For the time line I will start from the creation of the Philosophers to Naked Sin and Naked Son incident.
1918 - The Philosophers, an organization that aim to control everything (economics, power, politics), is created by the joined forces of Russian, China and USA.
1939 - The Philosophers created a Philosophers legacy which contain money of one hundred billion dollars and name of the secret member of the organization.
1962 - CIA created a unit FOX (Force Operation X) led by major Zero
Maj.Zero
FOX unit's logo
1964 - US sent the best agent of FOX unit "The Boss" into Russia to find Philosopher's Legacy
The Boss
(Snake's mentor : Known as "The Joy" in cobra unit)
1964 - Mission Virtuous : US sent Naked Snake into Russia to recover Sokolov and destroy Shagohod.
Naked Snake
The Shagohod
1964 - Operation Snake Eater : After nuclear attack set up by Colonel Volgin, The Boss declare defected to Russia. Snake was sent in to eliminate Colonel Volgin and The Boss. After the mission Snake receive a title "Big Boss".
*Snake met ocelot and EVA. Later he lost his right eye in the mission.
Revolver "Shalashaska" Ocelot
(The Boss's son also known as "Adam")
EVA
(Chinese People's Liberation Army's agent)
1964 - Big Boss left unit FOX
1965 - FOX led by new leader "Gene" under codename "Viper"
1966 - Big Boss, as a mercenary, met Frank Jaeger a young boy soldier.
1966 - Frank Jaeger taken by CIA as a super soldier test subject, brainwashed and given codename "Null"
1970 - San Hieronymo Incident : FOX, now led by gene, was turn into renegade group. Also Big boss have encounter with Null, who was brainwashed but in the end he was able to regain his memories.
1970 - Big Boss and Roy Campbell form a unit FOXHOUND
FOXHOUND unit's logo
Viper
(Gene)
Null
(Frank Jaeger)
1970 - After San Hieronymo Incident Big Boss rejoined FOX unit.
1970 - The Philosopher was reorganized as "The Patriots" by Big Boss, Ocelot and Major Zero. By using the Philosopher's Legacy ocelot obtain. The goal is to fulfill The Boss's dream of create an unified world.
1972 - Les Enfants Terrible : A project to clone the legendary soldier "Big Boss". The twin snake "Liquid Snake(Eli)" and "Solid Snake(David)" was born as imperfect clone by have EVA as surrogate mother. Later the third clone was born after as "Solidus Snake(George Sears)".
1972 - Big Boss leave The Patriots. Major Zero rename the organization "Cipher".
1972 -Big Boss form a mercenary group Militaires Sans Frontieres that provide force for who ever need them regardless of nation or ideologies.
Militaires Sans Frontieres's logo
1974 - Peace Walker Incident : Militaires Sans Frintieres was asked by Costa Rican forces represented by "Ramon Galvez Mena" and his student "Paz Ortega Andrade" to repel an unknown armed force that reveal as Peace Sentinel, a mercenary created by CIA. After Metal Gear Peace Walker were destroy by it's own AI that replicate "The Boss" created by Dr.Strangelove. Paz took Metal Gear ZEKE and reveal herself working with Cipher. The Metal Gear ZEKE was shot down and Paz fell into the ocean and assume KIA.
* At this point Big Boss has already met "Benedict Kazuhira Miller" and have him as his subcommander.
Benedict Kazuhira Miller
(Militaires Sans Frontieres's Subcommander)
Ramon Galvez Mena
(KGB agent, real name:Vladimir Aleksandrovich Zadornov)
Paz Ortega Andrade
(Cipher agent, real name : Pacifica Ocean)
Dr.Strangelove
Metal Gear Basilisk
(Peace Walker)
Metal Gear ZEKE
1975 - XOF Trojan Horse Operation : Some time after the Peace Walker incident. Big Boss learned that Paz wasn't dead and been captured at camp omega in Cuba. Chico went to rescue Paz by himself so big boss went in and rescue both of them. When Big Boss have rescued both Chico and Paz, and remove a bomb from Paz's guts, and about to arrive at base he found out that XOF a unit led by Skull face had destroy the Militares Sans Frontieres base while big boss was on a mission by the order from Cipher. While Big Boss and remaining agent escape Paz gain conscious and told Big boss that there's another bomb inside her then jump down from helicopter, the impact from explosion crash the helicopter. Big boss was in the coma for 9 years.
