65		The Thing (Horror, Mystery, Sci-Fi, 2011)
60		Apollo 18 (Horror, Mystery, Sci-Fi, 2011)
59		Five Million Years to Earth (Horror, Mystery, Sci-Fi, 1967)
57		The Thing (Horror, Mystery, Sci-Fi, 1982)
53		The Body Stealers (Horror, Mystery, Sci-Fi, 1969)
50		The Faculty (Horror, Mystery, Sci-Fi, 1998)
50		Unearthed (Horror, Mystery, Sci-Fi, 2007)
50		Strange Invaders (Horror, Mystery, Sci-Fi, 1983)
50		Die, Monster, Die! (Mystery, Horror, Sci-Fi, 1965)
49		Island of the Burning Damned (Horror, Mystery, Sci-Fi, 1967)
48		Frankenstein (Drama, Horror, Sci-Fi, 1931)
47		Village of the Damned (Horror, Sci-Fi, Thriller, 1995)
47		The Quatermass Xperiment (Horror, Sci-Fi, 1955)
47		Dark Breed (Action, Horror, Sci-Fi, 1996)
47		Dr. Jekyll and Mr. Hyde (Drama, Horror, Sci-Fi, 1920)
47		The Puppet Masters (Horror, Sci-Fi, Thriller, 1994)
45		Demonwarp (Horror, Mystery, Sci-Fi, 1988)
45		An Incident at Bridgeville (Horror, Mystery, Sci-Fi, 2005)
45		Videodrome (Horror, Mystery, Sci-Fi, 1983)
45		This Island Earth (Horror, Mystery, Sci-Fi, 1955)
45		The Jade Mask (Horror, Mystery, Sci-Fi, 1945)
45		Point of No Return (Horror, Mystery, Sci-Fi, 1976)
45		10 Cloverfield Lane (Drama, Horror, Mystery, Sci-Fi, 2016)
45		The Invisible Man Returns (Drama, Horror, Mystery, Sci-Fi, 1940)
45		The Vulture (Horror, Mystery, Sci-Fi, 1966)
45		Castle of Evil (Horror, Mystery, Sci-Fi, 1966)
44		I Married a Monster from Outer Space (Horror, Sci-Fi, 1958)
44		The Monster of Piedras Blancas (Horror, Sci-Fi, 1959)
44		Frankenstein 1970 (Horror, Sci-Fi, 1958)
44		The Fly (Drama, Horror, Sci-Fi, 1958)
43		20 Million Miles to Earth (Fantasy, Horror, Sci-Fi, 1957)
43		Not of This Earth (Horror, Sci-Fi, 1957)
43		Moon (Drama, Mystery, Sci-Fi, 2009)
42		The Thing from Another World (Horror, Sci-Fi, 1951)
42		Area 51 (Horror, Sci-Fi, Thriller, 2015)
42		Humanoids from the Deep (Horror, Sci-Fi, 1980)
42		Alien Abduction (Horror, Sci-Fi, Thriller, 2014)
42		The Earth Dies Screaming (Horror, Sci-Fi, 1964)
42		Lifeforce (Action, Horror, Sci-Fi, 1985)
42		Species II (Action, Horror, Sci-Fi, 1998)
42		The X Files (Drama, Mystery, Sci-Fi, 1998)
42		Son of Frankenstein (Sci-Fi, Horror, Drama, 1939)
42		Seedpeople (Horror, Sci-Fi, 1992)
42		Man Made Monster (Drama, Horror, Sci-Fi, 1941)
42		The Devil Commands (Horror, Sci-Fi, 1941)
42		They Live (Horror, Sci-Fi, Thriller, 1988)
42		Moontrap (Horror, Sci-Fi, 1989)
42		Driller (Horror, Sci-Fi, 2006)
41		Goke, Body Snatcher from Hell (Horror, Sci-Fi, 1968)
40		Species (Action, Horror, Romance, Sci-Fi, 1995)
40		Dreamland (Sci-Fi, Horror, Mystery, 2007)
40		Rip Cage (Horror, Mystery, Sci-Fi, 2007)
40		Cube Zero (Horror, Mystery, Sci-Fi, 2004)
40		The Relic (Horror, Mystery, Sci-Fi, 1997)
40		The Stepford Wives (Horror, Mystery, Sci-Fi, 1975)
