* DoingItForTheArt: This game was made after one of the developers of ''VideoGame/SnakesRevenge'' told Creator/HideoKojima that he should make a true ''VideoGame/MetalGear'' sequel, and the game was released at a time when the {{MSX}}2 was practically dead as a gaming platform.
* NoExportForYou: [[SequelFirst Until]] [[EmbeddedPrecursor its inclusion in]] ''Metal Gear Solid 3: Subsistence''.
* SequelFirst: The original ''VideoGame/MetalGearSolid'' included a plot synopsis of this and its [[VideoGame/MetalGear predecessor]] in order to give newcomers to the series a bit of a background.
* WhatCouldHaveBeen:
** One of Kojima's early plot ideas for ''Metal Gear 2'' involved a terrorist takeover of a nuclear weapons testing site within the United States. This idea would later recycled for the first ''Metal Gear Solid''.
** Two other vehicular bosses were planned in addition to the Hind D and Metal Gear D. The Goliath (a tank) and Metal Gear Gustav (a smaller non-nuclear armed model of Metal Gear). There are actually various Goliath tanks inside Zanzibar Building in the final version, but they're just part of the scenery.
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