20 Underrated Horror Films

Instead of listing strictly 'underrated' films, I decided to list films that I've most often heard dismissed without actually being seen; I think they're all fantastic. 10 American horror films, 10 from Europe.
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1.
Son of Dracula (1943)
    1 2 3 4 5 6 7 8 9 10 6.2/10 X  
Count Alucard finds his way from Budapest to the swamps of the Deep South; his four nemeses are a medical doctor, a university professor, a jilted fiancé and the woman he loves. (80 mins.)
Director: Robert Siodmak
“ Look past the campy, albeit passionate/desperate lead performance of Lon Chaney Jr. (or embrace it utterly) and you'll find an atmospheric carnival of a movie, courtesy of the brilliant Siodmak brothers, complete with gilded camerawork, art direction and special effects. ” - accattone74
 
2.
The Monolith Monsters (1957)
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  
Rocks from a meteor which grow when in contact with water threaten a sleepy Southwestern desert community. (77 mins.)
Director: John Sherwood
“ Ten or fifteen minutes in you won't believe that THAT is the premise of this horror film - but it is(!) - and it works. There's great tension in this film, and the performances are that much better when you know the actors are having to convey fear of a rock. ” - accattone74
 
3.
It! The Terror from Beyond Space (1958)
    1 2 3 4 5 6 7 8 9 10 6.1/10 X  
The first manned expedition to Mars is decimated by an unknown life form which stows away on the rescue ship. (69 mins.)
Director: Edward L. Cahn
“ THE (along with Bava's PLANET OF THe VAMPIRES) main inspiration for ALIEN. A fantastic sci-fi/horror film where the small crew of a space ship with limited resources struggles to fight off a seemingly indestructible monster. Plus it stars cocky/dreamy genre icon Marshall Thompson - he's such a sensitive butch. ” - accattone74
 
4.
Monster on the Campus (1958)
    1 2 3 4 5 6 7 8 9 10 5.8/10 X  
The blood of a primitive fish exposed to gamma rays causes a benign research professor to regress to an ape-like, bloodthirsty prehistoric hominid. (77 mins.)
Director: Jack Arnold
“ Despite the title this is one of the last gems of the era. Giant bugs, grizzly (off-camera) murders, and a great lead performance by Arthur Franz. A wonderful premise that has a lot of ties to ALTERED STATES, albeit with a lot less nudity, less schizophrenia, and no visceral-Catholic sex-vision sequences. ” - accattone74
 
5.
Frankenstein Created Woman (1967)
    1 2 3 4 5 6 7 8 9 10 6.6/10 X  
A dead and frozen Baron Frankenstein is re-animated by his colleague Dr. Hertz proving to him that the... (86 mins.)
Director: Terence Fisher
“ One of the great films of Hammer Horror, and arguably the most undermentioned. My favorite Anthony Hinds script, without a doubt, and one of the late, great Peter Cushing's finest performances. Just thinking of the end gives me a knot in my gut. ” - accattone74
 
6.
Hatchet for the Honeymoon (1970)
    1 2 3 4 5 6 7 8 9 10 6.4/10 X  
A bridal design shop owner kills various young brides-to-be in an attempt to unlock a repressed childhood trauma that's causing him to commit murder. (88 mins.)
Director: Mario Bava
“ One of many horror films that turns the genre on its ear, but one of the few that successfully pulls it off. You know who the killer is from 'go', so just sit back and enjoy the wild ride. Bava was commenting on the limitations of genre, and his own limitations within it, but by going there he unknowingly pushed himself into heretofore unseen realms of perversion. ” - accattone74
 
7.
The Werewolf Versus the Vampire Woman (1971)
    1 2 3 4 5 6 7 8 9 10 5.4/10 X  
Elvira is travelling through the French countryside with her friend Genevieve, searching for the lost... (86 mins.)
Director: León Klimovsky
“ I love Paul Naschy. The man LOVED horror movies, and no one has loved, is loving, or will love horror movies more than Naschy did. Within the world of Euro-Horror this film is highly respected, but more people need to see it. Get over the cheesy acting already, silly American. Just have fun and enjoy Naschy's passion (and the slow-motion jigs of the lesbian undead). ” - accattone74
 
8.
Tombs of the Blind Dead (1972)
    1 2 3 4 5 6 7 8 9 10 6.2/10 X  
In the 13th century there existed a legion of evil knights known as the Templars, who quested for eternal... (101 mins.)
“ The only film in the Blind Dead series worth seeing (no pun intended). Creepy, creepy, and creepy. ” - accattone74
 
9.
Ganja & Hess (1973)
    1 2 3 4 5 6 7 8 9 10 6.1/10 X  
After being stabbed with an ancient, germ-infested knife, a doctor's assistant finds himself with an insatiable desire for blood. (110 mins.)
Director: Bill Gunn
“ One of the most daring films I've ever seen. Not only a great vampire film, but a relentless attack/allegory against Christianity. Perhaps, ultimately, a feminist film as well. ” - accattone74
 
10.
The Killing Kind (1973)
    1 2 3 4 5 6 7 8 9 10 6.3/10 X  
Young Terry Lambert returns home from serving a prison term for a gang-rape he was forced to participate in... (88 mins.)
“ Curtis Harrington is the patron saint of the underrated and undermentioned; this is his best horror film. Wonderful performances from Ann Southern and John Savage, and for you torture-lovers, one of the most shocking murder scenes I've ever seen on film, and I've seen a lot (like the rest of you). ” - accattone74
 
