On January 29, 2024, the Steam version of Postal III received a large content update adding various features and improvements originally made by the developers of the Zoom Platform version of the game as well as fixes and content by the series' fan community. The update notably included streamlined mod support, a high quality release of the official soundtrack, several bug and graphical fixes pointed out and contributed by players, updated versions of the game's official German and Japanese localizations, three new localizations in Portuguese/Brazilian, French and Polish translated by fans, and worldwide access to the previously Russian-only Fart Gun DLC.