Most Similar Movies to The Fly II (1989)
If you are looking for movies like The Fly II (1989), you might like movies tagged with keyword : sci-fi, horror, thriller, mutation, monster, body horror, scientist, laboratory, father-son relationship, revenge, tragedy, isolation, science ethics, sequel, dark, violence, gore, psychological horror, experiment gone wrong, survival .
The Fly (1986), Species III (2004), Leviathan (1989), Jason X (2001), The Fly (1958), Island of Terror (1966), Forbidden World (1982) ... Let's take a look at the following list...

The Fly (1986)
A brilliant but eccentric scientist begins to transform into a giant man/fly hybrid after one of his experiments goes horribly wrong.
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Species III (2004)
An alien hybrid beauty (Sunny Mabrey) follows her overwhelming, but deadly, urge to mate while commandos hunt her down.
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Leviathan (1989)
An American deep-sea mining colony stumbles upon a sunken Soviet vessel hiding a horrific secret.
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Jason X (2001)
Jason Voorhees returns with a new look, a new machete, and his same murderous attitude as he is awakened on a spaceship in the 25th century.
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The Fly (1958)
A scientist has a horrific accident when he tries to use his newly invented teleportation device.
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Island of Terror (1966)
Grisly deaths bring a scientist to a remote island where researchers have accidentally created a deadly life form.
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Forbidden World (1982)
In the distant future, a federation marshal arrives at a research lab on a remote planet where a genetic experiment has gotten loose and begins feeding on the dwindling scientific group.
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Alien (1979)
After a space merchant vessel perceives an unknown transmission as a distress call, its landing on the source moon finds one of the crew attacked by a mysterious lifeform, and they soon realize that its life cycle has merely begun.
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Screamers: The Hunting (2009)
A rescue team encounters a race of half-human, half-machine hybrids on a distant planet.
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The Terror Within (1989)
When a chemical warfare leaves the world barren and filled with mutated monsters, a band of survivors in a underground complex battles one of the creatures who was able to break in.
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Almost Human (2013)
Mark Fisher disappeared from his home in a brilliant flash of blue light almost 2 years ago. His friend Seth Hampton was the last to see him alive. Now a string of grisly, violent murders leads Seth to believe that Mark is back, and something evil is inside of him.
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The Dark Lurking (2010)
At a top-secret research facility located one mile beneath the surface of the earth, a team of technicians unwittingly sets free an ancient evil, spawning a monstrous horde of vicious creatures that decimates the population of the sprawling underground city and cuts off all communications with the outside. A small group of survivors, led by mercenary Michaels (Bret Kennedy) and including amnesiac patient Lena (Tonia Renee), must fight through 13 levels of bloodthirsty monsters to reach freedom.
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Specimen (1996)
After his grandmother's death, 24-year-old Mike Hillary sets off in search of who he thinks is his real father. Little does he suspect the real scenario: his late mother was impregnated by aliens, and now they've sent someone down to bring back their "specimen"--dead or alive.
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Mutants (2008)
Braylon (Richard Zeringue), the scheming CEO of the Just Rite Sugar Company, has a new goal on his mind: the creation of a sweet new additive that will be incredibly addictive for consumers. And with the help of security man Commander Sykes (Tony Senzamici), Braylon begins experimenting on humans. But something goes horribly wrong, turning unwitting test subjects into dangerous, mindless freaks. As the mutation spreads rapidly and the bodies pile up, Sykes tries to quell the outbreak.
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Carnosaur 3: Primal Species (1996)
International terrorists get a surprise when their cargo turns out to contain living dinosaurs. The army commando team now have to think fast, if they want to prevent the extinction of the human species, instead of the reptiles.
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Predator 2 (1990)
Amidst a territorial gang war in 1997, a sophisticated alien hunter stalks the citizens of Los Angeles and the only man between him and his prey is veteran L.A.P.D. officer, Lieutenant Mike Harrigan.
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Sputnik (2020)
Summoned to a secluded research facility, a controversial young doctor examines a cosmonaut who returned to Earth with an alien parasite inside of him.
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Outpost: Rise of the Spetsnaz (2013)
In this third installment of the hit Nazi Zombie action horror movie, Outpost: Rise Of The Spetnaz, we discover the horrifying origins of these supernatural soldiers and see them in ferocious gladiatorial battle against the most ruthless and notorious of all military special forces: the Russian Spetsnaz.
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