It contained various balance changes to characters of the original game.
Tekken 5.1 was a minor upgrade patch of the original Tekken 5 that was not released on consoles and instead, was only on arcades. The game features 32 playable characters, the fourth largest amount of playable characters in a Tekken game, Tekken 5: Dark Resurrection has 35 characters, the third largest amount, Tekken Tag Tournament has 39 characters, the second largest amount and Tekken 6 has 40 characters, the largest amount (42 in Tekken 6: Bloodline Rebellion, which will also be in place of Tekken 6 for Xbox 360 and Playstation 3) The game is credited for taking the series back to its roots.
It was released for Arcades in North America in December 2004, and was released on the PlayStation 2 on Febru(United States), Ma(Japan), and J(European Union).