11.
Lemora: A Child's Tale of the Supernatural (1973)
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  
A young girl who returns to her hometown to see her dying father finds herself being drawn into a web of vampirism and witchcraft. (80 mins.)
“ Like many films on this list, LEMORA is a low-budget phenom. What the filmmakers were able to do with barely any money is just startling. I'm a sucker for a dark fairytale, in particular one with monsters, and LEMORA more than delivers in the darkness department. There's also something very tawdry about this film, but it's hard to pinpoint - it's as though there's a very fine layer of immorality on the entire movie. ” - accattone74
 
12.
Scream Blacula Scream (1973)
    1 2 3 4 5 6 7 8 9 10 5.6/10 X  
The vampire Mamuwalde (Blacula) is stirred by African voodoo, and is forced to kill again. (96 mins.)
Director: Bob Kelljan
“ I think better than the original in every way, but for some reason it simply does not get its due. Pam Grier's star was on the rise with this one, with (I believe) SBS made right after COFFY, but before FOXY BROWN. A great story of love, revenge, voodoo, and baadasssssedness. When Mamuwalde (aka Blacula) gathers a vampire army at his stately manor it's a gruesome sight indeed. ” - accattone74
 
13.
The Living Dead at Manchester Morgue (1974)
    1 2 3 4 5 6 7 8 9 10 6.9/10 X  
A cop chases two hippies suspected of a series of Manson family-like murders; unbeknownst to him, the real culprits are the living dead, brought to life with a thirst for human flesh by chemical pesticides being used by area farmers. (95 mins.)
Director: Jorge Grau
“ The dead are being brought back to life by a radiation device that's meant to target crop-killing bugs. Two strangers brought together by circumstance are forced to confront the horror head on. Arthur Kennedy as the gruff police inspector almost ruins it, but everything else in the film is simply a treasure. The scene of the first zombie's appearance is in my 'canon of terrifying sequences', as is the scene in the subterranean tomb. If you can find it, Jorge Grau's film about Bathory, BLOOD COUNTESS, is fantastic as well. ” - accattone74
 
14.
Sugar Hill (1974)
    1 2 3 4 5 6 7 8 9 10 5.7/10 X  
When her boyfriend is murdered by gangsters, Sugar Hill decides not to get mad, but BAD! She entreats... (91 mins.)
Director: Paul Maslansky
“ Sugar Hill, a woman whose man was killed by THE MAN, turns to voodoo to enact a vicious revenge. Sugar returns to her ancestral home, reclaims her beliefs, and enacts a bargain with hunky Voodoo god, Baron Samedi. In exchange for her soul, Baron Samedi lends her the use of his zombie hit men. A fantastic film, hands down. Arguably, SUGAR HILL is one of the greatest films in blaxploitation, going further than most in its depiction of the universal wickedness of Whitey. ” - accattone74
 
15.
Autopsy (1975)
    1 2 3 4 5 6 7 8 9 10 5.9/10 X  
A pathology med student and a priest team up to investigate a wave of suicides blamed on sun spots and discover a number of them to be actual murders. (100 mins.)
“ A hot mess in many ways, but something brilliant simmers beneath the surface of this film. Somebody please watch it and tell me what this 'something' is. The set piece in the museum is one of the best I've ever seen, and the opening nightmare-hallucination in the hospital is super-creeps. ” - accattone74
 
16.
The Grapes of Death (1978)
    1 2 3 4 5 6 7 8 9 10 6.2/10 X  
A young woman discovers that the pesticide being sprayed on vineyards is turning people into killer zombies. (85 mins.)
Director: Jean Rollin
“ Zombies on the loose in the wine country of France. If the undead apocalypse is indeed nigh, best to have a nice beaujolais nearby, yes? The late, great Jean Rollin is perhaps THE acquired taste of Euro-Horror, being either reviled or loved. THE GRAPES OF DEATH is one of his best, keeping his penchant for gratuitous sex and nudity to a minimum, and creating one hell of a disturbing atmosphere at the same time. ” - accattone74
 
17.
The Brood (1979)
    1 2 3 4 5 6 7 8 9 10 6.9/10 X  
A man tries to uncover an unconventional psychologist's therapy techniques on his institutionalized wife, amidst a series of brutal murders. (92 mins.)
“ One of Cronenberg's best ideas, and that's saying something. Forgot about the terror tied to the nightmare-reality-potentialities of SCANNERS, or the over-rated (IMHO) VIDEODROME, here is where the real terror of the future is going to lie - in people being able to physically manifest their strongest emotions. And ones that once manifest are beyond the control of the creator. Scary indeed. ” - accattone74
 
18.
Antropophagus (1980)
    1 2 3 4 5 6 7 8 9 10 5.4/10 X  
A group of tourists become stranded on an uninhabited island where they are stalked by an insane, violent, and grotesque killer that slaughtered the town's former residents. (90 mins.)
Director: Joe D'Amato
“ Just see it. There are moments are pure terror. Like the 9-month pregnant woman having her fetus yanked out of her and devoured before her very eyes. Take that pro-lifers! ” - accattone74
 
19.
The Changeling (1980)
    1 2 3 4 5 6 7 8 9 10 7.3/10 X  
A man staying at a secluded historical mansion finds himself being haunted by the presence of a spectre. (107 mins.)
Director: Peter Medak
“ One of the scariest movies I know. ” - accattone74
 
20.
Anguish (1987)
    1 2 3 4 5 6 7 8 9 10 6.7/10 X  
A controlling mother uses telepathic powers to send her middle-aged son on a killing spree. (86 mins.)
Director: Bigas Luna
“ Like a spiral layer-cake made of eyeballs, pigeon blood and popcorn. Basically, delicious. ” - accattone74