Do this only on already-bricked devices. Heat the eMMC chip with a hot air gun (150°C for 30 seconds) or a hair dryer. If the device suddenly boots once cooled, you have cracked solder balls—a classic Postal3 physical failure.
mklink /J "%USERPROFILE%\Documents\My Games\Postal 3" "D:\Postal3_Saves" postal3 emmc
: Apply flux around the eMMC. Heat at 380°C, 40% airflow. Gently lift when solder melts (about 45 seconds). Do NOT pry. Do this only on already-bricked devices