The release year. This is crucial to differentiate it from the 2002 original ( xXx ) or the 2017 soft reboot ( xXx: Return of Xander Cage ).
However, the film found a second life on home video, pay TV, and—most importantly—the early torrent and file-sharing ecosystem. xXx.State.Of.The.Union.-2005-.480p.Dual.Audio.-...
This is the core film title. The use of periods instead of spaces is standard for file systems and scene release naming conventions. The release year