90		The Secret of Treasure Island (Action, Adventure, Crime, Sci-Fi, 1938)
74		The Lost World (Adventure, Fantasy, Sci-Fi, 1960)
73		Bruce Gentry (Action, Adventure, Crime, Sci-Fi, 1949)
70		Deep Rising (Action, Adventure, Horror, Sci-Fi, 1998)
69		Sky Bandits (Action, Music, Sci-Fi, 1940)
69		Fury of the Congo (Action, Adventure, Crime, Sci-Fi, 1951)
69		Brick Bradford (Action, Adventure, Sci-Fi, 1947)
68		Mysterious Island (Adventure, Family, Sci-Fi, 1961)
63		The Man from Planet X (Horror, Romance, Sci-Fi, 1951)
62		Forbidden Planet (Action, Adventure, Sci-Fi, 1956)
60		20,000 Leagues Under the Sea (Adventure, Drama, Family, Sci-Fi, 1954)
60		Manhunt of Mystery Island (Action, Sci-Fi, 1945)
57		The Satan Bug (Crime, Mystery, Sci-Fi, 1965)
57		Pacific Rim (Action, Adventure, Sci-Fi, 2013)
57		The Mysterious Island (Adventure, Romance, Sci-Fi, 1929)
55		The Island at the Top of the World (Adventure, Family, Fantasy, Sci-Fi, 1974)
55		Treasure Planet (Animation, Adventure, Family, Sci-Fi, 2002)
55		Return of the Ape Man (Horror, Romance, Sci-Fi, 1944)
55		Who Am I? (Action, Adventure, Comedy, Sci-Fi, 1998)
55		Dr. Renault's Secret (Horror, Mystery, Romance, Sci-Fi, 1942)
55		Titan A.E. (Animation, Action, Adventure, Sci-Fi, 2000)
53		Flight That Disappeared (Adventure, Fantasy, Sci-Fi, 1961)
53		Planet of the Apes (Adventure, Romance, Sci-Fi, 1968)
52		Journey to the Center of the Earth (Adventure, Family, Fantasy, Sci-Fi, 1959)
52		Attack of the Crab Monsters (Horror, Sci-Fi, 1957)
52		The Time Machine (Sci-Fi, Adventure, Action, 2002)
52		Latitude Zero (Action, Adventure, Sci-Fi, 1969)
52		The Day After Tomorrow (Action, Adventure, Sci-Fi, 2004)
50		Red Snow (Action, Adventure, Drama, Sci-Fi, 1952)
50		Mothra (Fantasy, Sci-Fi, Thriller, 1961)
50		The Abominable Snowman (Adventure, Horror, Sci-Fi, 1957)
50		Interstellar (Adventure, Drama, Sci-Fi, 2014)
49		Sphere (Drama, Mystery, Sci-Fi, 1998)
49		Creature from the Black Lagoon (Horror, Sci-Fi, 1954)
49		The Flesh Eaters (Comedy, Horror, Sci-Fi, 1964)
49		Zombies of the Stratosphere (Action, Sci-Fi, 1952)
49		The Machine (Action, Drama, Sci-Fi, 2013)
49		Mad Max: Fury Road (Action, Adventure, Sci-Fi, 2015)
48		Panther Girl of the Kongo (Action, Sci-Fi, 1955)
48		Godzilla, King of the Monsters! (Action, Horror, Sci-Fi, 1956)
47		Captain America: The First Avenger (Action, Adventure, Sci-Fi, 2011)
47		Waterworld (Action, Adventure, Sci-Fi, 1995)
47		Returner (Action, Adventure, Sci-Fi, 2002)
45		Virus (Action, Horror, Thriller, Sci-Fi, 1999)
45		Leviathan (Adventure, Horror, Mystery, Sci-Fi, 1989)
45		Our Man Flint (Action, Adventure, Comedy, Sci-Fi, 1966)
45		Atlantis: The Lost Empire (Animation, Action, Adventure, Sci-Fi, 2001)
45		X2 (Action, Adventure, Fantasy, Sci-Fi, 2003)
44		DeepStar Six (Action, Horror, Sci-Fi, 1989)
44		Immediate Disaster (Sci-Fi, 1954)
44		Abbott and Costello Meet Frankenstein (Comedy, Fantasy, Horror, Sci-Fi, 1948)
43		The Abyss (Adventure, Drama, Sci-Fi, 1989)
43		Iron Man (Action, Adventure, Sci-Fi, 2008)
42		The Lost World: Jurassic Park (Action, Adventure, Sci-Fi, 1997)
42		Warlords of the Deep (Fantasy, Adventure, Sci-Fi, 1978)
42		The Deadly Mantis (Horror, Sci-Fi, Thriller, 1957)
