[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/e73761f25fa482c32706ade7cea23708.png]]
[[caption-width-right:350:[[BlatantLies Looks like some good]] [[SarcasmMode old-fashioned wholesome family entertainment here.]][[note]]And no, your eyes aren't deceiving you. There is a dead baby in there.[[/note]]]]
Alright, let's be completely honest. This series is chock-full of unsettling content. Especially the first installment, though.

Entries with their own pages:

* ''NightmareFuel/Postal2''
* ''NightmareFuel/PostalIII''
* ''[[NightmareFuel/PostalFilm Postal (2007)]]''

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* The reason for going on a killing spree in the first place. According to the manual, the town of Paradise has come under the effect of a madness-inducing plague and the Postal Dude is the only person able to put a stop to it. Of course, given his diary entries and sadistic enjoyment of causing death and destruction, he's probably just flown over the cuckoo's nest.
* The diary entries in between levels, e.g. "10/17/97 The Earth is hungry. It's heart throbs and demands cleansing. The Earth is also thirsty..."[[note]]His diary on Hard mode and above in Redux, and the manual of the original game mention that his neighbors have been infected by a sort of hate plague: ''Moving to "Paradise" was a tragic mistake. People here are...sick. I hear gunshots, screams after dark. Now the phone calls, sayin' I'm being thrown outta this house. MY house. Wearing Kevlar vest and carrying a sidearm at all times now...''[[/note]]
* [[HellIsThatNoise The screams of the dying will definitely qualify.]]
* The unsettling menu screens, very unsettling loading screens, and the total horror of the credits screen (pictured above), in which also features a '''[[DeathOfAChild deceased BABY in it!]]''' (Albeit [[{{Bowdlerize}} this was edited out]] in ''Redux'') The amount of BodyHorror depicted in all of these is disturbing as all hell.
** And in case you thought it wasn't disturbing enough, ''Redux'' has redrawn the menu and loading screens for extra detail, and ''given them animation''.
** To add on to the creepiness of the loading screens, it's bad enough that several of them depict the various atrocities the Postal Dude has committed with the corpses of his victims sprawled out everywhere, but many others are [[MindScrew downright incomprehensible]], displaying horrifying entities that resemble borderline [[EldritchAbomination Eldritch Abominations]]! Take a look at the loading screens of "The Trailer Park," "The City," or "Shanty Town" if you're brave enough.
* Also, due to EarlyInstallmentWeirdness, the violence isn't PlayedForLaughs nearly as much as ''Postal 2'' and the subsequent sequels: the only thing remotely funny is Rick Hunter's signature baritone quipping {{Bond One Liner}}s - and even then, it's implied that he isn't the voice for The Postal Dude himself, but a LiteralSplitPersonality and/or [[DemonicPossession Demonic Possessor]] forcing The Postal Dude on a killing spree ForTheEvulz.
* [[http://youtu.be/uxgoLk2NCh4?t=2h17m11s The ending for the original game]] counts as this, big time. The final level starts off at an elementary school, [[ButThouMust where you're seemingly given no choice]] [[CrueltyIsTheOnlyOption but to gun down the laughing and playing children]] - [[spoiler:[[ImprobableInfantSurvival except they don't die]], [[DissonantSerenity or even react]], [[WhyWontYouDie to being shot at, running through fire, or dodging rocket launcher rounds]]. [[HeroicBSOD Then the Postal Dude, seemingly having what little remains of his sanity snap like a twig, passes out]], [[InterfaceScrew while the camera blurs out to blackness]]. Then he wakes up locked in a BedlamHouse, while a distorted voice [[{{Anvilicious}} talks about how the stress of modern day life causes people like the character to]] "[[TitleDrop Go Postal]]", [[YouBastard all while saying your atrocities would never be understood by anybody else, even if you deluded yourself into being a One Man Army fighting against all odds]]. The voice then says that, [[NoodleIncident while they will never understand what set you off]], [[OhCrap "rest assured, we WILL have plenty of time to study [you]."]]]]
** The ending for the Redux edition isn't much better. [[spoiler:Simply put, The Dude comes across a funeral procession, and this simple event causes him to have his breakdown due to one of two potential reasons: One, he likely thought the funeral was for him, and that he was DeadAllAlong. Two, if there are people capable of mourning the dead in the middle of a hate plague he was allegedly the only one left uninfected in, that means that there probably was none to begin with or he did TOO good a job at stopping it, and he likely killed ''hundreds and hundreds'' of innocent people [[AllForNothing for no reason other than his own paranoia]].]]
** Also, take note that the only hostile on the map is no one but [[spoiler:the Postal Dude himself. Once the coffin hits the bottom of the grave]], the hostile count ticks down to nil.
** The Hard Mode ending only opens up more theories, considering that we now see [[spoiler:a man and a woman standing over the casket as it is lowered down into the grave. Could it be the Postal Dude's parents watching his own son's funeral procession and that the whole game was nothing but a DyingDream? Some people have noted that the two persons standing over the grave along with the priest look a lot like the Postal Dude and his wife from Paradise Lost. This could very well mean that we've been playing as T. Dude, Sr. the whole game and that he just watched his own son watch his funeral.]]
* The soundtrack qualifies as insanity in music form. Here's an [[https://youtu.be/6RH3MFPgTdg example]].
** Redux's soundtrack manages to be even more [[https://youtu.be/s2sUw47TEzY horrifying]].
** If you're brave enough to face your fears, wait until you see ''[[https://www.youtube.com/watch?v=5d2rhIU7VJI The City]]'' loading screen, which features a [[ManOnFire flaming]] [[ScarySkeleton skeleton-like figure]] which will likely keep you awake the whole night! [[ParanoiaFuel God have mercy!]] While in Redux, the song uses an ear-ringing noise instead of a looped human scream.
** To make things even worse, the "Texbeast" loading screen from the said level [[https://vignette3.wikia.nocookie.net/steamtradingcards/images/b/b8/POSTAL_Artwork_4.jpg/revision/latest?cb=20141030205007 appears as a cop carrying a]] [[StuffBlowingUp Rocket Launcher]] and a handgun in ''Postal 1's'' Trading Cards, bearing a PsychoticSmirk, putting the actual loading screen to shame. The things the Postal Dude sees in his mind may be terrifying, but they aren't much better in the real world.
* Some of the Dude's [[https://www.youtube.com/watch?v=T6usSBZeMWA lines]] are pretty creepy, but with a touch of BlackComedy. He really changed a lot from ''Postal 1'' to ''Postal 2''. However, in ''Redux'', [[https://youtu.be/b8SaST434gk the Postal Dude sounds like an actual mass murderer instead of a comedic lunatic.]]
* Some of the game's areas have eerie ambient sound effects playing once you're near them that really pump up a little more of that psychotic feel of the game. The same sound effects can be heard in ''Postal 2'', playing in certain areas for no reason at all other than weird out the player.
* As WebVideo/Civvie11 points out, somehow the screams in the Japanese exclusive expansion pack ''Super Postal'' are more terrifying than the screams in the base, English game.
-->''"Because, when you hear it in English, it's cheesy and campy. But not understanding it makes it worse."''
* You can preform executions on those who are mortally wounded, which are accompanied by a simple yet disturbing ScareChord.
** If you execute someone with the rocket launcher, Postal Dude will simply lift the gun up and ''crush their skull with it.''
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