Tekken 4 (鉄拳4) is a 2001 fighting game developed and published by Namco for arcades. Initially released for Namco's System 246 hardware, it was then ported to the PlayStation 2 home console in 2002. As the fourth main installment in the Tekken series following Tekken 3 (1997), and the fifth overall following the non-canon title Tekken Tag Tournament (1999), the game harbored many gameplay revisions, such as the series-unique ability for the player to move about before the round begins and the introduction of walled stages.