40		Flight 7500 (Horror, Mystery, Sci-Fi, 2014)
40		Scourge (Horror, Mystery, Sci-Fi, 2008)
40		Chemical Wedding (Horror, Mystery, Sci-Fi, 2008)
40		Disturbing Behavior (Horror, Mystery, Sci-Fi, 1998)
40		Bug (Sci-Fi, Horror, Mystery, 1975)
40		Quarantine 2: Terminal (Horror, Mystery, Sci-Fi, 2011)
40		The Bay (Horror, Mystery, Sci-Fi, 2012)
40		Halloween III: Season of the Witch (Horror, Mystery, Sci-Fi, 1982)
40		Evidence (Horror, Mystery, Sci-Fi, 2012)
40		Decoder (Horror, Mystery, Sci-Fi, 1984)
40		Impulse (Horror, Mystery, Sci-Fi, 1984)
40		Chernobyl Diaries (Horror, Mystery, Sci-Fi, 2012)
40		Crawlspace (Horror, Mystery, Sci-Fi, 2012)
40		The Legend of Cooley Moon (Horror, Mystery, Sci-Fi, 2012)
40		Headspace (Horror, Mystery, Sci-Fi, 2005)
40		Brain Dead (Horror, Mystery, Sci-Fi, 1990)
40		The Supernaturals (Horror, Mystery, Sci-Fi, 1986)
40		The Bermuda Triangle (Horror, Sci-Fi, Mystery, 1978)
40		The Color Out of Space (Drama, Horror, Mystery, Sci-Fi, 2010)
40		Strange Behavior (Horror, Mystery, Sci-Fi, 1981)
40		Devil's Pass (Horror, Mystery, Sci-Fi, 2013)
40		Altitude (Horror, Mystery, Sci-Fi, 2010)
40		Shock Waves (Horror, Mystery, Sci-Fi, 1977)
40		The Return of Doctor X (Horror, Mystery, Sci-Fi, 1939)
40		Shadowglade (Horror, Mystery, Sci-Fi, 2015)
39		The Blob (Horror, Sci-Fi, 1958)
39		The Man Who Fell to Earth (Sci-Fi, Drama, 1976)
39		Invisible Invaders (Sci-Fi, Horror, 1959)
39		Alien (Horror, Sci-Fi, 1979)
39		The Man Who Could Cheat Death (Drama, Horror, Sci-Fi, 1959)
39		Attack of the 50 Foot Woman (Horror, Sci-Fi, 1958)
39		Plan 9 from Outer Space (Horror, Sci-Fi, 1959)
38		Phase IV (Horror, Sci-Fi, Thriller, 1974)
38		It Conquered the World (Horror, Sci-Fi, Thriller, 1956)
38		Predator (Action, Horror, Sci-Fi, 1987)
38		The Cyclops (Horror, Sci-Fi, 1957)
38		X the Unknown (Horror, Sci-Fi, 1956)
38		The Curse of Frankenstein (Horror, Sci-Fi, 1957)
38		Ex Machina (Drama, Mystery, Sci-Fi, 2015)
38		2001: A Space Odyssey (Adventure, Mystery, Sci-Fi, 1968)
38		The Crazies (Action, Horror, Sci-Fi, 1973)
38		Soylent Green (Mystery, Sci-Fi, Thriller, 1973)
37		Syngenor (Horror, Sci-Fi, 1990)
37		Demon Seed (Horror, Sci-Fi, 1977)
37		The Fourth Kind (Mystery, Sci-Fi, Thriller, 2009)
37		Godzilla vs. Destoroyah (Action, Horror, Sci-Fi, 1995)
37		Body Snatchers (Sci-Fi, Horror, Thriller, 1993)
37		Day of the Animals (Horror, Sci-Fi, Thriller, 1977)
37		Donovan's Brain (Sci-Fi, Horror, 1953)
37		The Dark (Horror, Sci-Fi, 1979)
37		Contact (Drama, Mystery, Sci-Fi, 1997)
37		The Medusa Touch (Horror, Sci-Fi, 1978)
37		I'll Follow You Down (Drama, Mystery, Sci-Fi, 2013)
37		Predator 2 (Action, Horror, Sci-Fi, 1990)
37		Alien Prey (Horror, Sci-Fi, 1977)
37		It Came from Beneath the Sea (Horror, Sci-Fi, 1955)
