Best movies like Of Unknown Origin

International terrorists attempt to kidnap a wealthy couple's child. Their plan comes unstuck when a deadly Black Mamba, sent by mistake instead of a harmless snake, escapes and the terrorists and several hostages are trapped in the boy's London home.

A set of vipers has been taken by scientists to mutate them to make a cure for cancer. As their experiment goes awry, the vipers escape into the woods - they're not only biting people, they're actually killing people, in a little town.

A social misfit, Willard is made fun of by his co-workers, and squeezed out of the company started by his deceased father by his boss. His only friends are a couple of rats he raised at home, Ben and Socrates. However, when one of them is killed at work, he goes on a rampage using his rats to attack those who have been tormenting him.

Desperate for companionship, the repressed Willard befriends a group of rats that inhabit his late father's deteriorating mansion. In these furry creatures, Willard finds temporary refuge from daily abuse at the hands of his bedridden mother and his father's old partner, Frank. Soon it becomes clear that the brood of rodents is ready and willing to exact a vicious, deadly revenge on anyone who dares to bully their sensitive new master.

Giant mutant rabbits terrorize the southwest.

A collection of short stories. In one a woman who leaves her house late at night to drive to the store while a killer is loose encounters some problems. In the second an arcade whiz kid's obsession with a game leads to deadly consequences. In the third a small town priest loses his faith and decides to leave town, but in the desert is stalked by a mysterious black pick-up truck. In the final story, a family's problem with a rat is larger than they think.

After witnessing the killing of his mate and offspring at the hands of a reckless Irish captain, a vengeful killer whale rampages through the fisherman's Newfoundland harbor. Under pressure from the villagers, the captain, a female marine biologist and an Indigenous tribalist venture after the great beast, who will meet them on its own turf.

A preacher whose ancestors were Druids battles Satan, who has taken the form of a huge snake.

A baby alligator is flushed down a toilet and survives by eating discarded lab animals that have been injected with growth hormones. The now gigantic animal escapes the city sewers and goes on a rampage, pursued by a cop and a big-game hunter.

One man's struggle to contain the curse he hides within... and his last-ditch attempt to free himself with the love of family. But when it looks as if he is losing his battle, and endangering all he holds most dear, the family dog, Thor, is the last hope for his family's survival... and the end to his Werewolf curse.

A platoon of eagles and vultures attacks the residents of a small town. Many people die. It's not known what caused the flying menace to attack. Two people manage to fight back, but will they survive Birdemic?

A platoon of eagles and vultures attack Hollywood, California. Why did the eagles and vultures attack? Who will survive?

An earthquake releases a strain of mutant cockroaches with the ability to start fires, which proceed to cause destructive chaos in a small town. The studies carried out by scientist James Parmiter, however, reveal an intent with much more far-reaching consequences.

Bugged! tells the story of a group of bumbling exterminators who are called over to the house of an attractive young novelist to rid her house of insects. Unfortunately, due to a horrible chemical mix-up, the poison spray causes the bugs to grow to enormous sizes, and pretty soon everyone's trapped inside the house and have to find a way to stop the dastardly pests before they start multiplying and take over the world.

The blood orchid - a rare flower that could hold the secret of eternal life and be worth a fortune to the company that finds it first. Led by a pharmaceutical research team, a scientific expedition sets out to go and explore deep into the jungles of Borneo to locate and bring back samples of the legendary plant. Battling through rainstorms to make their way upriver, the group encounters poisonous insects and a ferocious crocodile, only to discover they're being stalked by an even greater danger: a gathering of giant anacondas. Heat-sensing, fifty-foot-long flesh eaters that will go after anyone that crosses in their path.

A massive ball of furry creatures from another world eat their way through a small mid-western town followed by intergalactic bounty hunters opposed only by militant townspeople.

A lonely boy becomes good friends with Ben, a rat. This rat is also the leader of a pack of vicious killer rats, killing lots of people.

A Florida real estate developer and her captain lure investors to a property in the Everglades called Dreamland Shores, under false pretenses that the swampland will soon be developed. After the group arrives on a small island, they find it has been overrun by giant mutated ants, brought on by the dumping of toxic waste in the area.

The heat of a meteor crashing into the lake incubates a prehistoric egg, which grows into a plesiosaur-like monster that terrifies the community.

Corn grain contaminated with steroids produces large rats the size of small dogs who begin feeding on the residents of Toronto. Paul, a college basketball coach, teams up with Kelly, a local health inspector, to uncover the source of the mysterious rat attacks and they eventually try to prevent the opening of a new subway line as well as find the mutant rats nest quickly, or there will be a huge massacre of the entire city!

A friendly St. Bernard named "Cujo" contracts rabies and conducts a reign of terror on a small American town.

John Hall is a drifter who wanders into a small town in Maine. He needs a job and decides to seek employment at the community's top business: a large textile mill. He is hired to work the "graveyard shift" -- from around midnight to dawn -- and, along with a few others, he is charged with cleaning out the basement. This task strikes the workers as simple enough, but then, as they proceed deeper underground, they encounter an unspeakable monstrosity intent on devouring them all.

A "National Geographic" film crew is taken hostage by an insane hunter, who takes them along on his quest to capture the world's largest - and deadliest - snake.

