44		The Seventh Curse (Action, Horror, 1986)
41		Maniac Cop 3: Badge of Silence (Action, Horror, 1993)
40		Rigor Mortis (Action, Horror, 2013)
40		Dead Heist (Action, Horror, 2007)
40		Re-Kill (Action, Horror, 2015)
40		Raze (Action, Horror, 2013)
40		Evil Feed (Action, Horror, 2013)
40		Wolves (Action, Horror, 2014)
40		Shadow: Dead Riot (Action, Horror, 2006)
40		Code Red (Action, Horror, 2013)
40		Blade (Action, Horror, 1998)
40		The 8th Plague (Action, Horror, 2006)
40		Lurking Fear (Action, Horror, 1994)
40		Sleeper (Action, Horror, 2012)
40		Devil's Playground (Action, Horror, 2010)
40		The Horde (Action, Horror, 2016)
40		Spawn (Action, Horror, 1997)
40		Zone of the Dead (Action, Horror, 2009)
40		Isle of the Dead (Action, Horror, 2016)
34		Prince of Darkness (Horror, 1987)
34		Invaders from Mars (Horror, Sci-Fi, 1986)
34		In the Shadow of Kilimanjaro (Action, Adventure, Drama, Horror, 1986)
33		Zombie (Horror, 1979)
32		Firestarter (Action, Horror, Sci-Fi, 1984)
32		2019: After the Fall of New York (Action, Horror, Sci-Fi, 1983)
32		Dreamscape (Action, Adventure, Horror, 1984)
32		Deadline (Action, Horror, Thriller, 1984)
32		Hellhole (Action, Drama, Horror, 1985)
32		Lifeforce (Action, Horror, Sci-Fi, 1985)
32		Predator (Action, Horror, Sci-Fi, 1987)
32		Tenement (Action, Crime, Horror, 1985)
32		Godzilla 1985 (Action, Horror, Sci-Fi, 1984)
31		Galaxy of Terror (Action, Adventure, Horror, 1981)
31		Raw Force (Adventure, Horror, Action, 1982)
31		Silent Rage (Action, Horror, Sci-Fi, 1982)
31		Scanners (Action, Horror, Sci-Fi, 1981)
31		The Night Child (Horror, 1975)
31		Death House (Action, Horror, Sci-Fi, 1987)
31		The Zero Boys (Action, Thriller, Horror, 1986)
31		The Vindicator (Action, Horror, Sci-Fi, 1986)
31		The Haunting (Fantasy, Horror, 1963)
31		Bad Girls Dormitory (Action, Drama, Horror, 1986)
31		Dead End Drive-In (Action, Drama, Horror, 1986)
31		Fair Game (Action, Horror, Thriller, 1986)
31		The Majorettes (Action, Crime, Horror, 1987)
31		The Hidden (Action, Crime, Horror, 1987)
31		From a Whisper to a Scream (Action, Drama, Horror, 1987)
31		A Nightmare on Elm Street 3: Dream Warriors (Action, Fantasy, Horror, 1987)
31		The Wraith (Action, Horror, Romance, 1986)
30		Dawn of the Dead (Action, Horror, Thriller, 1978)
30		Witchcraft (Horror, Romance, 1964)
30		The Kiss of the Vampire (Horror, 1963)
30		Nightmare City (Action, Horror, Sci-Fi, 1980)
30		Beyond the Door (Horror, 1974)
30		Schizoid (Action, Horror, Mystery, 1980)
30		Godzilla vs. Biollante (Action, Drama, Horror, 1989)
30		Zombi 3 (Action, Horror, Sci-Fi, 1988)
30		Phantasm II (Action, Fantasy, Horror, 1988)
30		The Death Wheelers (Horror, 1973)
30		Ghost Town (Action, Horror, Western, 1988)
30		Razorback (Horror, Thriller, 1984)
30		Amsterdamned (Action, Horror, Thriller, 1988)
30		Maniac Cop (Action, Crime, Horror, 1988)
30		Witchtrap (Action, Horror, Thriller, 1989)
30		Death Street USA (Action, Sci-Fi, Horror, 1988)
30		The Strangeness (Horror, 1985)
30		DeepStar Six (Action, Horror, Sci-Fi, 1989)
