POSTAL 4: No Regerts – continuation of the cult project in the first-person shooter genre. The fourth part of the adventures of a character named Dude was again being developed by Running with Scissors, after the unsuccessful third part from another studio. It was RwS who were the creators of the original idea and the first two projects that gave the franchise fame. It became popular due to its satirical and black humor on topical topics, as well as due to the high level of violence. Postal 4 is structurally reminiscent of the first parts, the campaign is divided by days of the week, which start like for ordinary people, but quite quickly everything does not go according to plan. This leads to numerous mass shootings, the gamer is constantly in the minority due to the fact that opponents prefer to attack in groups.

The events take place in the deserts of Arizona, where the main character was forced to move after the total destruction of Paradise. The Dude is accompanied by his faithful dog named Champ, who is also involved in some missions along the way. The adventures of the virtual protégé begin after finding the city of Edensin, which happened immediately after the main character was robbed and his car was taken with all the goods that he managed to take with him when moving.

The game world is represented by a huge territory, completely open for exploration at any time. The map displays all the necessary marks, making it easier to navigate the environment. In addition to the main quests noted in the Dude's separate list, Postal 4 has many side quests that give valuable items, for example, new types of weapons, grenades, cat silencers, and so on.