 During the game, Kessler tells Snake a rumor about Big Boss being  given cybernetic implants by Dr. Petrovich after reportedly losing  his limbs during the events of _Metal Gear (1987) (VG)_ (qv). While  certain fans interpreted this as a jab directed at  _Snakes Revenge (1990) (VG)_ (qv) (in which Big Boss is a cyborg),  in reality this is a reference to Kojimas previous game  _Snatcher (1988) (VG)_ (qv). In Snatcher, the Dr. Petrovich Madnar  character was the head of original snatcher project.