Most bosses in a Metal Gear videogame

The Metal Gear game with the most bosses is Metal Gear 2: Solid Snake in which there are 11 deadly encounters with major enemies. These enemies, in order of appearance, are: Black Ninja, Running Man, Hind D, Red Blaster, Four Horsemen, Jungle Evil, Night Fright, Dr Drago Pettrovich Madnar, Metal Gear D, Gray Fox and Big Boss. Guinness World Records Gamers' Edition 2009.