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Metal Gear franchise creator, Hideo Kojima, started off his franchise with the first Metal Gear for the MSX2 computer in 1987, as a pastiche of high-profile action movies at the time, such as Lethal Weapon and Escape from New York. Kojima's main character for the game, codenamed Solid Snake, was likewise inspired by the heroes from those action movies, such as Kyle Reese (played by Michael Biehn) from The Terminator, whom Snake's first portrait was based on. Snake's name, in fact, was derived from Escape from New York's main character, Snake Plissken (Kurt Russell). When Metal Gear was ported to the NES, it sold well enough that Snake subsequently appeared in the sequel, Metal Gear 2: Solid Snake. The character underwent an eight-year hiatus, until the release of the seminal Metal Gear Solid for Sony PlayStation in 1998, which fully established Solid Snake in his more popular, modern-day character design, which was made by artist, Yoji Shinkawa (see his above artwork). Shinkawa's Snake design features a dark grey bandanna, a consistent "sneaking suit", and the effective voicework of Akio Ohtsuka for Japanese versions and David Hayter for English versions of Metal Gear games as Snake's defining aspects. Metal Gear Solid proved to be a huge success, as it would skyrocket the stealth genre to popular heights in gaming.
In the Super Smash Flash series
In Super Smash Flash 2
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The original source that confirmed the subject has otherwise become obsolete, outdated or deprecated and has yet to be reconfirmed by an official modern source.
Snake was previously confirmed in Super Smash Flash 2 as part of the initial roster for the game. However, following the release of v0.7 of the SSF2 Demo, the developers revamped the whole roster in order to accommodate some new, unexpected characters. Currently, Snake's fate as a playable character is unknown. His initial trailer can be seen to the right.
Snake is the only currently unconfirmed character for SSF2 to have received a Mini-Trailer, which is now private.