30		Warlock (Action, Fantasy, Horror, 1989)
30		The Asphyx (Horror, Sci-Fi, 1972)
30		Watchers (Action, Horror, Sci-Fi, 1988)
29		The Car (Action, Horror, Mystery, 1977)
29		Todd McFarlane's Spawn 3: The Ultimate Battle (Animation, Action, Horror, 1999)
29		Todd McFarlane's Spawn 2 (Animation, Action, Horror, 1998)
29		Mirage (Action, Horror, Thriller, 1990)
29		Steel and Lace (Action, Horror, Sci-Fi, 1991)
29		Scanners II: The New Order (Action, Horror, Sci-Fi, 1991)
29		I Come in Peace (Action, Crime, Horror, 1990)
29		The Dark Side of the Moon (Action, Horror, Sci-Fi, 1990)
29		The Lost Platoon (Action, Horror, War, 1990)
29		Nightbreed (Action, Fantasy, Horror, 1990)
29		The Rift (Action, Adventure, Horror, 1990)
29		Predator 2 (Action, Horror, Sci-Fi, 1990)
29		Midnight Ride (Action, Horror, Thriller, 1990)
29		Maniac Cop 2 (Crime, Horror, Action, 1990)
29		Poltergeist II: The Other Side (Horror, 1986)
29		Class of 1999 (Action, Horror, Sci-Fi, 1990)
28		Alien³ (Action, Horror, Sci-Fi, 1992)
28		J.D.'s Revenge (Action, Horror, Thriller, 1976)
28		Race with the Devil (Action, Horror, Thriller, 1975)
28		Grindhouse (Action, Horror, Thriller, 2007)
28		The Survivor (Horror, Mystery, Thriller, 1981)
28		Wicked City (Action, Horror, Sci-Fi, 1992)
28		Doctor Mordrid (Action, Fantasy, Horror, 1992)
28		Nightwing (Horror, 1979)
28		Invisible: The Chronicles of Benjamin Knight (Action, Horror, Sci-Fi, 1993)
28		Split Second (Action, Crime, Horror, 1992)
27		Dark Confessions (Action, Drama, Horror, 2000)
27		End of Days (Action, Fantasy, Horror, 1999)
27		Hollow Man (Action, Horror, Sci-Fi, 2000)
27		Blood: The Last Vampire (Animation, Action, Horror, 2000)
27		Jason X (Action, Horror, Sci-Fi, 2001)
27		Vampires: Los Muertos (Action, Horror, Thriller, 2002)
27		Dog Soldiers (Action, Fantasy, Horror, 2002)
27		Freddy vs. Jason (Action, Horror, Thriller, 2003)
27		Straight Into Darkness (Action, Drama, Horror, 2004)
27		Kibakichi: Bakko-yokaiden (Action, Fantasy, Horror, 2004)
27		Blade II (Action, Horror, Sci-Fi, 2002)
27		Resident Evil (Action, Horror, Sci-Fi, 2002)
27		The Shaft (Action, Horror, Mystery, 2001)
27		Dracula 2000 (Action, Fantasy, Horror, 2000)
27		The Breed (Action, Adventure, Horror, 2001)
27		Ghosts of Mars (Action, Horror, Sci-Fi, 2001)
27		Route 666 (Action, Horror, Thriller, 2001)
27		Versus (Action, Fantasy, Horror, 2000)
27		Shadow Builder (Action, Horror, Thriller, 1998)
27		The Prophecy (Action, Fantasy, Horror, 1995)
27		The Demolitionist (Action, Horror, Sci-Fi, 1995)
27		Automatic (Action, Horror, Sci-Fi, 1995)
27		Species (Action, Horror, Sci-Fi, 1995)
27		Godzilla vs. Destoroyah (Action, Horror, Sci-Fi, 1995)
27		Evolver (Action, Horror, Sci-Fi, 1995)
27		Tales from the Crypt: Demon Knight (Action, Fantasy, Horror, 1995)
27		Hellbound (Action, Fantasy, Horror, 1994)
27		Phantasm III: Lord of the Dead (Action, Fantasy, Horror, 1994)
27		Class of 1999 II: The Substitute (Action, Horror, Sci-Fi, 1994)
27		Death Machine (Action, Horror, Sci-Fi, 1994)
27		Night Hunter (Action, Drama, Horror, 1996)
