The incantation heard in the opening sequence sounds like "Cthulhu fhtagn R'lyeh," a bastardized version of an incantation in the H.P. Lovecraft story 'The Call of Cthulhu'. "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn", which translates as "In his house at R'lyeh, dead Cthulhu waits dreaming."