Hal Emmerich has an affair with his stepmother, Julie Danziger, which Emma Emmerich briefly witnesses. Huey Emmerich learns of the affair, and later commits suicide by drowning himself in the family pool, almost taking Emma with him. The death is reported as an accident, and Emma develops a severe fear of water. Hal, out of guilt, leaves his family.
The United Nations authorize coalition forces launches Operation Desert Storm against Iraq during the Gulf War. The U.S. Army injects its troops with "soldier genes", identified from the study of Big Boss's DNA, as part of the Genome Soldier project, developed by Dr. Clark. The side effects of these injections are disguised as the Gulf War Syndrome. The Pentagon publishes a study claiming that the Gulf War Syndrome was caused by exposure to depleted uranium anti-tank rounds, to cover up the project.
The sewers of the Guadalajara downtown district of Analco explodes, leaving 252 casualties, over 500 injured, 15,000 left homeless, and thousands of homes ruined. Four PENEX workers were charged with negligence as a result.
The Patriots develop a computer program to control information deemed inconvenient to the organization. It is submitted to every military center and civilian computers, the latter via an OS program, under the guise of counteracting the supposed effects of the Y2K bug.
^The manual for Metal Gear 2: Solid Snake, which was written in 1990, details fictional events that occur throughout the 1990s. These include the signing of weapons treaties, the development of advanced technology, and the financial growth of Asian countries. Since these events have not been shown to contradict events in later games, and considering that the Metal Gear universe often diverges from reality, they are included in the timeline. The manual also contained events which are now deemed non-canon, such as the complete abandonment of "strategic" nuclear weapons (i.e. ICBMs), and the treaties involved with them, since later games reveal that START 2 and 3 were signed to deal with these, similar to the real world.
^In both the original and re-released versions of Metal Gear 2, Solid Snake mentions that he wanted to end the nightmares he was having for the past three years, due to the date in which the first Metal Gear that was destroyed by him originally occurred in 1996. However, later games and sources establish that the entirety of the Outer Heaven Uprising, including Solid Snake's infiltration mission into Outer Heaven, was done in 1995.
^ abcdefghMetal Gear Solid 2: Sons of Liberty, Konami Computer Entertainment Japan (2001).
^ abMetal Gear Solid 2: Sons of Liberty, Konami Computer Entertainment Japan (2001). Solid Snake: When was the last time you saw [Emma]? // Otacon: Over 10 years ago [as of 2007].
^ abcdMetal Gear Solid 4: Guns of the Patriots, Kojima Productions (2008).
^Metal Gear Solid 2: Sons of Liberty, Konami Computer Entertainment Japan (2001). Otacon: I didn't... I didn't leave you.[sic] ...because of the accident. I had... I had a relationship with your mother. She seduced me... and it went on... My father's death... was no accident. He took his own life... It was my fault. All my fault. Forgive me, Emma...
^Metal Gear Solid 2: Sons of Liberty (script), Konami Computer Entertainment Japan (2001). Otacon: You could see the pool from my room... but I didn’t realize at the time that she needed my help. // Raiden: What were you doing? // Otacon: I... I was... // [Actually Emma saw what was going on before she almost drowned.]
^Metal Gear 2: Solid Snake, Konami Corporation (1990). Solid Snake: What are you saying, Schneider? // Kyle Schneider: ...Snake, after you destroyed Metal Gear, NATO launched a massive bombing campaign against Outer Heaven. All of us Resistance fighters...and the children of Outer Heaven...they didn't care about any of us. There was no escape from the flames... They died like animals in a cage. // Snake: I... can't believe this... // Schneider: Think about it. The children of Outer Heaven were originally orphans and refugees from all over the world. They were a liability... and NATO didn't want to deal with them... // Snake: ...No... // Schneider: You're no different. They'll forget about you, too... But he wasn't like them... // Snake: Who...? // Schnider: He came... and saved us from annihilation. He forgave us for what we'd done. He gave us a new land to call home... A new family... // Snake: He did...? You mean... // Schneider: Snake, you'll understand soon... what a wonderful man [Big Boss] is...
^Metal Gear Solid (ending), Konami Computer Entertainment Japan (1998).
^Metal Gear 2: Solid Snake, Konami Corporation (1990). Holly White: I infiltrated Zanzibar Land a month ago, posing as a journalist.