27		House of the Damned (Action, Horror, Thriller, 1996)
27		Deep Rising (Action, Adventure, Horror, 1998)
27		Alien: Resurrection (Action, Horror, Sci-Fi, 1997)
27		Vampires (Action, Horror, Thriller, 1998)
27		Virus (Action, Horror, Thriller, 1999)
27		Besat (Action, Crime, Horror, 1999)
27		Perdita Durango (Action, Crime, Horror, 1997)
27		Anaconda (Action, Adventure, Horror, 1997)
27		Dawn of the Dead (Action, Horror, Thriller, 2004)
27		Dark Breed (Action, Horror, Sci-Fi, 1996)
27		Polymorph (Action, Horror, Sci-Fi, 1996)
27		Judge and Jury (Action, Horror, Thriller, 1996)
27		Revelation (Action, Drama, Horror, 1999)
27		Species II (Action, Horror, Sci-Fi, 1998)
27		Aftershock (Action, Adventure, Horror, 2012)
27		Puppet Master X: Axis Rising (Action, Fantasy, Horror, 2012)
27		The Brain from Planet Arous (Action, Adventure, Horror, 1957)
27		Bait (Action, Horror, Sci-Fi, 2012)
27		Resident Evil: Retribution (Action, Horror, Sci-Fi, 2012)
27		Hate Crime (Action, Horror, Thriller, 2012)
27		Hansel & Gretel: Witch Hunters (Action, Fantasy, Horror, 2013)
27		Outpost: Rise of the Spetsnaz (Action, Horror, Sci-Fi, 2013)
27		World War Z (Action, Adventure, Horror, 2013)
27		The Colony (Action, Horror, Sci-Fi, 2013)
27		The Human Race (Action, Horror, Sci-Fi, 2013)
27		Abraham Lincoln: Vampire Hunter (Action, Fantasy, Horror, 2012)
27		Outpost: Black Sun (Action, Horror, Sci-Fi, 2012)
27		Priest (Action, Fantasy, Horror, 2011)
27		Haunted - 3D (Action, Fantasy, Horror, 2011)
27		Red State (Action, Crime, Horror, 2011)
27		The Bucks County Massacre (Action, Horror, Thriller, 2010)
27		Resident Evil: Afterlife (Action, Adventure, Horror, 2010)
27		The Day (Action, Drama, Horror, 2011)
27		War of the Dead (Action, Adventure, Horror, 2011)
27		Skeleton Lake (Action, Horror, Thriller, 2012)
27		Underworld: Awakening (Action, Fantasy, Horror, 2012)
27		The Darkest Hour (Action, Adventure, Horror, 2011)
27		Remains (Action, Drama, Horror, 2011)
27		Battle of the Damned (Action, Adventure, Horror, 2013)
27		Wolf Creek 2 (Action, Horror, Thriller, 2013)
27		Final Girl (Action, Drama, Horror, 2015)
27		Dead Rising: Watchtower (Action, Horror, Sci-Fi, 2015)
27		Hellboy (Action, Fantasy, Horror, 2004)
27		Sugar Hill (Action, Crime, Horror, 1974)
27		Unnatural (Action, Horror, Thriller, 2015)
27		The Pyramid (Action, Adventure, Horror, 2014)
27		Satan's Sadists (Action, Horror, Drama, 1969)
27		Throwback (Action, Adventure, Horror, 2014)
27		Into the Grizzly Maze (Action, Horror, Thriller, 2015)
27		Wonder Women (Action, Horror, Sci-Fi, 1973)
27		The Crazies (Action, Horror, Sci-Fi, 1973)
27		The Thrill Killers (Horror, Action, Crime, 1964)
27		Pride and Prejudice and Zombies (Action, Horror, Romance, 2016)
27		Exists (Action, Adventure, Horror, 2014)
27		Circus of the Dead (Action, Horror, Thriller, 2014)
27		Wer (Action, Fantasy, Horror, 2013)
27		Resident Evil: Red Falls (Action, Horror, Sci-Fi, 2013)
27		Avenged (Action, Fantasy, Horror, 2013)
27		Animal (Action, Adventure, Horror, 2014)
