Websites claiming to offer a "Tekken 8 APK OBB free download" are typically distributing unofficial, non-functional, or malicious files.
Most "Tekken 8 mobile" files are actually older games (like Tekken 6 or Tekken 3) modified with skins, or entirely different apps disguised with Tekken 8 icons. tekken 8 apk obb free
While there is no direct app to install, you can play the official version on your phone through or remote play services: Websites claiming to offer a "Tekken 8 APK