Big Boss (1975)
Chico
Paz Ortega Andrade (1975)
Skullface
(XOF unit Commander)
XOF unit's logo
1984 - 26 febuary Venom Snake gain conscious and acknowledge his lost of left arm.
1984 - Hospital Escape : March 11, Cipher sent in some unit to kill Big Boss (include "Quiet"), but he escaped with the aid of man named "Ishmael". Quiet got injured and received parasite therapy.
1984 - Venom Snake join the Diamond Dogs as a new commander. And start his revenge against the Cipher and XOF with the aid from Ocelot and Kazuhira Miller
1984 - Venom Snake rescue Kazuhira Miller from Afghanistan, 10 day after he recovered.
1984 - Venom Snake encounter "Quiet", a female sniper whom attempt to assassinate him at the hospital, while on a way to extract Dr.Huey Emmerich.
1984 - At some point in the year Snake met "Eli" (AKA White Mamba) in Masa Village
1984 - Quiet died by vocal chord parasite, sacrifice herself to save Snake.
1984 - Snake come to contact with skullface, finally get his revenge and retrieved Metal Gear Sahelantropus.
Diamond Dogs unit's logo
Punished "Venom" Snake (1984)
Revolver "Shalashaska" Ocelot (1984)
Benedict "Kazuhira" Miller (1984)
Quiet
(Female Sniper, Former XOF agent)
Huey Emmerich
(Scientist who create Metal Gear Sahelantropus)
White Mamba
(Eli, Liquid Snake)
Metal Gear Sahelanthropus
1990 - Gulf War Begin
1991 - Eli(Liquid Snake) and David(Solid Snake) are sent to battle field
1991 - Big Boss return to FOXHOUND as a commander with out US government's acknowledge.
1995 - Big Boss establishes the fortified military nation "Outer Heaven".
1995 - Operation Intrude 312 : Grey Fox (Frank Jaeger) was sent in and was captured.
1995 - Operation Intrude 313 : Solid Snake, a rookie agent at that time, was sent in to rescue Gray Fox and destroy Metal Gear TX-55. In the end the fact that the one who behind Outer Heaven "Big Boss" was revealed, Solid Snake killed him. Roy Campbell replace Big Boss's place in FOXHOUND.
Solid Snake (David)
Metal Gear TX-55
1997 - Big Boss freed Zanzibar Land from Russia.
1999 - Zanzibar Land Disturbance : Solid Snake encounter Grey Fox, now as an enemy,destroy Metal Gear D and kill him. At the end snake encounter Big Boss again and kill him, but The Patriots revive and conceal his camatose body.
Solid Snake (1999)
Big Boss (1999)
Grey Fox (1999)
Metal Gear D
2000 - Roy Campbell leaves FOXHOUND, Liquid Snake joined and take control of the unit.
2005 - Shadow Moses Incident : Solid Snake was called by US military to infiltrate Shadow Moses island that was taken by FOXHOUND unit that led by Liquid Snake.
2005 - Solid Snake fight against Ocelot, at the end of the fight Ocelot's right arm was cut-off by Cyborg Ninja (Grey Fox)
2005 - Solid Snake met Hal Emmerich (Huey and Strangelove's son)
2005 - Solid Snake learned about Les Enfants Terrible from his twin brother Liquid Snake.
2005 -Liquid Snake killed Cyborg Ninja with Metal Gear REX
2005 - Solid Snake defeat Liquid Snake alond with the Metal Gear REX
2005 - Liquid Snake died by FOXDIE virus
2005 - Ocelot reveal US president identity "George Sears" AKA "Solidus Snake"
Solid Snake (2005)
Cyborg Ninja
(Grey Fox)
Liquid Snake (2005)
Ocelot (2005)
Hal Emmerich
(AKA Otacon, Huey's Son)
Metal Gear REX
2005 - Solid Snake and Hal Emmerich (Otacon) established Philanthrophy, an anti-Metal Gear NGO
2006 - Ocelot implant Liquid's right arm.
