Best movies like Attack of the Unknown

A misguided scientist enables an alien from Venus named Zontar to come to earth in order to "help solve man's problems". However, as soon as Zontar arrives on Earth, it quickly becomes obvious that the three-eyed, bat-winged, skeletal black creature has a hidden agenda.

Two years after the Martian invasion, George Herbert's worst fears are realized: The Aliens have returned. As a second wave of Martian walkers lay waste to what's left of Earth, an alliance of military forces prepares a daring attack on the Red Planet itself. Once again, the future of mankind hangs in the balance.

On March 13th, 1997 one of the largest UFO sightings ever recorded took place across the southwestern United States...

A vacationing family encounters an alien threat in this pulse-pounding thriller based on the real-life Brown Mountain Lights phenomenon in North Carolina.

An astronaut doctor Ivan Hood and his fellow astronaut Kelly return from their mission in space to find the world has been taken over by aliens. Now Dr. Ivan Hood and Kelly must lead a revolution to free the human slaves from their alien masters.

Set in the year 2022, a group of convicts sentenced to life in prison are led on a mission into uncharted deep space by Commander Skyler (Williams) to salvage a lost ship. As incentive to go on this dangerous mission, the convicts are given the opportunity to spend their weekends in a virtual reality world where they could live out their sexual fantasies with any woman they choose. However, a woman who is not part of the program appears in it (Scoggins), kills each virtual woman and seduces each convict. When she begins to appear outside the program, the men quickly turn on each other.

When astronaut Spencer Armacost returns to Earth after a mission that nearly cost him his life, he decides to take a desk job in order to see his beautiful wife, Jillian, more often. Gradually, Jillian notices that Spencer's personality seems to have changed, but her concerns fade when she discovers that she's pregnant. As Jillian grows closer to becoming a mother, her suspicions about Spencer return. Why does it seem as if he's a different person?

When once distant UFOs become a terrifying threat attacking Earth, a Marine staff sergeant and his team take it upon themselves to face the enemy and protect what remains of the planet.

On the same day that Tom Dunn finds out that he is to become a father again, the people of Earth become plagued with terrifying visions of the end of the world. When a gigantic, all-consuming alien mothership launches a ruthless attack, chaos and destruction follow. The ultimate war for Planet Earth is about to begin...

Doctor Who and his companions are hurled into the future and make a horrifying discovery: the Daleks have conquered Earth! The metal fiends have devastated entire continents and turned the survivors into Robomen.

Seven years on from the events of Monsters, and the ‘Infected Zones’ have spread worldwide. Humans have been knocked off the top of the food chain, with disparate communities struggling for survival. American soldiers are being sent abroad to protect US interests from the Monsters, but the war is far from being won.

A documentary crew follows an elite unit of soldiers in the wake of an alien invasion.

A family living on a farm finds mysterious crop circles in their fields which suggests something more frightening to come.

A psychic father and daughter band together with an "angel" in an attempt to save Earth from an extraterrestrial Armageddon. This suspenseful thriller ties together strange occurrences from 1965 in the Bermuda Triangle (where an American fighter pilot supposedly encountered a spaceship) and government hush-up conspiracies.

Five friends set out to a cabin in the woods for a fun weekend getaway that is, until extraterrestrial visitors turn it into a fight for their lives. The group is pulled from their reverie when a flickering object crashes deep in the woods. As they investigate, the friends stumble across an alien spacecraft, and its inhabitants have not arrived in peace.

Charlie's ex-wife disappears, and he goes to where she grew up--a rural town in the midwest--to look for her. But, surprisingly, nobody knows about her or any of her many relatives, the Newmans. He meets aliens; but when he contacts the FBI, they don't believe him. He tells his story to a tabloid; and suddenly, he is chased by the aliens.

A group of space renegades hook up with a drifter named McQueen. Together they hole up in an abandoned research facility for the night and are relentlessly pursued by a human/monster hybrid.

In this remake of the classic 50s SF tale, a boy tries to stop an invasion of his town by aliens who take over the the minds of his parents, his least-liked schoolteacher and other townspeople. With the aid of the school nurse the boy enlists the aid of the U.S. Marines.

The Earth is invaded by alien parasites—AKA 'slugs'—that ride on people's backs and control their minds.

In a small Oregon town, mysterious crop circles have begun appearing in Joe's corn fields. When Joe's cousin, his five college friends and local Sheriff Willingham happen upon the otherworldly designs, they unleash unfathomable terror.

Aliens in human disguise commandeer a rural airport during a snowstorm. To survive, the people trapped inside must determine which of their own is not of this Earth.

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.

Captain Rameses and his Legion of the Winged Serpent brigade are out to claim Earth for their dying race. Out to save Earth is an alien guard patrol located in the Bermuda Triangle, the League of Races. LOR leaders warn Rameses that he's breaking galactic treaty rules. The alien villain responds by launching an invasion which telepathically drives Earthlings to suicide. The LOR implore UFO expert Professor Duncan to help them. Eventually, the two alien forces battle. Will the Earth be saved?

When police are puzzled by several horrific murders, they assume they have a serial killer on their hands. But soon they realise that the unimaginable has happened. A killing machine from another world has arrived on Earth determined to brutally execute human beings. Finding themselves out of their depth they are forced to rely on a mysterious alien hunter that has volunteered his help.

