While there is no official, standalone "full version" release of for PC from Bandai Namco, you can play the full game on your computer using a PlayStation 2 (PS2) emulator. How to Play Tekken 4 on PC
: The most reliable and popular choice is PCSX2 . It is a free, open-source emulator that allows you to play PS2 games in high definition with modern controller support. tekken-4-game-free-download-for-pc-full-version
To play Tekken 4, you must use software that simulates the PS2 hardware on your Windows or Linux system. While there is no official, standalone "full version"