2007 - Manhattan Tanker Incident : August 8, Tanker incident was the armed takeover and subsequent sinking of USS Discover by The Patriot to retreive Metal Gear Ray prototype. Solid Snake was frame as a terrorist.
Solid Snake (2007)
Metal Gear RAY
2007 - After Ocelot,after his consciousness was taken over by Liquid's cell, got away with Metal Gear Ray, Solid Snake was blamed so he fake his death by using Liquid's Body and change his name to "Iroquois Pliskin".
Ocelot (2007)
2009 - Big Shell Incident : After Solid Snake's,fake ,death, new FOXHOUND recruit "Snake", later his name was change during mission as "Raiden", was sent to infiltrate a decontamination facility "Big Shell" with the help of "Pliskin" after it was seized by terrorist group "Sons of Liberty" led by Solidus Snake.
Solid Snake as Pliskin (2009)
Raiden
(New Snake)
Solidus Snkae
(George Sears)
2009 - Raiden learn about Solidus Snake was his foster father and he killed his parent. Later he killed Solidus Snake
2011 - The Patriots finished develop an arsenal gunship, later stolen by Ocelot and renamed "Outer Haven". Ocelot hid it at Shadow Moses Island.
2014 - Ocelot was fully controlled by Liquid. Being known as Liquid Ocelot. Solid Snake start to age really fast, and called "Old Snake".
Solid Snake (2014) AKA Old Snake
Liquid Ocelot (2014)
2014 - Liquid Ocelot Controlled the world's largest PMC "Outer Heaven" a combined of five PMCs.
2014 - Liquid Ocelot's Insurrection : Liquid's plan to remove power from The Patriot
2014 - Liqiud Sun : Liquid's movement in Middle East with Praying Mantis PMC. Snake was sent in to eliminate Liquid, but failed.
2014 - Solid Sun : Liquid's movement in South America with Pieuvre Armement PMC. Snake was sent in to rescue Dr.Naomi Hunter(Grey Fox's adopted sister) and success with the help of cyborg ninja who reveal to be Raiden.
Naomi Hunter (2014)
Raiden (2014)
2014 - Third Sun : Liquid's movement in Eastern Europe with Raven Sword PMC. Snake's mission is to locate and prevent Liquid to gain Big Boss's body that was held by Paradise Lost Army led by "Big Mama"or snake's surrogate mother "EVA", but failed. After Liquid gain Big Boss's body(but actually took the decoy, Solidus Snake's body),he shut down all PMCs excluding his own via "Sons of the Patriots", an advanced battlefield control system that control all nano-machines that used by PMC. Big Mama died in this incident.
EVA (2014)
2014 - Twin Sun : Liquid's movement on Shadow Moses Island with Werewolf PMC. Snake was sent in to prevent Liquid from gaining Metal Gear REX's rail gun. At the end Snake have a mech fight with Liquid. Snake pilot Metal Gear REX and Liquid Pilot Metal Gear RAY. Both injured severely but Liquid had escaped with the Outer Haven.
2014 - Old Sun : Final moment of Liquid's Insurrection, Liquid Ocelot attempt to destroy The Patriot's core AI. Snake volunteer to plant a FOXALIVE virus in the Outer Haven's "GW(George Washington)" AI to stop rail gun from shooting The Patriots's core AI "JD(John Doe)" by going through the microwave defence system. But the outcome is after shut down the GW, all of The Patriot's system also went down and destroy all AI and nano-machines in the world. Later Liquid and Snake had the last fight on the roof top of Outer Haven. Liquid Ocelot died.
2014 - Naked Sin and Naked Son : Snake visit Big Boss's grave with only 1 year left to live. Attempting suicide but interrupted by a man pushing another man one wheelchair that approach him. The man was Big Boss and Major Zero on the wheelchair. Big Boss explain about Solidus's body that Liquid used instead of his body works because he was his perfect clone. He continued to explain that Zero let the AI take control The Patriot, which led the world being dependent on war economy. Then he close the oxygen tank that keep zero alive, killing him. Then he salute The Boss's Grave one last time and share his last Cigarette with snake, then passed away in Snake's arm.
Big Boss (2014)
Maj.Zero (2014)
*Naked Sin and Naked Son hold the world record of The longest cut-scene in video game at 27 minutes.
The End of the Legendary Soldier