History Main / DeadlyGas

* In a second season episode of [[Fringe]], we have a [[ThoseWackyNazis creepy Nazi]] who's genetically tailoring a design toxin that will cause fatal asphyxiation to anyone who isn't blond and blue-eyed. In a CrowningMomentofAwesome, Walter displays his hatred of Nazis by [[TranquilFury coldly re-designing the same toxic gas to only kill the creepy Nazi guy at a crowded ''peace summit''.]] Holy crap.

* In ''FinalFantasy: Crystal Chronicles'', the plot is about removing miasma (deadly purple gas) from the world.

* ''[[SuperMarioBros Super Mario 64]]'' has the Hazy Maze Cave, which has the aptly-named Hazy Maze complete with poison yellow gas. Unless Mario is wearing the Metal Cap, prolonged stays in the Hazy Maze prove to be fatal.

* ''TheLegendOfZelda: Twilight Princess'' has one area with a deadly ''purple'' gas/mist that can be temporarily locally dispelled by waving a lantern about.

* The Borely Haunted Mansion in ''SilentHill 3''. In one section, Heather must avoid a strange red gas that follows her from room to room. No matter what difficulty you're playing on, if the gas touches you it's instant death.

* Worms features the worlds least deadly deadly gas, as it doesn't actually kill affected worms, just slowly reducing their life points to 1.

* In Michael Slade's ''Ghoul'', a paranoid bomber in London attempts to kill everyone in a theater with this trope, which he planned to generate by burning a whole lot of Teflon.

* ''CallOfDutyBlackOps'' has Nova-6, a chemical weapon originally developed by the Nazis then refined by the Soviets. A cloudy, green gas, the latter version capable of killing in seconds with minimal exposure [[spoiler: and planned by [[BigBad Dragovich]] to be released all over the United States.]]

** Uh, sorry? Fentanyl (and a [[BeyondTheImpossible ''five to ten times more powerful variant'']] called Sufentanil) are extremely commonly used IV analgesics for surgical anesthesia. Sure, you wouldn't use it for extended periods, but that's mainly because it's powerful enough to easily cause respiratory suppression. (As the Moscow police learned, I might note.) Terminal, drug addicted cancer patients are hardly its core demographic.

This gas often has a greenish color, which is more a case of TechnicolorScience than of TruthInTelevision (only if it's, for example, chlorine gas; the nerve gases preferred by [[BigBad real villains]] since WW2 are colorless and odorless.

One common mistake is having characters wearing gas masks be immune to nerve gas. By definition, nerve gas can penetrate the skin, so gas masks won't protect against it.

* In ''[[CommandandConquer Command & Conquer:]] Tiberian Sun'', the Brotherhood of Nod weaponizes [[GreenRocks Tiberium]] in the form of a [[ExactlyWhatItSaysOnTheTin Chemical Missile]], which detonates over the target area and saturates it with noxious clouds of highly-corrosive gas. Its effects on infantry are... unsettling, to say the least.

This gas often has a greenish color, which is more a case of TechnicolorScience than of TruthInTelevision (only if it's, for example, chlorine gas; the nerve gases preferred by [[BigBad real villains]] since WW2 are colorless and odorless. [[OrSoIHeard So they claim]]).

*** If I recall correctly, it is [[AllThereInTheManual mentioned in background materials]] that those breathing aparatuses work by extracting oxygen from water, so they wouldn't really work againt the poison gas.

** Shows up fairly frequently in the Classic Series as well; [[Recap/DoctorWhoS15E5Underworld "Underworld"]] and [[http://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS21E6TheCavesOfAndrozani "The Caves of Androzani"]] are two examples. The Fifth Doctor serial [[http://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS21E5PlanetOfFire "Planet of Fire"]] inverts the trope by focusing on a gas with particularly healthful properties.

** Shows up fairly frequently in the Classic Series as well; [[http://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS15E5Underworld "Underworld"]] and [[http://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS21E6TheCavesOfAndrozani "The Caves of Androzani"]] are two examples. The Fifth Doctor serial [[http://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS21E5PlanetOfFire "Planet of Fire"]] inverts the trope by focusing on a gas with particularly healthful properties.

* ''Stubbs The Zombies''. It doesn't matter if the main character sets off the poison gas, because he is a zombie. It's a problem if you are remote controlling a human and still have some more victims to kill. Oh well.

* Samara's recruitment mission in MassEffect 2 involves storming a mercenary base full of tanks of a tainted gaseous drug the Mercenaries were sold by an unscrupulous merchant. The deal is, inhaling the gas gives the user a sizable boost to [[magic biotic]] abilities, but would cause death after prolonged use, a fact that the merchant happened to not mention. Gameplay-wise, the canisters can be detonated during the level and standing in the gas temporarily improves the squad's biotic ability, but standing in it for too long will lead to a game over.

*As mentioned before, chlorine is distinctly green, and rather nasty to breathe. Chlorine, however, will generally not try to eat its way out of its container, unlike its sibling one row up. Fluorine is a yellowish-amber color, but if you ever see enough of it to see the color, you'd best hope it's [[http://theodoregray.com/periodicTable/Elements/009/index.s7.html#sample5 properly secured]] or you're already dead.