Super Smash Bros. (ニンテンドウオールスター! 大乱闘スマッシュブラザーズ), Nintendo All-Star! Great Fray Smash Brothers), often shortened to "SSB", retronymously "Smash 64" or "SSB64", is the first game of the Super Smash Bros. series. As a relatively low-budget game with an unusual concept, there were not originally any plans to export the game outside Japan. Only the game's unexpected popularity led to its worldwide release. It is the only Super Smash Bros. game to be rated E, as Melee and Brawl are rated T, and Smash 4 is rated E10+, according to the ESRB.

The game was released in Japan on January 21, 1999, in North America on April 26, 1999, and in Europe on November 19, 1999. The game is playable on Nintendo 64 and the iQue Player, and is available on the Wii's Virtual Consoles. The Virtual Console version was released on January 20, 2009 in Japan, one day before the 10-year anniversary of the game, and later released on June 12th 2009 and December 21, 2009 in Europe and North America, respectively.