollock novel,  Crossfire. Moreover, other aspects of the game (such as the romantic  relationship between an American solder and a Czech skater) were  also based on aspects in Pollocks book. J.C Pollock is reportedly  one of Hideo Kojimas favorite authors.