[System Requirements]
-OS: Windows 7 / Vista / XP
-Processor: 3.0 Ghz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher)
-Memory: 1GP XP/2GB Vista
-Hard Disk Space: 13.5 GB
-Video Card: Video card must 128MB or more and should be a DirectX 9 –compatible with support for Pixel Shaders
-DirectX®: 9.0c
-Sound: DirectX 9.0c Compatible

Hướng dẫn cài đặt
Trích:

EXTRACT USE [7-ZIP]
-Mở foder "P3.P_v1.0"
-Use the "keygen.exe" + "p3.mini.image.isz" To Unlock the Game (Info + Screen|Help Included)
-RUN the "p3"[EXE] to Play
-OR RUN the "Postal 3"[ShortCut] to Play
=When Running the ShortCut Make sure you find NEW Location to the p3.exe This is Auto On XP then Click Fix it=

[VIRUS-NOTE]
It's a false positive on the Files ["p3.exe"-"keygen.exe"] Don't worry,Restore It and Add it to the Exclusion List in your A/V Options so your A/V won't Delete it Again!

[NOTE]
DWI Release Installed States v1.0 steam_appid.txt States 10220..Also You only need to mount the image 1 time to Activate the game using the key-gen After its done the game can run without the image mounted

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