42		20,000 Leagues Under the Sea (Action, Adventure, Sci-Fi, 1916)
42		Superman Returns (Action, Adventure, Sci-Fi, 2006)
42		Space Raiders (Action, Adventure, Sci-Fi, 1983)
42		Star Trek: Nemesis (Action, Adventure, Sci-Fi, 2002)
42		Android (Crime, Sci-Fi, 1982)
42		The Core (Action, Adventure, Sci-Fi, 2003)
42		The Fighting Devil Dogs (Adventure, Sci-Fi, War, 1943)
42		Undersea Kingdom (Sci-Fi, Adventure, 1936)
41		Destination Moon (Adventure, Drama, Sci-Fi, 1950)
41		Creature with the Atom Brain (Crime, Horror, Sci-Fi, 1955)
41		Gorgo (Action, Drama, Horror, Sci-Fi, 1961)
40		Escape Plan (Action, Crime, Mystery, Sci-Fi, 2013)
40		Operation Atlantis (Adventure, Crime, Sci-Fi, 1965)
40		Underworld: Rise of the Lycans (Action, Adventure, Fantasy, Sci-Fi, 2009)
40		Wedlock (Action, Crime, Drama, Sci-Fi, 1991)
40		The Island of Dr. Moreau (Adventure, Fantasy, Horror, Sci-Fi, 1977)
40		Thunderbirds (Action, Adventure, Comedy, Sci-Fi, 2004)
40		The Green Hornet (Adventure, Crime, Drama, Sci-Fi, 1940)
40		Beyond Re-Animator (Comedy, Crime, Horror, Sci-Fi, 2003)
40		Suicide Squad (Action, Adventure, Crime, Sci-Fi, 2016)
40		Retroactive (Action, Crime, Drama, Sci-Fi, 1997)
40		Blake of Scotland Yard (Adventure, Crime, Sci-Fi, 1937)
40		Suchîmubôi (Animation, Action, Adventure, Sci-Fi, 2004)
40		Dr. Cyclops (Adventure, Drama, Horror, Sci-Fi, 1940)
40		The Mad Doctor of Market Street (Comedy, Drama, Horror, Sci-Fi, 1942)
40		Underdog (Action, Adventure, Comedy, Sci-Fi, 2007)
40		Resident Evil: Afterlife (Action, Adventure, Horror, Sci-Fi, 2010)
40		The Transformers: The Movie (Animation, Action, Adventure, Sci-Fi, 1986)
39		Double Team (Action, Comedy, Sci-Fi, 1997)
39		Buck Rogers (Romance, Sci-Fi, 1977)
39		Pitch Black (Horror, Sci-Fi, 2000)
39		Attack the Block (Action, Comedy, Sci-Fi, 2011)
39		The Arrival (Sci-Fi, Thriller, 1996)
39		Piranha (Comedy, Horror, Sci-Fi, 1978)
39		The Cosmic Man (Adventure, Sci-Fi, Thriller, 1959)
39		The Lawnmower Man (Horror, Sci-Fi, 1992)
39		Universal Soldier (Action, Sci-Fi, Thriller, 1992)
39		Firestarter (Action, Horror, Sci-Fi, 1984)
39		Sleeper (Comedy, Sci-Fi, 1973)
39		Man Made Monster (Drama, Horror, Sci-Fi, 1941)
39		F. P. 1 Doesn't Answer (Fantasy, Sci-Fi, 1933)
38		Revenge of the Creature (Horror, Sci-Fi, 1955)
37		THX 1138 (Crime, Drama, Sci-Fi, 1971)
37		TRON (Action, Adventure, Sci-Fi, 1982)
37		Fortress (Action, Crime, Sci-Fi, 1992)
37		Battleship (Action, Adventure, Sci-Fi, 2012)
37		Pete Winning and the Pirates: The Motion Picture (Action, Adventure, Sci-Fi, 2015)
37		Logan's Run (Action, Adventure, Sci-Fi, 1976)
37		RoboCop 2 (Action, Crime, Sci-Fi, 1990)
37		John Carter (Action, Adventure, Sci-Fi, 2012)
37		Superman (Sci-Fi, 1948)
37		Vice (Action, Adventure, Sci-Fi, 2015)
37		Fantastic Voyage (Adventure, Family, Sci-Fi, 1966)
37		Dr. Who and the Daleks (Adventure, Family, Sci-Fi, 1965)
37		First Men in the Moon (Adventure, Sci-Fi, 1964)
37		TRON (Action, Adventure, Sci-Fi, 2010)
37		RoboCop (Action, Crime, Sci-Fi, 2014)
37		Independence Day (Action, Adventure, Sci-Fi, 1996)
37		The Spy Who Loved Me (Action, Adventure, Sci-Fi, 1977)
35		Total Recall (Action, Adventure, Mystery, Sci-Fi, 2012)
