The arcade and console versions of Tekken Tag Tournament differ slightly. The arcade version ran on a 32-bit engine, utilizing the graphics engine of Tekken 3. These graphics ran 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, yet 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.