Scott chose the sketch Necronom IV , from Giger 's Necronomicon , as the basis for the Alien because of its sexual ambiguity and phallic overtones .
Giger , design the Alien .
Scott chose the sketch Necronom IV , from Giger 's Necronomicon , as the basis for the Alien because of Alien 's sexual ambiguity and phallic overtones .
Giger , design the Alien .