Here are a couple "cult" movies:
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Hardware (1990) - not a "good" movie, but never boring and very worth watching. Great soundtrack, fun cameos, several interesting ideas.
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Johnny Mnemonic (1995) - the best really bad cyberpunk movie. A very fun watch, if you're sufficiently protected from cringeing to death. Apparently there's a 2022 black and white cut that has a much better feel, but I've never seen it.
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Videodrome (1983) - it's got lowlifes, it's got high tech (for that time and place), it's got urban dystopias, and it's got evil corporations. I'd argue it's "proto-cyberpunk". Irregardless, it's one of the best SF horror movies ever made. Yes, right up there with Alien, arguably better bc it has more to say about how technology mediates reality and bc it really gets in your head. Heh.