Tekken Tag Tournament (鉄拳タッグトーナメントTekken Taggu Tōnamento?, lit. Iron Fist Tag Tournament) is the fourth installment in the Tekken fighting game series and a spin-off of the main series, focusing on tag team battles.
It is not canonical to the Tekken storyline. The game was originally available as an update kit for Tekken 3, running on the same System 12 arcade board. Tekken Tag Tournament was first released on arcades in 1999.
It was ported to the PlayStation 2 home console in 2000 (released as a launch title outside Japan), though the PS2 version ran on an enhanced game engine with better graphics, which allowed the characters and stages to appear less angular and more detailed compared to how they used to look in the PS1 Tekken trilogy.
The game combines most characters found in both Tekken 3 and Tekken 2. The game received a sequel 12 years later, Tekken Tag Tournament 2, as well as a remastered for PlayStation 3 version entitled Tekken Tag Tournament HD. Tekken Tag Tournament is a non-canon game, having no storyline. According to Namco, it brought back the characters that did not return to Tekken 3: Baek Doo San, Bruce Irvin, Jun Kazama, and Kunimitsu. Their ages are unchanged from the previous Tekken games. It is more of a compilation of the Tekken series giving fans the opportunity to play as almost every character in the series up to that point, including many of those that had apparently been killed off in the main Tekken storyline.
Of all the returning characters, Kazuya Mishima was the most heavily promoted, as he was featured prominently on the game's cover art and promotional material.
Tekken Tag Tournament was notable for having the largest character roster in the series up to that point, boasting a total of 39 playable characters.
37 characters return from previous installments in the series, and two new characters, Tetsujin, a costume swap of Mokujin, and Unknown, the boss character in this game, were introduced.