<P> The sequel Metal Gear 2: Solid Snake (initially released only in Japan in 1990) sees Solid Snake called up to infiltrate a heavily fortified enemy base in Zanzibar Land . Zanzibar Land has aggravated an international oil crisis and declared themselves a nuclear power by kidnapping Dr. Kio Marv after the creation of a bio-engineered algae that produces an oil substitute, and the Metal Gear original designer Dr. Pettrovich Madnar . Snake infiltrates the base and discovers that Pettrovich as well as his former comrade Gray Fox has defected to Zanzibar Land, and that Zanzibar Land is led by Big Boss . Snake destroys Metal Gear D, and defeats both Fox and Big Boss . </P> <P> Metal Gear Solid sees Solid Snake pulled out of retirement by Colonel Roy Campbell in a mission to deal with the "Sons of Big Boss", who, under Liquid Snake's leadership, seized an isolated American nuclear weapons disposal facility on Shadow Moses Island . Snake's mission is to retrieve two hostages (Donald Anderson and Kenneth Baker). Despite both Anderson's and Baker's deaths, Snake infiltrates and learns about Metal Gear REX after meeting up with rookie soldier Meryl Silverburgh and REX's engineer Hal Emmerich, and having confrontations with the Cyborg Ninja . As the games progresses, Snake confronts and defeats each member of the corrupt faction of FOXHOUND (consisting of Revolver Ocelot, Decoy Octopus, Psycho Mantis, Sniper Wolf, Vulcan Raven, and the Genome Soldiers), is able to destroy REX, and personally confronts Liquid . During their fight, it is revealed that Solid and Liquid are twin brothers, artificially conceived from Big Boss's genes during the "Les Enfants Terribles" government project designed to create the perfect soldier, in which one brother was genetically modified to be superior over the other . Liquid harbors a strong resentment towards Snake since Solid was given their father's dominant "soldier genes" and Liquid was cast aside . After a grueling series of battles, Liquid dies from the FOXDIE virus that was previously implanted into Snake by Naomi Hunter in order to wipe out FOXHOUND and the Genome soldiers without risking any damage to REX and the Genome soldiers for retrieval . In the end, it is revealed that Liquid got Big Boss's superior "soldier genes" while Solid was actually the inferior one . The game's ending reveals his real name is David (デイビッド, Deibiddo?). </P> <P> Metal Gear Solid 2: Sons of Liberty shows Solid Snake as the playable character during the game's extensive prologue sequence in which he is sent by Otacon's anti-proliferation organization Philanthropy to infiltrate a cargo tanker and photograph Metal Gear RAY . During the operation, however, RAY is hijacked and the tanker destroyed, with Snake apparently dead and framed for the deed . During the game's main portion, Solidus Snake steals Snake's identity, and leads the "Sons of Liberty" (consisting of Revolver Ocelot, Fortune, Fatman, Vamp and Olga Gurlukovich) while Snake himself uses the pseudonym Iroquois Pliskin (イロコィ ・ プリスキン, Irokoi Purisukin) as a non-playable character who assists rookie agent Raiden through the remote offshore Big Shell facility and in taking down Solidus and RAY while also learning about the Patriots . </P> <P> The Metal Gear Solid prequels alludes to Solid Snake's existence; Metal Gear Solid: Portable Ops has him briefly alluded in a prophetic vision as Naked Snake's "son (that) will save the world" (after either Liquid or Solidus as Big Boss's "son (that) will bring the world to ruin"), and Metal Gear Solid: Peace Walker shows Kazuhira Miller mentioning the "twin sons" that are two years old at the time . </P>

Genetic father of solid snake from the game series metal gear