If you need to back up your saves or move them, they are typically found in the LocalLow folder within your Windows AppData directory (PCGamingWiki).
Don't forget your biological weapons. You can use them to confuse, freeze, or even burn enemies depending on the power-ups you find. postal-brain-damaged-installation-tutorial
After the first launch, you may want to tweak these settings for the best experience: If you need to back up your saves
Download the setup files from your GOG account . Run the .exe and follow the prompts. You can select your language under Options before the installation begins. 🔧 Essential Configuration postal-brain-damaged-installation-tutorial
If the game starts in the wrong language, GOG users can find a Language_setup.exe in the game's root directory to manually change it.