 When Snake talks with Director Granin in his office, the theme  playing on the radio is the Metal Gear Solid theme. Also, the  specifications he shows to Snake are of Metal Gear REX from  _Metal Gear Solid (1998) (VG)_ (qv). There are also figurines of  Metal Gear REX, Metal Gear RAY from  _Metal Gear Solid 2: Sons of Liberty (2001) (VG)_ (qv) and Jehuty  from _Zone of the Enders Z.O.E (2001) (VG)_ (qv) visible in the  background, along with a photograph of Granin with his American  friend (the grandfather of Hal Emmerich, Metal Gear REXs chief  engineer in the original Metal Gear Solid).