27		The Purge: Anarchy (Action, Horror, Sci-Fi, 2014)
27		Reptilicus (Action, Horror, Sci-Fi, 1961)
27		Gorgo (Action, Drama, Horror, 1961)
27		Another World (Action, Horror, Sci-Fi, 2014)
27		V/H/S Viral (Action, Fantasy, Horror, 2014)
27		Night Wolf (Action, Horror, Thriller, 2010)
27		Universal Soldier: Day of Reckoning (Action, Horror, Mystery, 2012)
27		Asudem (Action, Horror, Thriller, 2007)
27		Flight of the Living Dead (Action, Horror, Sci-Fi, 2007)
27		The Covenant (Action, Fantasy, Horror, 2006)
27		Mustang Sally (Action, Horror, Thriller, 2006)
27		Kronos (Action, Drama, Horror, 1957)
27		Rise: Blood Hunter (Action, Horror, Mystery, 2007)
27		Black Water (Action, Drama, Horror, 2007)
27		Gabriel (Action, Fantasy, Horror, 2007)
27		Methodic (Action, Drama, Horror, 2007)
27		Rogue (Action, Adventure, Horror, 2007)
27		Resident Evil: Extinction (Action, Horror, Sci-Fi, 2007)
27		See No Evil (Action, Horror, Thriller, 2006)
27		Valley of the Zombies (Action, Drama, Horror, 1946)
27		Anacondas: The Hunt for the Blood Orchid (Action, Adventure, Horror, 2004)
27		The Purge: Election Year (Action, Horror, Sci-Fi, 2016)
27		Resident Evil: Apocalypse (Action, Horror, Sci-Fi, 2004)
27		R-Point (Action, Horror, War, 2004)
27		AVP: Alien vs. Predator (Action, Horror, Sci-Fi, 2004)
27		Man-Thing (Action, Adventure, Horror, 2005)
27		Kill Command (Action, Horror, Sci-Fi, 2016)
27		The Ghoul (Action, Drama, Horror, 1933)
27		Ultraviolet (Action, Horror, Sci-Fi, 2006)
27		Doom (Action, Adventure, Horror, 2005)
27		A Sound of Thunder (Action, Adventure, Horror, 2005)
27		Aliens vs. Predator: Requiem (Action, Horror, Sci-Fi, 2007)
27		Skinwalkers (Action, Fantasy, Horror, 2006)
27		The Sky Has Fallen (Action, Drama, Horror, 2009)
27		Surviving Evil (Action, Horror, Thriller, 2009)
27		Slime City Massacre (Action, Horror, Sci-Fi, 2010)
27		Shaapit: The Cursed (Action, Drama, Horror, 2010)
27		Blood: The Last Vampire (Action, Horror, Thriller, 2009)
27		Tetsuo: The Bullet Man (Action, Horror, Sci-Fi, 2009)
27		Legion (Action, Fantasy, Horror, 2010)
27		Stagger (Action, Crime, Horror, 2009)
27		Daybreakers (Action, Horror, Sci-Fi, 2009)
27		Cloverfield (Action, Horror, Sci-Fi, 2008)
27		Pandorum (Action, Horror, Mystery, 2009)
27		Red Sands (Action, Horror, Thriller, 2009)
27		The Shadow of Chikara (Horror, Western, 1977)
27		Pig Hunt (Action, Horror, Thriller, 2008)
27		Bonnie & Clyde vs. Dracula (Action, Crime, Horror, 2008)
27		Among Dead Men (Action, Crime, Horror, 2008)
27		Outpost (Action, Horror, Sci-Fi, 2008)
27		Godzilla, King of the Monsters! (Action, Horror, Sci-Fi, 1956)
27		Resident Evil: Degeneration (Animation, Action, Horror, 2008)
27		Alien Raiders (Action, Horror, Sci-Fi, 2008)
27		Colin (Action, Drama, Horror, 2008)
27		Circulation (Action, Fantasy, Horror, 2008)
27		Pandemic (Action, Horror, Sci-Fi, 2016)

Notes: Movies similar to What Waits Below, Movies like What Waits Below, Action, Horror, Don Sharp, Robert Powell, Timothy Bottoms, Lisa Blount, Richard Johnson, Films, Video, Movie Similarities