Some more that I've seen, that I think are overlooked. Most of these I've also reviewed at my own website, so feel free to visit.
The Whisperer in Darkness -- one of the better H.P. Lovecraft-inspired films. It does qualify as a sci-fi mystery. Black and white.
http://buriedplanet.com/drupal/content/whisperer-darknessNight of the Creeps -- brain-eating slugs from space turn fraternity boys into mindless zombies. A must-see. It features the most awesome suicidal police detective in all of horror movie history.
http://buriedplanet.com/drupal/content/night-creepsLord of Illusions -- written by Clive Barker; features a truly creepy cult and cult leader, and that guy from
Quantum Leap!
http://buriedplanet.com/drupal/content/lord-illusionsRawhead Rex -- also written by Clive Barker, but a phenomenally bad movie. So bad that Barker actually disowned it. Features some really unintentionally funny scenes, but very, very difficult to find. Sells on eBay for ridiculous amounts not worth paying.
Bad Moon -- Are you a dog person who also loves horror movies? Bad Moon is interesting because it pits a werewolf against a German Shepherd. Only the dog knows that there's a werewolf threatening his family. One of the more artfully done werewolf films I've seen. Overlooked, in my opinion.
http://buriedplanet.com/drupal/content/bad-moonDark Night of the Scarecrow -- awesome, awesome made-for-TV-movie that is super, super creepy. Not very gory at all, this one is all atmosphere, but it's worth watching.
http://buriedplanet.com/drupal/content/dark-night-scarecrowBermuda Depths -- Another made-for-TV-movie, it's a spookfest featuring a mysterious girl with a strange paranormal attachment to a monstrously-sized demon turtle. A boy who loved her a long time ago returns to his seaside ancestral home, and she reappears -- and so does the mega-turtle. No, it's not Gamera. This one is out of print, and very hard to find, or so I hear.
Dead and Buried -- Wow, this one features some of the most horrifying (and not necessarily gory) murder/attack sequences I have ever seen. It starts as a standard "dangerous redneck" film set in New England, and then the 'mystery' unrolls pretty quickly. Not the greatest, but it features some super, super scary scenes.
http://buriedplanet.com/drupal/content/dead-and-buriedRavenous -- an unusual vampire tale featuring Guy Pierce. Didn't do great at the box office, but I think it's overlooked. For a horror movies it's got a wicked sense of humor.
http://buriedplanet.com/drupal/content/ravenousDead Ringers -- This film is really hard to categorize. As is usually the case, Cronenberg delivers body horror in this tale about identical twins played by Jeremy Irons. I should just say Jeremy Irons a few times and that should be enough to make you give this one a try. He's just awesome. What makes it stand out to me is that the horror is also very, very dramatic and
romantic. A really weird combination of elements, but it works.
http://buriedplanet.com/drupal/content/dead-ringersThe Manitou -- a b-movie for sure, but so hysterically funny (especially the ending) that it must be seen to be believed. Featuring a disco bogus fortune-teller, and a hilarious white guy made up to be a Native American.
http://buriedplanet.com/drupal/content/manitouDagon -- not bad for a HPL-inspired flick. A skinny dot com nerd runs away from monsters in a creepy coastal town that time forgot.
http://buriedplanet.com/drupal/content/dagonPerfume -- love this movie. A twisted tale of a serial killer trying to create the ultimate fragrance from the decanted souls of virginal women! Very creepy and well-done, but sadly overlooked.
http://buriedplanet.com/drupal/content/perfume-story-murdererThey Live -- Director John Carpenter tells the real history of humanity -- we're being fed subliminal lies by aliens! We are the 1%! Featuring the best back alley fight
over a pair of sunglasses ever filmed. Featuring Rowdy Roddy Piper saying, shotgun over his shoulder, "I have come here to kick @ss and chew bubble gum. ....
and I'm all outta gum."
http://buriedplanet.com/drupal/content/they-liveDeadly Friend -- A nerd puts his testicle-crushing robot's brain into the skull of his brain-dead girlfriend, because that's movie science folks.
http://buriedplanet.com/drupal/content/deadly-friendJesus Christ, Vampire Hunter -- Jesus returns to kick vampire tuckus, and updates his look. Featuring the hit single, "Everybody Gets Laid Tonight", and Santos,
luchadore of legend. Worth watching just to see Jesus turn into a yuppy with a tiny, tiny phone.
http://buriedplanet.com/drupal/content/jesus-christ-vampire-hunter <---- link to theme song may still work!
Blue Sunshine -- Nancy Reagan was right! People who dropped a particular kind of acid named 'Blue Sunshine' decade previous suddenly lose all their hair and become homocidal maniacs. An overlooked gem, in my opinion.
http://buriedplanet.com/drupal/content/blue-sunshine