52		Cowboys & Aliens (Action, Sci-Fi, Thriller, 2011)
49		Jurassic Park (Adventure, Sci-Fi, Thriller, 1993)
40		Jurassic Park III (Action, Adventure, Sci-Fi, Thriller, 2001)
38		3:10 to Yuma (Drama, Thriller, Western, 1957)
37		Doomsday (Action, Sci-Fi, Thriller, 2008)
34		Once Upon a Time in Mexico (Action, Crime, Thriller, 2003)
34		Down in the Valley (Drama, Romance, Thriller, 2005)
32		Monsters (Drama, Sci-Fi, Thriller, 2010)
32		The Arrival (Sci-Fi, Thriller, 1996)
32		Seconds (Sci-Fi, Thriller, 1966)
32		The Missing (Adventure, Thriller, Western, 2003)
32		Thunderball (Action, Adventure, Thriller, 1965)
31		The Andromeda Strain (Sci-Fi, Thriller, 1971)
30		Westworld (Action, Sci-Fi, Thriller, 1973)
30		Reign of Fire (Action, Adventure, Fantasy, Thriller, 2002)
30		Soylent Green (Mystery, Sci-Fi, Thriller, 1973)
30		Young Guns (Action, Crime, Drama, Thriller, 1988)
29		The Avengers (Action, Sci-Fi, Thriller, 2012)
29		Terminator 2: Judgment Day (Action, Sci-Fi, Thriller, 1991)
29		Blade Runner (Sci-Fi, Thriller, 1982)
29		Donnie Darko (Drama, Sci-Fi, Thriller, 2001)
29		Twelve Monkeys (Mystery, Sci-Fi, Thriller, 1995)
29		On Her Majesty's Secret Service (Action, Adventure, Thriller, 1969)
28		Children of Men (Drama, Sci-Fi, Thriller, 2006)
28		High Noon (Drama, Thriller, Western, 1952)
28		District 9 (Action, Sci-Fi, Thriller, 2009)
28		Gattaca (Drama, Sci-Fi, Thriller, 1997)
28		Goldfinger (Action, Adventure, Thriller, 1964)
28		The Butterfly Effect (Sci-Fi, Thriller, 2004)
27		The Happening (Sci-Fi, Thriller, 2008)
27		Quarantine (Horror, Sci-Fi, Thriller, 2008)
27		The Invasion (Sci-Fi, Thriller, 2007)
27		Splinter (Horror, Sci-Fi, Thriller, 2008)
27		Death Race (Action, Sci-Fi, Thriller, 2008)
27		The Butterfly Effect 2 (Sci-Fi, Thriller, 2006)
27		War of the Worlds (Adventure, Sci-Fi, Thriller, 2005)
27		Z for Zachariah (Drama, Sci-Fi, Thriller, 2015)
27		The Final Cut (Action, Sci-Fi, Thriller, 2004)
27		Primer (Drama, Sci-Fi, Thriller, 2004)
27		The Hunger Games: Mockingjay - Part 1 (Drama, Sci-Fi, Thriller, 2014)
27		The Day the Earth Stood Still (Drama, Sci-Fi, Thriller, 2008)
27		Sunshine (Adventure, Sci-Fi, Thriller, 2007)
27		The Signal (Horror, Sci-Fi, Thriller, 2007)
27		Deja Vu (Action, Sci-Fi, Thriller, 2006)
27		Next (Action, Sci-Fi, Thriller, 2007)
27		Surrogates (Action, Sci-Fi, Thriller, 2009)
27		The Purge (Horror, Sci-Fi, Thriller, 2013)
27		Dark Skies (Horror, Sci-Fi, Thriller, 2013)
27		In Time (Action, Sci-Fi, Thriller, 2011)
27		Lucy (Action, Sci-Fi, Thriller, 2014)
27		The Last Days on Mars (Horror, Sci-Fi, Thriller, 2013)
27		Europa Report (Sci-Fi, Thriller, 2013)
27		Time Lapse (Sci-Fi, Thriller, 2014)
27		Riddick (Action, Sci-Fi, Thriller, 2013)
27		These Final Hours (Drama, Sci-Fi, Thriller, 2013)
27		The War of the Worlds (Action, Sci-Fi, Thriller, 1953)
27		Super 8 (Mystery, Sci-Fi, Thriller, 2011)
27		Automata (Action, Sci-Fi, Thriller, 2014)
27		The Fourth Kind (Mystery, Sci-Fi, Thriller, 2009)
27		Gamer (Action, Sci-Fi, Thriller, 2009)
27		Push (Action, Sci-Fi, Thriller, 2009)
27		Skyline (Action, Sci-Fi, Thriller, 2010)
27		The Adjustment Bureau (Romance, Sci-Fi, Thriller, 2011)
27		The Divide (Drama, Sci-Fi, Thriller, 2011)
27		Source Code (Mystery, Sci-Fi, Thriller, 2011)
27		Limitless (Mystery, Sci-Fi, Thriller, 2011)
27		The Butterfly Effect 3: Revelations (Crime, Sci-Fi, Thriller, 2009)
27		Cube²: Hypercube (Sci-Fi, Thriller, 2002)
27		WarGames (Sci-Fi, Thriller, 1983)
27		Cube (Mystery, Sci-Fi, Thriller, 1997)
27		Event Horizon (Horror, Sci-Fi, Thriller, 1997)
27		Phantoms (Horror, Sci-Fi, Thriller, 1998)
27		Godzilla (Action, Sci-Fi, Thriller, 1998)
27		eXistenZ (Horror, Sci-Fi, Thriller, 1999)
27		Cell (Horror, Sci-Fi, Thriller, 2016)
27		The Island of Dr. Moreau (Horror, Sci-Fi, Thriller, 1996)
