using the Tekken 3 PCB board, based on the PlayStation hardware. The console version ran on a highly updated engine, utilizing the PlayStation 2's graphics processor. The game does not run on a 32-bit engine, instead running on a new and updated engine highly similar to that found on Tekken 4. The background designs and BGMs differed too, as the console version has new updated tracks, while the arcade version was based on MIDI tracks with an instrumental backing. Unknown is not playable on the arcade version, yet the character is on the PlayStation 2 version. The arcade version also allows players to only select the alternative colors that have been added to the costumes at first, while the normally colored ones are unlocked when the bonus characters are. There are also crucial differences concerning the playability of the characters, as some moves or attacks are much more efficient in the arcade version than in the console version and vice versa. If Unknown is chosen in the arcade version of Tekken Tag Tournament even though the stages were at random, all of those 8 stages were always Unknown. Completing arcade mode as Unknown goes straight to the credits. Characters As the game was made to be a compilation of previous games, the game includes nearly every character from the original Tekken up to Tekken 3, including those who were canonically missing in the current canonical game Tekken 3. All of them have improved appearance and movesets to make them on par with the Tekken 3 characters. Additionally, the game adds two new characters, both of them being mimic characters: Tetsujin and Unknown. Unknown also serves as the final boss of the game. Both characters seldom appear in future games, with Unknown resuming her role as final boss in the sequel Tekken Tag Tournament 2, while Tetsujin is featured as a boss in the free-to-play Tekken Revolution and the mobile game Tekken. The only absent characters in the game that were playable in previous entries of the series are the original Jack, the first King, the first Kuma, Marshall Law, Dr. Bosconovitch, and Gon (he is a guest character in Tekken 3 and didn't appear in this game and any future games due to Namco's contract to have Gon present was only for Tekken 3 at that time). New characters Tetsujin : A metallic version of Mokujin. Unknown : A mysterious