Ok, first of all, never let child play this game.
The first time I ever saw Postal 2 I was shocked but curious, it didn't took that long until I got it installed. Let's talk about gameplay, keep in mind the game came out in 2003, Postal 2 as the devs states, is as violent as you are, you can finish the game without killing anyone... or you can go full mayhem on anything that dares to move. The history actually has some humor to it... a very dark... disturbing... atmosphere, everything goes down on the course of five days...