The first Postal is a game that I feel is underrated in regards to what it accomplishes. What it accomplishes is a harrowing and unsettling atmosphere where the levels lack music, leaving the only sounds for the player to hear being the screams of those they've slain echoing through the wind and the sounds of their weapons.

When music does appear, it's all very droning and is paired with loading screens that feature grotesque artwork. The dude makes comments like in the other games but he's quite a bit more sadistic and uncaring in this game compared to later ones (and might not even be the dude himself if the file names tell us anything)

No hate to the later games intended but the first one is it's own beast, decidedly more horror in nature and less dark comedy.