* 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: [[CorruptCorporateExecutive Conal Cochran]], the 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, laughing all the while as they are poisoned and eaten. His plan is to 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 mass murder to be a fun joke, the best ever in fact, because it's a joke on the children.
* CrowningMusicOfAwesome: Not just the famous Silver Shamrock jingle (see below) but the general musical themes. You could tell this was a John Carpenter movie from the first seconds.
* {{Earworm}}: [[http://www.youtube.com/watch?v=hIHUv2ooG38 Sing along now:]] HAPPY HAPPY HALLOWEEN, HALLOWEEN, HALLOWEEN! HAPPY HAPPY HALLOWEEN, [+SILVER SHAMROCK!+]
* {{Narm}}: Stop it, stop it, STOP IT! '''STOP IIIIIIT!!!!!'''
** The fist clench of impotent rage from Challis as he watches the "demonstration" of the 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...
* 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...