Best movies like The Alien Within

Marines on a deserted island are ordered to defuse bombs, but then an alien creature terrorizes them.

When the crew of an American tugboat boards an abandoned Russian research vessel, the alien life form aboard regards them as a virus which must be destroyed.

In 2020, after the colonization of the moon, the spaceships Vega, Sirius and Capella are launched from Lunar Station 7. They are to explore Venus under the command of Professor Hartman, but an asteroid collides and explodes Capella. The leader ship Vega stays orbiting and sends the astronauts Kern and Sherman with the robot John to the surface of Venus, but they have problems with communication with Dr. Marsha Evans in Vega. The Sirius lands in Venus and Commander Brendan Lockhart, Andre Ferneau and Hans Walter explore the planet and are attacked by prehistoric animals. They use a vehicle to seek Kern and Sherman while collecting samples from the planet. Meanwhile John helps the two cosmonauts to survive in the hostile land.

A spaceship is sent to Mars after a alien distress signal is picked up. They find one survivor, but when a crew member is found drained of blood it's evident they have rescued a bloodsucking monster.

A civilian oil rig crew is recruited to conduct a search and rescue effort when a nuclear submarine mysteriously sinks. One diver soon finds himself on a spectacular odyssey 25,000 feet below the ocean's surface where he confronts a mysterious force that has the power to change the world or destroy it.

Two hundred years after Lt. Ripley died, a group of scientists clone her, hoping to breed the ultimate weapon. But the new Ripley is full of surprises … as are the new aliens. Ripley must team with a band of smugglers to keep the creatures from reaching Earth.

Fifteen years ago, five men were abducted by aliens. Only four returned. Now, these same four men have managed to capture one of the creatures who killed their friend and ruined their lives.

A group of skeptical government officials headed by General Randolph are brought to a remote laboratory for a demonstration in "Psychic Materialization", a successful side effect of an experimental drug. But the project scientists had warned that not enough testing had been completed to access safety concerns. In a freak accident during the demonstration to the politicians, a vicious creature is created! Unable to contain the monster, it unleashes unbelievable havoc & destruction against mankind! Reproducing itself at an alarming rate, and all known weapons seemingly powerless against the creature, the scientists are gravely concerned for the survival of mankind!

A team of American scientists investigate the empty, destroyed base of their Norwegian counterparts in Antarctica, only to discover a terrifying life force that can take the form of its prey.

The six-member crew of the International Space Station is tasked with studying a sample from Mars that may be the first proof of extra-terrestrial life, which proves more intelligent than ever expected.

In 2176, a Martian police unit is sent to pick up a highly dangerous criminal at a remote mining post. Upon arrival, the cops find the post deserted and something far more dangerous than any criminal — the original inhabitants of Mars, hellbent on getting their planet back.

Detective Mark Corley storms his way onto an alien spaceship to rescue his estranged son. When the ship crashes in Southeast Asia, he forges an alliance with a band of survivors to take back the planet once and for all.

It is the year 2022. A mysterious systems failure causes the crew of a spaceship to be stranded on the dark side of the moon, while rapidly running out of fuel and oxygen. They are surprised to discover a NASA space shuttle floating in space, and board it in the hope of salvaging some supplies. One by one, the crew is possessed and killed, and it is up to Paxton Warner to find the links between the dark side of the moon, the Bermuda Triangle, and the Devil himself.

Crew members aboard a space ship encounter an alien life form intent on killing them.

A crew of scientists arrives on a far, cold planet to examine archaic artifacts of unknown origin. They discover that their German enemies already have a ship there. When they seek their help after a failed landing, they only find the Germans’ bodies, obviously slaughtered by one of the archaic creatures, awoken to new life. Now the alien is after them.

On its way back to Earth, the space shuttle Nautilus passes through a cloud of alien spores causing its sole occupant, astronaut Steve Thomas to transform into a blood-thirsty monster. The shuttle crashes into a swampy region of central Florida, creating a situation which threatens contagion and/or death to all who encounter the shuttle or its mutated pilot.

The crew of an experimental underwater nuclear base are forced to struggle for their lives when their explorations disturb a creature who threatens to destroy their base.

A space shuttle mission investigating Halley's Comet brings back a malevolent race of space vampires who transform most of London's population into zombies. The only survivor of the expedition and British authorities attempt to capture a mysterious but beautiful alien woman who appears responsible.

Four boyhood pals perform a heroic act and are changed by the powers they gain in return. Years later, on a hunting trip in the Maine woods, they're overtaken by a vicious blizzard that harbors an ominous presence. Challenged to stop an alien force, the friends must first prevent the slaughter of innocent civilians by a military vigilante ... and then overcome a threat to the bond that unites the four of them.

After landing on a mysterious planet, a team of astronauts begin to turn on each other, swayed by the uncertain influence of the planet and its strange inhabitants.

Bound for a remote planet on the far side of the galaxy, the crew of the colony ship 'Covenant' discovers what is thought to be an uncharted paradise, but is actually a dark, dangerous world—which has a sole inhabitant: the 'synthetic', David, survivor of the doomed Prometheus expedition.

Underwater deep-sea miners encounter a Soviet wreck and bring back a dangerous cargo to their base on the ocean floor with horrifying results. The crew of the mining base must fight to survive against a genetic mutation that hunts them down one by one.

During its return to the earth, commercial spaceship Nostromo intercepts a distress signal from a distant planet. When a three-member team of the crew discovers a chamber containing thousands of eggs on the planet, a creature inside one of the eggs attacks an explorer. The entire crew is unaware of the impending nightmare set to descend upon them when the alien parasite planted inside its unfortunate host is birthed.

