Most Similar Movies to Watchers (1988)
If you are looking for movies like Watchers (1988), you might like movies tagged with keyword : teen boy, dog, government agent, scientist, monster, outlandish, tense, gory, creepy, suburbia, cabin, woods, laboratory, mutation, government secrets, experiments, animals attacking, human-animal friendship, animal intelligence, adventure, underdog, metamorphosis, 1980s .
Man's Best Friend (1993), Bats (1999), Critters 2 (1988), Arachnophobia (1990), Mega Piranha (2010), Cujo (1983), Game of Werewolves (2011) ... Let's take a look at the following list...

Man's Best Friend (1993)
A reporter (Ally Sheedy) learns about her new pet, a DNA-altered killer dog she freed from a research lab.
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Bats (1999)
Genetically mutated bats escape and it's up to a bat expert and the local sheriff to stop them.
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Critters 2 (1988)
Eggs of the small, furry alien carnivores are left behind on Earth and, after hatching, again set their appetites on the town of Grover's Bend.
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Arachnophobia (1990)
A species of South American killer spider hitches a lift to the U.S. in a coffin and starts to breed and kill.
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Mega Piranha (2010)
A mutated strain of giant and ferocious Amazonian piranha escape from the jungle rivers and eat their way toward Florida.
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Cujo (1983)
Cujo, a friendly St. Bernard, contracts rabies and conducts a reign of terror on a small American town.
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Game of Werewolves (2011)
After 15 years, Tomas, a not very succesfull writer, comes back to the village in Galicia where his family comes from, Arga, apparently to get an award. But he doesn't know the real reason why he is there, to end with an old curse that is been haunting the village for the last hundred years.
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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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The Relic (1997)
A homicide detective and an anthropologist try to destroy a South American lizard-like god, who's on a people eating rampage in a Chicago museum.
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Swamp Thing (1982)
After a violent incident with a special chemical, a research scientist is turned into a swamp plant monster.
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DeepStar Six (1989)
A team of navy personnel stationed at a temporary base at the bottom of the ocean and tasked with setting up nuclear missiles discovers a huge underwater cavern which houses a giant prehistoric creature.
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Attack of the Killer Tomatoes! (1978)
A group of scientists band together to save the world from mutated killer tomatoes.
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The Bone Snatcher (2003)
After miners disappear in the Namib Desert, scientists find their remains and seek to find what killed them.
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Lake Placid 2 (2007)
A sheriff, a big-game hunter and a wildlife officer try to kill three giant crocodiles.
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Crocodile 2: Death Swamp (2002)
A criminal carrying stolen money and gold hijacks a plane that crashes in a Mexican swamp, where the survivors are terrorized by a giant crocodile.
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The Hills Have Eyes Part II (1985)
A group of bikers, heading to a race, become stranded in the desert and find themselves fighting off a family of inbred cannibals who live off the land.
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Gremlins 2: The New Batch (1990)
The Gremlins are back, and this time, they've taken control of a New York City media mogul's high-tech skyscraper.
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Mimic 2 (2001)
Investigating three faceless corpses, a detective (Bruno Campos) considers a teacher (Alix Koromzay) at an inner-city high school the prime suspect.
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