Morgan and his friends are on a hunting trip on a remote Canadian island when they are attacked by a swarm of giant wasps. Looking for help, Morgan stumbles across a barn inhabited by an enormous killer chicken. After doing some exploring, they discover the entire island is crawling with animals that have somehow grown to giant size. The most dangerous of all of these, however, are the rats, who are mobilizing to do battle with the human intruders.

A dog turns from man's best friend into man's worst nightmare as he attacks everything that moves.

A man enclosed in a plastic bubble, his sister, and their best friend must defend an apartment complex from the mutant Judas Breed insects.

Using fossilized DNA, a scientist resurrects one of nature's most fearsome predators, a sabretooth tiger. Scientific ambition turns deadly, however, when the creature escapes and begins savagely stalking its prey - the human race.

People are dying mysteriously and gruesomely, and nobody has a clue what the cause is. Only health worker Mike Brady has a possible solution, but his theory of killer slugs is laughed at by the authorities. Only when the body count begins to rise and a slug expert from England begins snooping around does it begin to look like Mike had the right idea after all.

Teens camping in a northern California retreat are terrorized by mutant insects created by evil, polluting pot farmers.

Hick handymen Val McKee and Earl Bassett can barely eke out a living in the Nevada hamlet of Perfection, so they decide to leave town -- despite an admonition from a shapely seismology coed who's picking up odd readings on her equipment. Before long, Val and Earl discover what's responsible for those readings: 30-foot-long carnivorous worms with a proclivity for sucking their prey underground.

A group of mutant gators attack the cajun people. Pouring blue chemicals in a Louisiana swamp causes the alligator population to morph into monstrous creatures including a clan of cajuns living in the bayou.

SWAMP DEVIL is the story of young Melanie Blaime (Cindy Sampson) and her father Howard (Bruce Dern). After a long estrangement from her father for reasons not entirely clear, Melanie returns to her childhood home of Gibbington, Vermont to confront the realization that her father is wanted for murder. As Melanie digs a little more deeply into the stories of the past, she uncovers a tale wound about the town like Spanish moss, composed of secrets and lies, murder and revenge.

A gigantic serpent is captured on a remote island and shipped to an American college for experimentation.

After the mayor uses a potentially dangerous substance to protect the local plantation, the lakeside town of Mountview, in California, is attacked by a lethal species of large cockroach. After some of the town's inhabitants are killed, the mayor enlists the help of eccentric pest exterminator General George S. Merlin in order to prevent further harm to the local dwellers.

When the Haskin family seeks refuge from Y2K hysteria in the isolated forests of the Sierra Diablos mountains, madness and terror find them there. Abducted by a vicious hillbilly clan, the Haskins fight for survival, but neither they nor the hillbilly Crawfords can comprehend the monstrous nightmare about to erupt from the bowels of the earth.

A horde of rattlesnakes inexplicably descends into Eden Valley, terrorizing an isolated family and forcing them to fight for their lives.

A group of utility workers are trapped in a series of tunnels which, unfortunately, contain a scientist mutated by his own creation. The creature feeds instantly on a rat, becoming what it has eaten.

The U.S. Navy's special group "Blue Water" builds a half-shark, half-octopus for combat. But the sharktopus escapes and terrorizes the beaches of Puerto Vallarta.

A giant grizzly bear stalks 8 troubled young adults and a park ranger in a forest reserve called Grizzly Park after making the demise of an escaped serial killer.

A weekend at a lake house in the Louisiana Gulf turns into a nightmare for seven vacationers as they are subjected to fresh-water shark attacks.

When an oil company unwittingly unleashes a prehistoric shark from its icy prison, the Jurassic killer maroons a group of art thieves and a group of college students on an abandoned island

When a mad scientist mixes the genes of a killer whale and a wolf, it creates the Whalewolf, and it's up to Sharktopus to stop it.

After accidentally killing a bear cub while celebrating graduation in the woods, four teens become the target of a seemingly unstoppable Grizzly.

Horror tale of insects which eat their victims from the inside out.

A young teenager travels to Florida, unknowing that a group of dangerous tiger sharks are ravaging the beach.

After her lousy stepfather steals her savings to buy a vicious tiger, Kelly loses all hope of going to college. But Kelly's situation worsens when a hurricane leaves her and her autistic brother boarded up in their house with the man-eating beast. This edge-of-your-seat thriller follows the gutsy heroine and her younger sibling as they struggle to outwit the ravenous predator and find a way to survive.

A clan of evil rats overtakes a Manhattan department store and threatens to overrun the city.

A DNA experiment on a rare breed of spider is taking place on a NASA space shuttle, when a freak meteor shower engulfs the shuttle, causing everything to go horribly wrong. One survivor is found on the ship and watched over in a secret location deep in the California desert. The problem continues, as the survivor isn't alone, as another deadly spiders climbs out of him and goes on a rampage around the ship. Curious reporter Marci Eyre must now survive, escape and warn everyone before the spider reaches outside the desert.

A computer whiz named 'Bean' is among several people found dead with strange striations, odd puncture wounds and missing internal organs. Bean's brother Ted teams up with detective Gina to get to the bottom of it. With the help of a computer hacker, they find a blueprint that reveals the killer who has been terrorizing the city...a rampaging posse of genetically mutated cockroaches!

Cami is a dedicated student of entomology that is researching insects in her sorority house. When her sorority sister Josi sprays insecticide on her bugs, Cami becomes upset. But sooner she learns that the insects had grown bigger and bigger and she and her sisters are under siege by the insects. Further, Josi is the host of the breed of mutant insects that are very hungry.