Movies Like Octaman

If you liked Octaman (1971), a horror and science fiction movie directed by Harry Essex, here are 20 movies with a similar feel, based on TMDB's recommendations. Each one links to its cast, trailer and where it's streaming.

1
Underwater (2020)
★ 6.3/10Also horror and science fiction
After an earthquake destroys their underwater station, six researchers must navigate two miles along the dangerous, unknown depths of the ocean floor to make it to safety in a race against time.
2
The Last House (2026)
★ 6.8/10Also horror and science fiction
A family suddenly sealed inside their home must work together to survive against dwindling resources and the ominous threat keeping them trapped.
3
The Asphyx (1972)
★ 6/10Also horror and science fiction
Hugo is a brilliant turn-of-the-century scientist, loved and respected by his family and friends, admired by his colleagues. But he is a man quickly becoming obsessed with a curious and frightening question...What is…
4
Gemini Man (2019)
★ 6.3/10Also science fiction
Henry Brogan is an elite 51-year-old assassin who's ready to call it quits after completing his 72nd job. His plans get turned upside down when he becomes the target of a mysterious operative who can seemingly predict…
5
The Car (1977)
★ 6.4/10Also horror
The Utah community of Santa Ynez is being terrorized by a mysterious black coupe that appears out of nowhere and begins running people down. After the car kills off the town sheriff, Captain Wade Parent is determined…
6
Rampage (2018)
★ 6.5/10Also science fiction
Primatologist Davis Okoye shares an unshakable bond with George, the extraordinarily intelligent, silverback gorilla who has been in his care since birth. But a rogue genetic experiment gone awry mutates this gentle…
7
Them! (1954)
★ 6.8/10Also science fiction and horror
As a result of nuclear testing, gigantic, ferocious mutant ants appear in the American desert southwest, and a father-daughter team of entomologists join forces with the state police officer who first discovers their…
8
Island of Terror (1966)
★ 5.9/10Also horror and science fiction
When a small island community becomes overrun with creeping, blobbish, tentacled monsters that liquefy and digest the bones from living creatures, the community struggles to fight back.
9
Silver Bullet (1985)
★ 6.7/10Also horror
The small city of Tarker's Mills is startled by a series of sadistic murders. The population fears the work of a maniac, but sightings of a mysterious, hairy creature soon spread. People lock themselves up at night…
10
The Host (2013)
★ 6.3/10Also science fiction
A parasitic alien soul is injected into the body of Melanie Stryder. Instead of carrying out her race's mission of taking over the Earth, "Wanda" (as she comes to be called) forms a bond with her host and sets out to…
11
The End of Oak Street (2026)
★ 7.1/10Also science fiction
After a mysterious cosmic event rips Oak Street from suburbia and transports their neighborhood to someplace unknown, the Platt family soon discovers that their very survival depends on them sticking together as they…
12
Phase IV (1974)
★ 6.3/10Also horror and science fiction
Arizona ants mock the food chain on their way to a desert lab to get two scientists and a woman.
13
Hulk vs. Wolverine (2009)
★ 7.1/10Also science fiction
Department H sends in Wolverine to track down a mysterious beast known by the US Military as the Hulk, who is rampaging across the Canadian wilderness. Surveying the extent of the damage to a destroyed town, Wolverine…
14
The Blob (1958)
★ 6.2/10Also horror and science fiction
A drive-in favorite, this sci-fi classic follows teenagers Steve and his best girl, Jane, as they try to protect their hometown from a gelatinous alien life form that engulfs everything it touches. The first to…
15
Basilisk: The Serpent King (2006)
★ 6.2/10Also horror
Two millennia ago, a Lybian king has a basilisk (snake-shaped dragon), which petrifies people, subjected to the same fate with a golden scepter during a solar eclipse. Both these and several victims are dug up by…
16
Mass Effect: Paragon Lost (2012)
★ 6.2/10Also science fiction
An untold chapter in the Mass Effect saga, following the early career of Alliance Marine, James Vega, as he leads a squad of elite special forces into battle against a mysterious alien threat known as The Collectors…
17
X-Men: Apocalypse (2016)
★ 6.5/10Also science fiction
After the re-emergence of the world's first mutant, world-destroyer Apocalypse, the X-Men must unite to defeat his extinction level plan.
18
Siren (2016)
★ 5.9/10Also horror
A bachelor party becomes a savage fight for survival when the groomsmen unwittingly unleash a fabled predator upon the festivities.
19
Justice League (2017)
★ 6.1/10Also science fiction
Fuelled by his restored faith in humanity and inspired by Superman's selfless act, Bruce Wayne and Diana Prince assemble a team of metahumans consisting of Barry Allen, Arthur Curry and Victor Stone to face the…
20
X-Men: Days of Future Past (2014)
★ 7.5/10Also science fiction
The ultimate X-Men ensemble fights a war for the survival of the species across two time periods as they join forces with their younger selves in an epic battle that must change the past – to save our future.