Released in June 1999.
The title of this game translates from Japanese as 'Iron Fist Tag Tournament'.
This game has a tag play system (i.e. : one player can play select a team of two players) and then during a match he can tag their characters at any time, provided they aren't in the air being juggled ;). Unlike the other Tekken games, this episode has no specific storyline and the main idea behind the game was to create a game which has all the characters from Tekken 2 and Tekken 3 plus a few new characters, Tetsujin and Unknown. Tetsujin is a metallic form of Mokujin and is selected with button 1. Tetsujin will become gold if you get 10 wins in a row. Unknown is the end character, complete with a wolf, and cannot be selected on the arcade version. Tekken Tag Tournament has a total of 38 characters. When the machine is turned on for the first time, by default only 20 characters are playable. The rest of the characters are released one by one after specific time. The characters can be tagged by pressing button 5.
In the Sound FX there is the announcer voice for Doctor Boskonovitch, Doctor Abel, Devil Kazuya and Marshall Law meaning these characters could have been in the game but weren't added to the final version. Since Devil Kazuya and Marshall Law are identical to Kazuya and Forest Law respectively there was no reason to add the same characters twice. Dr. Abel was an evil scientist who re-animated Bryan for Tekken 3 and was never in any game at all. For Boskonovitch, who would want to play as him on a coin operated game anyway!
When Tetsujin/Mokujin was updated for Tekken Tag, they forgot to add moves for Roger. This was fixed in "Tekken 5
Anna plays the same as on Tekken 3 (Sony PlayStation) and not the arcade where she was a gfx swap of Nina.
Bandai Music Entertainment released a limited-edition soundtrack album for this game (Tekken Tag Tournament Original Soundtrack - APCG-4046) on 21/09/1999.
Tekken Tag Tournament can clearly be heard in the 2003 movie PTU. Characters heard fighting are Hwoarang and Wang.