* SugarWiki/AwesomeMusic: Not just the famous Silver Shamrock jingle (see below) but the general musical themes. You could tell this was a Creator/JohnCarpenter movie from the first seconds.
* BizarroEpisode: For the franchise. Although, if the original plans for an anthology movie series had continued this would've been averted (depending on what the other films would've been like).
* BrokenBase: Many people were outraged at the lack of any continuity with the first two films, and in general this film is written off as a bizarre non sequitur. Others, though, think that Carpenter's anthology idea was promising, but unfairly killed by fans who wouldn't accept a ''Halloween'' film without Michael Myers.
* CompleteMonster: [[BigBad Conal Cochran]] is the [[CorruptCorporateExecutive CEO]] of Silver Shamrock Novelties, a company known for its Halloween masks, which it shipped all over the United States. Cochran had built these masks with a computer chip made from a fragment of Stonehenge. When Silver Shamrock's commercial would air on Halloween night, the chip was to unleash a lethal swarm of insects and snakes, killing the wearer and anyone in the immediate vicinity. Cochran is shown demonstrating how these masks work on an innocent family, causing them to be poisoned and eaten. His plan is to [[WouldHurtAChild kill thousands of children]] all over the country, partially to bring back the darker aspects of the Celtic festival Samhain, which he connects to witchcraft, but also just because he considers this [[ObviouslyEvil mass murder to be a fun joke]], the best ever in fact, because it's a joke on the children.
* ContestedSequel: While this film has gained a cult following, it still tends to be polarizing to fans of other ''Halloween'' films.
* {{Earworm}}: [[http://www.youtube.com/watch?v=hIHUv2ooG38 Sing along now:]] HAPPY HAPPY HALLOWEEN, HALLOWEEN, HALLOWEEN! HAPPY HAPPY HALLOWEEN, [+SILVER SHAMROCK!+]
** "X more days to Halloween... Halloween, Halloween..."
* HesJustHiding: [[spoiler:It's implied Cochran may have survived, however, with the magic of Stonehenge transporting him to another location rather than killing him at the end of the film.]]
* HilariousInHindsight:
** Writer/director Tommy Lee Wallace would go on, eight years later, to direct the miniseries adaptation of Creator/StephenKing's ''Literature/{{It}}''-- another film about a complete monster who kills children.
** Daniel O'Herlihy plays a CorruptCorporateExecutive, something that Daniel would be well known portraying in the ''Franchise/RoboCop'' films as "The Old Man." Both of Daniel's roles even had companies that are populated with cyborgs (well, Cochran's are robots designed to resemble humans, while "The Old Man" has several that were built from those who used to be human).
* {{Narm}}:
** "Stop it, stop it, STOP IT! '''STOP IIIIIIT!!!!!'''"
** The fist clench of impotent rage from Challis as he watches the "demonstration" of the Magic Pumpkin advert's effect.
** Buddy, bar none. Even ''if'' he had just watched his kid's head rot away before his eyes, and was now locked in a room full of poisonous snakes...
** The fact that the villain somehow got a piece of Stonehenge, and when the hero asks him how Cochran simply Handwaves it.
** The fact that Cochran's plan is so ludicrous, that it falls apart even under the slightest bit of logic or scrutiny.
%%* NauseaFuel
* ReplacementScrappy: Conal Cochran and the film itself, to many fans at the time.
* {{Squick}}: A whole lot of it, both when Cochran's robot mooks decide they want to kill someone, and when the masks' evil spells are triggered on their unwitting victims...
* TheyWastedAPerfectlyGoodPlot: Some who dislike the film admit that the concept of the film and the anthology film series has potential, but feel that the execution is both lousy and laughable.
* VindicatedByHistory: While the film was absolutely savaged at first and flopped at the box office, it has since picked up a fairly significant [[CultClassic cult following]] for its unique plot, fantastic score and atmosphere, and VisualEffectsOfAwesome.