!!The games
* From the ending of ''Doom II'':
-->The invasion is over. Earth is saved. Hell is a wreck. [[FridgeLogic You wonder]] [[LampshadeHanging where bad folks will go when they die, now.]]
* ''Doom 3'' explains why there are chainsaws on Mars: They got mixed up in an order for ''jackhammers''.
* Late in the third game, you can come across a terminal covered in blood. The terminal details how to perform a sacrifice to the forces of Hell written like cookbook instructions.
* Finding PDAs with entries complaining about spam mail, or planning parties is pretty funny if just for the contrast of them.
* [=MAP20=] of Doom II, ''Gotcha!'', becomes this in retrospect- the demons deployed their two most powerful monsters in the same spot, thinking it a foolproof plan. If Doomguy plays his cards right, they'll end up... [[EpicFail fighting each other]].
* The Xbox 360 Arcade port of Doom II has achievements that quote the Doom comic, including "You Have Huge Guts" for killing a Cyberdemon with your fists.
* During the E3 presentation of the 4th game, Doomguy comes across a palm-reader he doesn't have clearance for. He tracks down the corpse of someone who did have clearance, casually tears off his (remaining) arm and uses that to clear the way.

!!The [[Comicbook/{{Doom}} tie-in comic]]
* The comicbook in its entirety. Special mentions go to:
** "Stupid! Stupid! Stupid Imp! You're stupid! And you're gonna be stupid and '''dead!'''"
** "Imps? Zombies? You think you can get me?!? (''Thinks to himself'') Wait. Maybe they don't think. (''Starts yelling'') Well I do! And I think you're dead! Dead! '''Dead!''' '''DEAD!'''"
** "Knock knock who's there ME! [[MadnessMantra ME ME ME ME ME ME ME ME]]"
** "Aah! [[ChainsawGood Chainsaw! The Great Communicator!]]"
** "Now I'm RADIOACTIVE! That can't be good!"

!!Game Reviews
* The [[https://web.archive.org/web/20120104155012/http://www.next-gen.biz/reviews/doom-review EDGE review]], starting with the infamous line "[[ComicallyMissingThePoint If only you could talk to the monsters...]]"
* [=GamePro's=] infamous "[[http://knowyourmeme.com/memes/protip PRO TIP]]: Shoot the Cyberdemon until it dies." [[spoiler:It's fake--the "magazine scan" is Photoshopped together--but it's funny all the same.]]

!!Game Mods
* The Rickroller. We would say "nuff said," but no; [[http://www.youtube.com/watch?v=SL0VncaV0D0 you've gotta see this one]].
* One visual glitch is that, regardless of where on the image an enemy's weapon is, its attack emerges from its midriff. This resulted in unintended humour in the "Ultimate [[Franchise/TheSimpsons Simpsons]]" Doom mod, where the Cyberdemon is Mr. Burns... and [[PhallicWeapon his rockets emerge from his crotch]].