27		The Dead Zone (Horror, Sci-Fi, Thriller, 1983)
27		Body Snatchers (Sci-Fi, Horror, Thriller, 1993)
27		Universal Soldier (Action, Sci-Fi, Thriller, 1992)
27		Cyborg (Action, Sci-Fi, Thriller, 1989)
27		The Blob (Horror, Sci-Fi, Thriller, 1988)
27		Village of the Damned (Horror, Sci-Fi, Thriller, 1995)
27		The Hunger Games: Mockingjay - Part 2 (Sci-Fi, Thriller, War, 2015)
27		Screamers (Sci-Fi, Thriller, 1995)
27		The Scorch Trials (Action, Sci-Fi, Thriller, 2015)
27		The Rage: Carrie 2 (Horror, Sci-Fi, Thriller, 1999)
27		Red Planet (Action, Sci-Fi, Thriller, 2000)
27		The Thirteenth Floor (Mystery, Sci-Fi, Thriller, 1999)
27		Replicant (Action, Sci-Fi, Thriller, 2001)
27		Infini (Horror, Sci-Fi, Thriller, 2015)
27		Insurgent (Adventure, Sci-Fi, Thriller, 2015)
27		The One (Action, Sci-Fi, Thriller, 2001)
27		The Signal (Sci-Fi, Thriller, 2014)
27		The Cell (Horror, Sci-Fi, Thriller, 2000)
27		The Astronaut's Wife (Drama, Sci-Fi, Thriller, 1999)
27		Deep Blue Sea (Action, Sci-Fi, Thriller, 1999)
27		Altered States (Horror, Sci-Fi, Thriller, 1980)
27		Project Almanac (Sci-Fi, Thriller, 2015)
27		Mission to Mars (Adventure, Sci-Fi, Thriller, 2000)
27		Supernova (Horror, Sci-Fi, Thriller, 2000)
26		X-Men: Days of Future Past (Action, Adventure, Sci-Fi, Thriller, 2014)
25		The Thing (Horror, Mystery, Sci-Fi, Thriller, 2011)
25		Moonraker (Action, Adventure, Sci-Fi, Thriller, 1979)
25		Knowing (Drama, Mystery, Sci-Fi, Thriller, 2009)
24		The Man Who Knew Too Much (Drama, Thriller, 1956)
24		Machete (Action, Crime, Thriller, 2010)
24		Seraphim Falls (Action, Drama, Thriller, 2006)
24		The Shallows (Drama, Horror, Thriller, 2016)
24		THX 1138 (Crime, Drama, Sci-Fi, Thriller, 1971)
24		Octopussy (Action, Adventure, Thriller, 1983)
24		Tomorrow Never Dies (Action, Adventure, Thriller, 1997)
24		Never Say Never Again (Action, Adventure, Thriller, 1983)
24		Fast & Furious (Action, Crime, Thriller, 2009)
23		Bring Me the Head of Alfredo Garcia (Action, Crime, Drama, Thriller, 1974)
23		Inception (Action, Adventure, Sci-Fi, Thriller, 2010)
22		The Stepford Wives (Horror, Mystery, Sci-Fi, Thriller, 1975)
22		Live and Let Die (Action, Adventure, Thriller, 1973)
22		The Ipcress File (Thriller, 1965)
22		The Prestige (Drama, Mystery, Sci-Fi, Thriller, 2006)
22		The Time Machine (Adventure, Romance, Sci-Fi, Thriller, 1960)
22		Mad Max: Fury Road (Action, Adventure, Sci-Fi, Thriller, 2015)
22		Aliens (Action, Adventure, Sci-Fi, Thriller, 1986)
21		Ex Machina (Drama, Mystery, Sci-Fi, Thriller, 2015)
21		Man on Fire (Action, Crime, Drama, Thriller, 2004)
21		Memorîzu (Animation, Fantasy, Sci-Fi, Thriller, 1995)
21		Dr. No (Action, Adventure, Thriller, 1962)
21		The Abyss (Adventure, Drama, Sci-Fi, Thriller, 1989)
21		Predator (Action, Horror, Sci-Fi, Thriller, 1987)
21		The Eiger Sanction (Action, Thriller, 1975)
21		Mad Max 2: The Road Warrior (Action, Adventure, Sci-Fi, Thriller, 1981)
21		Minority Report (Action, Mystery, Sci-Fi, Thriller, 2002)
21		28 Days Later... (Drama, Horror, Sci-Fi, Thriller, 2002)
21		Rise of the Planet of the Apes (Action, Drama, Sci-Fi, Thriller, 2011)
21		Gravity (Adventure, Drama, Sci-Fi, Thriller, 2013)
21		Forbidden Planet (Action, Adventure, Sci-Fi, Thriller, 1956)
21		Serenity (Action, Adventure, Sci-Fi, Thriller, 2005)
21		Ghost in the Shell 2: Innocence (Animation, Drama, Sci-Fi, Thriller, 2004)
21		The Incredible Shrinking Man (Drama, Horror, Sci-Fi, Thriller, 1957)
21		The Hunger Games: Catching Fire (Adventure, Mystery, Sci-Fi, Thriller, 2013)

Notes: Movies similar to The Valley of Gwangi, Movies like The Valley of Gwangi, Western, Sci-Fi, Thriller, Jim O'Connolly, James Franciscus, Gila Golan, Richard Carlson, Laurence Naismith, Films, Video, Movie Similarities