When average, law-abiding citizens suddenly turn to a life of hedonistic behavior and violent crime, Detective Tom Beck is tasked with helping young FBI agent Lloyd Gallagher determine the cause.

Captain Saxon, an agent for the top secret Omega agency, has been given the assignment of tracking down and either capturing or killing the crew members of a secret space mission who returned to Earth against orders. It seems that they were all infected with an alien parasite, and they were trying to bring its eggs back to Earth. The eggs were lost in an accident, and both Saxon and the astronauts are trying to locate them.

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.

On a future earth where 98% of the surface is underwater, a Warlord who controls an army of sharks meets his match when he captures the daughter of a mysterious shark caller who must learn to marshal a supernatural ability if she is to free her people from the Warlord's dominion.

When some very creepy things start happening around school, the kids at Herrington High make the chilling discovery that their faculty is being controlled by body-snatching aliens.

Since the 1940's alien beings known as "GRAYS" have been sighted around the globe with the thought that they visit our planet to study our species and civilization before they eventually invade...but what if we're wrong? What if they are only here to protect us? After a meteorite crashes to earth awakening the extraterrestrial creature within, a young woman is abducted by an alien "GRAY" to aide in hunting down and destroying the creature before it can reach a second meteorite that fell to earth decades earlier unleashing its deadly infestation of earth.

The citizens of Comet Valley are being taken over by seeds from an alien plant that has taken root there. A sheriff investigates the strange goings-on.

Dr. Blake runs a TV show called "Independent Thinkers", which is sort of a Scientology-like self-help/religion program. But he's not making his audience think any more independently - with the help of an alien organism he calls The Brain, he's using brainwashing and mind control. The only thing that stands between them and world domination is a brilliant but troubled high school student with a penchant for pranks...

In this loose remake of "Forbidden World" (1982), Commander Krieger and his robot companion Tinpan are summoned by a distress call to a research facility on the planet Phaebon, and soon find themselves battling a bizarre virus and a monstrous creature inadvertently created by the scientists there.

In the midst of a tropical storm, the crew of an offshore oil rig must survive the rampage of a creature after invading its undersea habitat.

A group of scientists are possessed by an alien force when they investigate a meteor shower in a rural field.

Wolfgang is traveling in outer space when a monster, which he sees as a beautiful woman, appears in his spaceship and makes love with him. Then the ship is forced to land on a planet which is a penal colony. Here he meets Miranda who falls in love with him. A group of prisoners uses him and his spaceship to fly away from the planet. But the monster which is by now inside Wolfgang arouses and only Miranda's love can save him.

A nuclear leak creates a mutant Slithis sea monster, which terrorizes the variety of pets, winos, and hippies who hang around Venice, California.

A spaceship containing specimens for an intergalactic zoo crashes on Earth near a small backwoods town. The specimens escape, and soon town folk start turning up mutilated.

A futuristic underwater sea-lab is having problems with a UFO that's parked between them and a nearby deep ocean trench. As they investigate, they attract the unwanted attention of a dangerous creature who puts the scientists and crew in danger.

A hot air balloon crew and a dog find themselves on an island with scantily-clad part-alien women, zombies, and other monsters.

Group of heroin smugglers finds shelter on abandoned oil rig after their ship had exploded. Soon they find that the oil rig was just cover for biological experiment. One of the results is Charlie - shape-shifting monster with ability to absorb the memory of its victims. However, even such creatures have their own bad habits.

A team of scientists go to a nuclear mining facility to investigate a possible meltdown and instead find a large amount of cloned dinosaurs.

Space miners sent to stop a moon's collision course with the earth discover a hibernating creature that soon revives and starts slaughtering the mining crew.

A group of grad students have booked passage on the fishing trawler Harbinger to study the effects of global warming on a pod of Orcas in the Bering Sea. When the ship's crew dredges up a recently thawed piece of old Soviet space wreckage, things get downright deadly. It seems that the Russians experimented with tardigrades, tiny resilient animals able to withstand the extremes of space radiation. The creatures survived, but not without mutation. Now the crew is exposed to aggressively mutating organisms. And after being locked in ice for 3 decades, the creatures aren't about to give up the warmth of human companionship.

A giant asteroid is heading toward Earth so some astronauts disembark from a nearby space station to blow it up. The mission is successful, and they return to the station unknowingly bringing back a gooey green substance that mutates into one-eyed tentacled monsters that feed off electricity. Soon the station is crawling with them, and people are being zapped left and right!

In the Old West an outlaw named Sam Phoenix is about to be hanged. But just before the noose tightens, the town is besieged by a lethal alien invader with a laser-shooting stingray and a crazy Sarlacc mouth. The townsfolk scramble but get promptly smoked, save for a handful of survivors led by Phoenix.

Alien seeds hitch a ride to earth in a space shuttle crew and begin to grow. When their numbers reach the Threshold amount they will be an unstoppable swarm.

A treasure hunter finds a sunken Spanish galleon off the coast of a Philippine island. What he doesn't know is that the ship is guarded by the spirit of an ancient Moro princess

A young woman who's been alienated from her community finds herself in a face-off against a host of extraterrestrial beings who threaten her future while forcing her to deal with her past.

Three American astronauts who land on Mars discover the body of a frozen Russian cosmonaut and a mysterious talking orb.

A private jet crashes in the Sierra Mountains leaving seven survivors stranded in a torrential snow storm. With no rescue team in sight, the group decides to search for the plane in hopes of fixing the radio to call for help. But what they find instead is an alien creature that multiplies itself rapidly. The extraterrestrial beasts have a barbed-like tongue and are able to pull their victims into their razor sharp teeth to shred human flesh like a haywire garbage disposal. But the survivors won t go down without a fight!