35		Murderers' Row (Action, Adventure, Comedy, Sci-Fi, 1966)
35		Thor: The Dark World (Action, Adventure, Fantasy, Sci-Fi, 2013)
35		Escape from Planet Earth (Animation, Adventure, Comedy, Sci-Fi, 2013)
35		Nosferatu vs. Father Pipecock & Sister Funk (Adventure, Comedy, Fantasy, Sci-Fi, 2014)
35		Reptilicus (Action, Horror, Sci-Fi, 1961)
35		Time Bandits (Adventure, Comedy, Fantasy, Sci-Fi, 1981)
35		Final Fantasy: The Spirits Within (Animation, Action, Adventure, Sci-Fi, 2001)
35		Pixels (Animation, Action, Comedy, Sci-Fi, 2015)
35		Air Hawks (Action, Drama, Mystery, Sci-Fi, 1935)
35		Lilo & Stitch (Animation, Adventure, Comedy, Sci-Fi, 2002)
35		Darkman (Action, Crime, Fantasy, Sci-Fi, 1990)
35		Teenage Mutant Ninja Turtles II: The Secret of the Ooze (Action, Adventure, Comedy, Sci-Fi, 1991)
35		Spy Kids 2: Island of Lost Dreams (Action, Adventure, Comedy, Sci-Fi, 2002)
35		Honey, I Shrunk the Kids (Adventure, Comedy, Family, Sci-Fi, 1989)
35		Sky Captain and the World of Tomorrow (Action, Adventure, Mystery, Sci-Fi, 2004)
35		Batman: The Killing Joke (Animation, Action, Crime, Sci-Fi, 2016)
35		Doctor X (Comedy, Crime, Horror, Sci-Fi, 1932)
35		Island of Lost Souls (Horror, Sci-Fi, 1932)
35		Enemy Mine (Action, Adventure, Drama, Sci-Fi, 1985)
35		Cumulus 9 (Action, Adventure, Fantasy, Sci-Fi, 1992)
34		Deep Blue Sea (Action, Sci-Fi, Thriller, 1999)
34		Cube (Mystery, Sci-Fi, Thriller, 1997)
34		Flying Disc Man from Mars (Action, Adventure, Crime, Sci-Fi, 1950)
34		Five Million Years to Earth (Horror, Mystery, Sci-Fi, 1967)
34		The Last Days of Man on Earth (Sci-Fi, Thriller, 1973)
34		The Final Countdown (Action, Sci-Fi, 1980)
34		Nightmare City (Action, Horror, Sci-Fi, 1980)
34		Island Claws (Horror, Sci-Fi, 1980)
34		The Whip Hand (Action, Adventure, Crime, Sci-Fi, 1951)
34		The Black Hole (Action, Sci-Fi, 1979)
34		I Am Legend (Drama, Horror, Sci-Fi, 2007)
34		Turkey Shoot (Drama, Horror, Sci-Fi, 1982)
34		Bug (Sci-Fi, Horror, Mystery, 1975)
34		The Invisible Monster (Action, Adventure, Crime, Sci-Fi, 1950)
34		Harbinger Down (Horror, Sci-Fi, 2015)
34		The Clones (Action, Sci-Fi, 1973)
34		Escape from New York (Action, Sci-Fi, 1981)
34		The Maze Runner (Action, Mystery, Sci-Fi, 2014)
34		Another World (Action, Horror, Sci-Fi, 2014)
33		This Island Earth (Horror, Mystery, Sci-Fi, 1955)
33		It Came from Beneath the Sea (Horror, Sci-Fi, 1955)
33		Batman and Robin (Action, Adventure, Crime, Sci-Fi, 1949)
33		Star Wars: Episode V - The Empire Strikes Back (Action, Adventure, Fantasy, Sci-Fi, 1980)
33		Master of the World (Sci-Fi, Adventure, 1961)
33		Tarantula (Horror, Sci-Fi, 1955)
32		Silver Needle in the Sky (Adventure, Family, Sci-Fi, 1954)
32		Paul (Adventure, Comedy, Sci-Fi, 2011)
32		Escape from L.A. (Action, Adventure, Sci-Fi, 1996)
32		The Beast from 20,000 Fathoms (Adventure, Horror, Sci-Fi, 1953)
32		The Crimson Ghost (Action, Adventure, Crime, Sci-Fi, 1946)
32		Godzilla (Action, Adventure, Sci-Fi, 2014)
32		The Chronicles of Riddick (Action, Adventure, Sci-Fi, 2004)
32		War of the Worlds (Adventure, Sci-Fi, Thriller, 2005)
32		The Diamond Wizard (Crime, Sci-Fi, Drama, 1954)
32		Star Wars: Episode VI - Return of the Jedi (Action, Adventure, Fantasy, Sci-Fi, 1983)