37		The Mask of Fu Manchu (Adventure, Horror, Sci-Fi, 1932)
37		Prometheus (Adventure, Mystery, Sci-Fi, 2012)
37		Watchers (Action, Horror, Sci-Fi, 1988)
37		Queen of Blood (Horror, Sci-Fi, 1966)
37		Invaders from Mars (Horror, Sci-Fi, 1986)
37		Cypher (Mystery, Romance, Sci-Fi, 2002)
37		The Quiet Earth (Drama, Mystery, Sci-Fi, 1985)
37		The Satan Bug (Crime, Mystery, Sci-Fi, 1965)
37		Creature from the Black Lagoon (Horror, Sci-Fi, 1954)
37		Shivers (Horror, Sci-Fi, 1975)
37		Pitch Black (Horror, Sci-Fi, 2000)
37		Aliens vs. Predator: Requiem (Action, Horror, Sci-Fi, 2007)
37		The Brain (Horror, Sci-Fi, 1988)
37		Iodine (Drama, Mystery, Sci-Fi, 2009)
37		28 Weeks Later (Drama, Horror, Sci-Fi, 2007)
37		Without Warning (Sci-Fi, Horror, 1980)
37		The Deadly Spawn (Horror, Sci-Fi, 1983)
37		It Came from Outer Space (Horror, Sci-Fi, 1953)
36		The Andromeda Strain (Sci-Fi, Thriller, 1971)
36		Silent Running (Drama, Sci-Fi, 1972)
35		Arrival (Drama, Mystery, Sci-Fi, 2016)
35		Gui si (Drama, Horror, Mystery, Sci-Fi, 2006)
35		Curse of the Fly (Drama, Horror, Mystery, Sci-Fi, 1965)
34		Twice-Told Tales (Horror, Mystery, Romance, Sci-Fi, 1963)
34		These Are the Damned (Drama, Fantasy, Horror, Sci-Fi, 1962)
34		Monster on the Campus (Horror, Sci-Fi, 1958)
34		The Colossus of New York (Horror, Sci-Fi, 1958)
34		How to Make a Monster (Horror, Sci-Fi, 1958)
34		The Cosmic Monster (Drama, Sci-Fi, Horror, 1958)
34		Willard (Horror, Sci-Fi, 1971)
34		The Incredible Shrinking Man (Drama, Horror, Sci-Fi, 1957)
34		The Twilight People (Adventure, Horror, Sci-Fi, 1972)
34		The Brain Eaters (Sci-Fi, Horror, 1958)
34		The Electronic Monster (Crime, Mystery, Sci-Fi, 1958)
34		The Arrival (Sci-Fi, Thriller, 1996)
34		Twelve Monkeys (Mystery, Sci-Fi, Thriller, 1995)
33		Minority Report (Action, Mystery, Sci-Fi, 2002)
33		The Creeping Flesh (Horror, Sci-Fi, 1973)
33		28 Days Later... (Drama, Horror, Sci-Fi, 2002)
33		Horror Hotel the Movie (Horror, Sci-Fi, 2016)
33		Last Woman on Earth (Drama, Horror, Mystery, Sci-Fi, 1960)
33		Attack of the Crab Monsters (Horror, Sci-Fi, 1957)
33		The Monster That Challenged the World (Horror, Sci-Fi, 1957)
33		Godzilla, King of the Monsters! (Action, Horror, Sci-Fi, 1956)
33		The Monolith Monsters (Drama, Horror, Sci-Fi, 1957)
32		The Brain Leeches (Horror, Sci-Fi, 1978)
32		Frogs (Horror, Mystery, Romance, Sci-Fi, 1972)
32		Five (Drama, Horror, Sci-Fi, 1951)
32		Phantom from Space (Horror, Sci-Fi, 1953)
32		Black Moon (Fantasy, Mystery, Sci-Fi, 1975)
32		Ombis: Alien Invasion (Action, Horror, Sci-Fi, 2013)
32		God Told Me To (Crime, Horror, Sci-Fi, 1976)
32		Under the Skin (Drama, Horror, Sci-Fi, 2013)
32		The Oxbow Cure (Drama, Horror, Sci-Fi, 2013)
32		Star Trek: The Motion Picture (Adventure, Mystery, Sci-Fi, 1979)
