Solid Snake

As an artificially engineered human, Solid Snake's lifespan was predesignated through telomere and gene modification. As part of the Les Enfants Terribles Project, he was engineered to be short-lived to prevent enemy forces from copying his genetic code.

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Solid Snake's accelerated aging also brought about a change in the FOXDIE virus within him.

Damage to the victim targeting receptor was on the verge of yielding a mutant form of FOXDIE capable of killing indiscriminately. The time limit until that mutant form arose was three months. After that period, Snake would become a walking weapon of mass destruction. Furthermore, another new FOXDIE strain was discovered within his body.

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But ironically, the new FOXDIE virus, injected into Snake by Drebin, eliminated the mutant FOXDIE. It was by becoming a vector for the new FOXDIE strain that Snake avoided becoming a weapon of mass destruction.

ATGC
Alaska
Anti-Snake Soldier
Antifreeze Glycopeptide
BB Corps (MGS4)
Big Boss
Black Project
Bomb Blast Suit
Bomb Sensor
Bombing of Outer Heaven
Brainwashing
Button Camera
CQC
Camouflage Mat
Cardboard Box
Caribou
Cigarette
Clone
Codename "SNAKE"
Cursed Children of the Snake
Cyborg Ninja
DIA
Decoy Octopus
Deepthroat
Diane
Diversion
Donald Anderson
Drebin (MGS4)
EVA
Ellen Madnar
FOXDIE
FOXHOUND
Fortune
Fulton Recovery System
GSG9
Gaudi (MGS4)
George Sears
Gray Fox
Gulf War
Gustava Heffner
Hal Emmerich
High-Frequency Blade
Infinity Bandanna
Iroquois Pliskin
Jennifer
Jim Houseman
Kenneth Baker
Les Enfants Terribles Project
Liquid Snake
Liquid Snake's Right Arm
Little Gray (MGS4)
Logistical Support Team for Shadow Moses Island Incident
MSX2
Master Miller
Mei Ling
Meryl Silverburgh
Metal Gear (TX-55)
Metal Gear Mk. II (MGS4)
Metal Gear Mk. III (MGS4)
Metal Gear REX
Musher
Mutated FOXDIE (MGS4)
Muzzle Blast
Naked Snake
Nanomachine
Nanomachine Inhibitor (MGS4)
Naomi Hunter
Natasha Romanenko
New FOXDIE (MGS4)
New Outer Heaven
Ocelot
Old Snake (MGS4)
Olga Gurlukovich
Operation Intrude F014
Operation Intrude N313
Operation Snake Eater
Otaku
Outer Heaven
Outer Heaven Uprising
PAL
Parachute
Pettrovich Madnar
Philanthropy
Psycho Mantis
Python
ROM Cartridge
Raiden
Rat Patrol Team 01 (MGS4)
Rosemary
Roy Campbell
SDV (Midget Submarine)
Shadow Moses Incident
Shadow Moses Island
Snatcher Project
Sneaking Suit
Sniper Wolf
Solid Snake Simulation
Solidus Snake
Stockholm Syndrome
Sunny's Chickens (MGS4)
Tanker Sinking
Tap Code
The Boss
The Man in the Cardboard Box
The Watergate Scandal
Threat Ring (MGS4)
Truth Behind Shadow Moses Incident
United States Army Soldier Systems Center
Vamp
Volgin
Vulcan Raven
Wolf's Scarf
Wolfdog (MGS4)
Women's Bathroom
Zanzibarland Disturbance
Zanzibarland Snake