32		Time Runner (Action, Adventure, Sci-Fi, 1993)
32		Green Lantern (Action, Adventure, Sci-Fi, 2011)
32		Neon City (Action, Adventure, Sci-Fi, 1991)
32		Battlestar Galactica (Action, Adventure, Sci-Fi, 1978)
32		Jungle Jim in the Forbidden Land (Sci-Fi, Adventure, 1952)
32		Zpívající pudrenka (Comedy, Crime, Family, Sci-Fi, 1960)
32		The Cannibal in the Jungle (Crime, Horror, Sci-Fi, 2015)
32		Saturn 3 (Adventure, Sci-Fi, Thriller, 1980)
32		The Incredible Hulk (Action, Adventure, Sci-Fi, 2008)
32		Split (Action, Crime, Sci-Fi, 2004)
32		Killer Ape (Adventure, Sci-Fi, 1953)
31		Paprika (Animation, Adventure, Crime, Sci-Fi, 2006)
31		Dick Barton at Bay (Crime, Sci-Fi, 1950)
31		Jungle Manhunt (Adventure, Sci-Fi, 1951)
31		Captain Video, Master of the Stratosphere (Sci-Fi, Adventure, 1951)
31		World Without End (Adventure, Romance, Sci-Fi, 1956)
31		Beyond the Time Barrier (Romance, Sci-Fi, 1960)
31		Savage Fury (Adventure, Sci-Fi, 1956)
31		Raiders of the River (Crime, Sci-Fi, 1956)
31		Two Lost Worlds (Adventure, Romance, Sci-Fi, 1951)
31		Lost Planet Airmen (Action, Crime, Sci-Fi, 1951)
30		Fury of the Dragon (Action, Adventure, Crime, Sci-Fi, 1976)
30		Mysterious Doctor Satan (Adventure, Action, Crime, Sci-Fi, 1940)
30		The Island (Action, Adventure, Romance, Sci-Fi, 2005)
30		Thor (Action, Adventure, Fantasy, Sci-Fi, 2011)
30		Dick Barton Strikes Back (Action, Crime, Sci-Fi, 1949)
30		Curse of the Faceless Man (Adventure, Horror, Sci-Fi, 1958)
30		The Time Machine (Adventure, Romance, Sci-Fi, 1960)
30		Shank (Action, Comedy, Crime, Sci-Fi, 2010)
30		Jimmy Neutron: Boy Genius (Animation, Action, Adventure, Sci-Fi, 2001)
30		Blue Thunder (Action, Crime, Drama, Sci-Fi, 1983)
30		Escape to Witch Mountain (Adventure, Family, Fantasy, Sci-Fi, 1975)
30		The Green Hornet Strikes Again! (Action, Adventure, Crime, Sci-Fi, 1940)
30		From the Earth to the Moon (Adventure, Fantasy, Sci-Fi, 1958)
30		City of Ember (Adventure, Family, Fantasy, Sci-Fi, 2008)
30		Captain Nemo and the Underwater City (Adventure, Family, Fantasy, Sci-Fi, 1969)
30		Patch Town (Adventure, Comedy, Fantasy, Sci-Fi, 2014)
30		Detective Lloyd (Action, Adventure, Crime, Sci-Fi, 1932)
30		Some Girls Do (Action, Adventure, Comedy, Sci-Fi, 1969)
30		Batman (Action, Adventure, Crime, Sci-Fi, 1943)
30		Motorama (Adventure, Comedy, Crime, Sci-Fi, 1991)
30		The Land Unknown (Adventure, Fantasy, Sci-Fi, 1957)
30		The Electronic Monster (Crime, Mystery, Sci-Fi, 1958)
30		Pokémon: The First Movie - Mewtwo Strikes Back (Animation, Action, Adventure, Sci-Fi, 1998)
30		Lemon Grove Kids Meet the Monsters (Adventure, Comedy, Crime, Sci-Fi, 1965)
30		The Philadelphia Experiment (Adventure, Drama, Romance, Sci-Fi, 1984)
30		Queen of Outer Space (Adventure, Fantasy, Sci-Fi, 1958)
30		Non-Stop New York (Crime, Drama, Romance, Sci-Fi, 1937)
30		Lost in Space (Action, Adventure, Family, Sci-Fi, 1998)
30		The Rocketeer (Action, Adventure, Comedy, Sci-Fi, 1991)

Notes: Movies similar to Port Sinister, Movies like Port Sinister, Adventure, Crime, Sci-Fi, Harold Daniels, James Warren, Lynne Roberts, Paul Cavanagh, William Schallert, SF, Science Fiction, SciFi, Sci Fi, Films, Video, Movie Similarities