32		The Human Race (Action, Horror, Sci-Fi, 2013)
32		The Quatermass Conclusion (Drama, Mystery, Sci-Fi, 1979)
32		The Last Days on Mars (Horror, Sci-Fi, Thriller, 2013)
32		Dark Skies (Horror, Sci-Fi, Thriller, 2013)
32		The Law (Adventure, Horror, Sci-Fi, 1992)
32		Possible Worlds (Mystery, Sci-Fi, Crime, 2000)
32		6 Hours to Live (Drama, Mystery, Sci-Fi, 1932)
32		Echoes of Enlightenment (Drama, Mystery, Sci-Fi, 2001)
32		Cloverfield (Action, Horror, Sci-Fi, 2008)
32		The Walking Dead (Crime, Horror, Sci-Fi, 1936)
32		Alien: Resurrection (Action, Horror, Sci-Fi, 1997)
32		The Devil-Doll (Sci-Fi, Horror, 1936)
32		Progeny (Horror, Sci-Fi, Thriller, 1998)
32		Alien Factor 2: The Alien Rampage (Horror, Sci-Fi, 2001)
32		Impostor (Drama, Mystery, Sci-Fi, 2001)
32		Paycheck (Action, Mystery, Sci-Fi, 2003)
32		I, Robot (Action, Mystery, Sci-Fi, 2004)
32		AVP: Alien vs. Predator (Action, Horror, Sci-Fi, 2004)
32		Willard (Drama, Horror, Sci-Fi, 2003)
32		Dreamcatcher (Drama, Horror, Sci-Fi, 2003)
32		Altered (Horror, Sci-Fi, Thriller, 2006)
32		Blade II (Action, Horror, Sci-Fi, 2002)
32		Repo! The Genetic Opera (Horror, Musical, Sci-Fi, 2008)
32		Alien Raiders (Action, Horror, Sci-Fi, 2008)
32		Alien Exorcism (Mystery, Sci-Fi, Thriller, 2011)
32		The Collective (Horror, Sci-Fi, Thriller, 2011)
32		The Whisperer in Darkness (Mystery, Sci-Fi, Thriller, 2011)
32		The Monster Maker (Horror, Sci-Fi, 1944)
32		The Lady and the Monster (Horror, Sci-Fi, Thriller, 1944)
32		The Ghostmaker (Horror, Sci-Fi, Thriller, 2012)
32		Creature (Horror, Sci-Fi, 1985)
32		Dust (Drama, Horror, Sci-Fi, 2012)
32		Rejuvenatrix (Horror, Sci-Fi, 1988)
32		400 Days (Mystery, Sci-Fi, Thriller, 2015)
32		Not Like Us (Horror, Sci-Fi, 1995)
32		Polymorph (Action, Horror, Sci-Fi, 1996)
32		The Purge: Election Year (Action, Horror, Sci-Fi, 2016)
32		Daybreakers (Action, Horror, Sci-Fi, 2009)
32		Alien³ (Action, Horror, Sci-Fi, 1992)
32		Unaware (Horror, Sci-Fi, Thriller, 2010)
32		Hunting Grounds (Horror, Sci-Fi, 2009)
32		Xtro (Horror, Sci-Fi, 1982)
32		The Man from Planet X (Horror, Romance, Sci-Fi, 1951)
32		The Frozen Dead (Sci-Fi, Horror, 1966)
32		Extraterrestrial (Horror, Sci-Fi, 2014)
32		Bride of the Monster (Horror, Sci-Fi, 1955)
32		Sting of Death (Horror, Sci-Fi, 1965)
32		Tarantula (Horror, Sci-Fi, 1955)
32		The Last Man on Earth (Horror, Sci-Fi, 1964)
32		Blood Beast from Outer Space (Horror, Sci-Fi, 1965)
32		Return of the Fly (Drama, Fantasy, Horror, Sci-Fi, 1959)
32		Children of the Damned (Horror, Sci-Fi, 1964)

Notes: Movies similar to Monster a-Go Go, Movies like Monster a-Go Go, Horror, Mystery, Sci-Fi, Bill Rebane, Herschell Gordon Lewis, Philip Morton, June Travis, George Perry, Lois Brooks, SF, Science Fiction, SciFi, Sci Fi, Films, Video, Movie Similarities