To write on the during missions, you must have the marker equipped and press the "drop item" button (D-pad Up on controllers).
Use the included digital keys to activate the game on Steam or GOG if you prefer a digital-only setup. : postal-4-no-regerts-installation-tutorial
Physical copies for PlayStation were also released via Limited Run Games. In-Game "Paper" Mechanics To write on the during missions, you must
For a visual look at the physical PC release and its contents, you can view the trailer here: POSTAL 4: No Regerts - Thursday Update Trailer : r/Games Running With Scissors Reddit• Jun 21, 2021 POSTAL 4 PC Physical Release - Running With Scissors In-Game "Paper" Mechanics For a visual look at
Depending on your platform, follow these general installation procedures: : Insert the DVD into your drive. Run the Steam installer provided on the disc.