* ' – an official expansion, which adds PvP multiplayer and two new areas to the single player.
* ' – an official expansion continuing after ending of the base game.
* ' – an official piece of DLC for the Steam version of Postal 2. It tells of the Postal Dude's adventures after Apocalypse Weekend, and retconsPostal III, referring to it as a "horrible vision of a future gone wrong."
Postal III – the sequel to Postal 2, developed by Trashmasters in cooperation with Running with Scissors and published by Akella, firstly introducing a third-person perspective. Upon release, the game was panned by critics and fans of the series, because of which Running with Scissors retrospectively considers the game to not fit in the general image of the series, saying "We don't regard it as the third Postal game, just a dodgy spin-off that should never have happened."
Postal Redux – a remake of the original Postal, featuring renewed textures and multiple changes made to adapt it to modern games.
' - described by Running with Scissors as the "true sequel" to Postal 2. The game was announced and released on October 14, 2019, as an early access game.
Spin-offs
– an official spin-off and expansion to Postal 2, developed by Avalon Style Entertainment and published by Akella. The plot concerns a man named Corkscrew, who wakes up in an asylum to find that his penis has somehow been amputated and goes on a mission to find it.
Postal Babes – a mobile video game spin-off developed and published by HeroCraft. It tells the story of two "Postal Babes" who must rescue hostages from their local university which has been taken over.
Postal Mobile – a mobile video game developed by Ministry of Fun and published by GlobalFun. It tells the story of the Postal Dude who has to fight his way through a town filled with corrupt police officers and street thugs in order to retrieve his stolen car.
Film
A film adaptation of the Postal series was directed and co-written by Uwe Boll. Though the film shares the title of the first Postalvideo game, it is more heavily drawn from the sequel, Postal 2. New characters are introduced in the film, such as Faith, a young barista who joins the Postal Dude in his adventure, and former U.S. president George W. Bush.
Books
Two books were published only in Russia. In 2011 published book Postal. Реальный Чувак, which was written by Andrei Shlyachov and published by AST. In 2012 published book Postal. Чувак и надувная свобода, which was written by Igor Gradov and published by AST. A book based on the first Postal game in the series, named after the game's expansion pack, Postal: Special Delivery, was written by Alisa Bogodarova and published on October 29, 2015 by Publish Green in the form of an Amazon KindleeBook. The book retells the game's story and the various events leading up to it and introduces several new characters including the Postal Dude's high school friends and teachers as well as original fantasy characters. On April 15, 2020 was published documentary book about franchise Postal - Postal, written by Brock Wilbur and Nathan Rabin, which included interview with Vince Desi and Mike Jaret.
