Navigate to the Binaries/Win64 subfolder (standard for Unreal Engine 4 games).
Once extraction is complete, open the newly created folder (usually named Postal 4 No Regerts ). Run the Game: Postal.4.No.Regerts.v1.1.0.part1.rar
Ensure Postal.4.No.Regerts.v1.1.0.part1.rar and all subsequent parts (part2, part3, etc.) are in the same folder . Postal.4.No.Regerts.v1.1.0.part1.rar
If the game won't launch, ensure you have the DirectX End-User Runtimes and Visual C++ Redistributables installed. These are usually found in a _Redist or CommonRedist folder within the game files. Postal.4.No.Regerts.v1.1.0.part1.rar
This means one of the parts (e.g., part 2 or 3) didn't download completely. You will need to re-download the specific part mentioned in the error message.
Use a modern extraction tool like 7-Zip (recommended) or WinRAR .