Because the game was exclusively built for consoles and arcades, there are no official digital distribution platforms—such as Steam, the Epic Games Store, or GOG—that sell or host Tekken 6. Consequently, any website claiming to sell a "Tekken 6 PC activation serial," "Tekken 6 Steam key," or "PC license key generator" is misleading. The Dangers of Fake PC License Key Generators

Which version of the game do you prefer to play ( graphics)? What type of controller do you plan to use?

Searching for "Tekken 6 license key for pc game" often leads to websites offering free key generators or "keygen" tools. These are almost exclusively malicious.