A couple on the brink of ending their marriage spend a weekend in different cities. After a cataclysmic event strikes, the husband embarks on a physical and emotional quest to return home as a nation prepares for the worst.

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

After someone is killed in the subterranean project called "Shadowzone," a NASA captain is called in to investigate. In the project, sleeping subjects are induced into a deep EDS state whereby they become portals to a parallel universe. Unfortunately this causes adverse reactions in the subject, and something gets through the portal, the consequence of which is an attrition problem.

Two cops investigating the murder of a young boy become invloved in a very secret project involving alien life. Needless to say, the authorities don't want them to stick their noses into this

Happily married couple Bob and Dez Wilson and their 12-year old son Andy are being attacked by a blinding light when driving home from a daytrip. They awaken a couple of hours later, seemingly unscathed but soon driven mad by recurring nightmares. It soon appears that they have been abducted by aliens as proved by their sons handycam that had suddenly started running right after the incident. This mysterious fact is discovered by even more mysterious Men In Black who start nagging the family up to the point of threatening to kill them. Laughed at by the police the threesome seek refuge at sf-writer Stan Mills' house and start fighting back.

A group of aliens arrive on Earth as part of an advance invasion force. Their mission is to kidnap a small sample of humans and run them through a series of rigorous tests to determine if they would make suitable slaves. Harper, one of the alien experimenters, has become frustrated with her planet's endless cycle of conquest and extermination and begins to feel some sympathy for her human captives. While the prisoners see a glimmer of hope in the compassionate alien, will it be any use in stopping the enormous attack fleet just a few days from Earth?

Earth's position in the universe has become of vital strategic importance to those who have, until now, only studied us from the far reaches of space. Knowing our weaknesses, they have planned their attack, and now, in just 5 days, life on Earth will change forever. Robert Casey, a retired US Intelligence agent turned UFO investigator, races to discover the truth about the Dominion and what it has in store for the human race. Time is running out...

In the near future the earth has become desolate and dangerous. Now inhabited by by a mysterious race of creatures, humanity has been forced to find refuge in the SkyArk, a man-made city in the sky. As the population grows, space becomes scarce and only the rich and powerful can stay, dumping the poor and orphaned of SkyArk to the abandoned earth.

After an alien spacecraft destroys Washington, D.C., the residents of a small town must fight off a unit of alien soldiers on the hunt for the President of the United States and the mysterious device he's carrying after his escape chopper crash lands nearby.

A crack test pilot lands to find the planet has been devastated by unknown forces. There are a few survivors, so he organizes them in a plan to ward off control by a group of killer robots.

Sibling astronomers join forces with the military when hostile aliens attack Earth.

When Earth is attacked by a hostile alien force, a small town firefighter and a rogue SETI scientist team up to activate the only technology capable of defeating the invaders.

It's the end of yet another night at Hastings Supermarket, a grocery store in Buck Lake, Arizona. But just before closing, a group of masked and armed to the teeth militants invades the store and take everyone hostage

When drones arrive in a flash, slaughtering humanity and stripping the Earth of its resources, a small team of scientists hiding in Los Angeles works to expel the drone menace once and for all.

A local artist uses the wreckage of a crashed Russian satellite in his giant sculpture for the town's centennial celebration. But soon a mysterious alien substance brings the giant sculpture to life; creating an iron monster whose only instinct is to survive at any cost.

After the American Army shot down a UFO in 1947, generations of elite commandos were secretly trained to deal with the aliens' feared return. However, the extra-terrestrials never came back and the elite force was disbanded. Sixty-six years after the Roswell crash, the aliens are invading Earth and only the over-the-hill retired commandos can stop them.

Earth as we know it is gone. A virus has destroyed the planet and rendered all its women infertile, all but one. An elite team of soldiers are tasked with bringing the woman to safety on the newly habitable Earth Two. But when they are forced underground they find themselves fighting for survival from an bloodthirsty creature in a maze of ever shrinking tunnels. As the team's ranks start to dwindle, the tunnels shrink and the ammunition run out, the crawl for survival becomes more and more desperate.

Disguised as executives from a Dutch Oil Company, Aliens from outer space buy a local farming company and promise to create jobs for the failing farming town. Their goal is to use crop circles to heat up the temperature of the earth and eventually turn the entire planet into a Club-Med for extra-terrestrials.

In the year 2044 AD, the human race has amped-up its space exploration and reached out to the stars through the miracle of ROBOTECHNOLOGY, but not without bringing intergalactic war upon the Earth itself. Heroes will die and allegiances will shift. But in the midst of combat, perhaps peace will spring up through the charred remains of battered history. One of the greatest science fiction sagas of all time continues...

Super criminals are planning to infiltrate Earth with mass nuclear destruction! Only Starman can defend civilization by thwarting evil!

In a small rural community, local police officers Zoe and Patrick begin their shift as normal but soon, strange events unfold. Residents begin behaving erratically, and suicidal panic spreads amongst the township they are trying to protect. Zoe and Patrick realise alien machines are taking hold, cutting their small group of survivors off from the outside world. Can the determined humans band together to save their community, and all mankind, from extinction?

For millennia the Alien force has watched and waited, a brooding menace that has now at last decided to take over the Earth. Communications systems worldwide are sent into chaos by a strange atmospheric interference, a massive spaceship heads towards Earth and smaller spaceships begin to cover entire cities. Suddenly, the wonder turns into horror as the spaceships destroy the cities with energy weapons. When the world counterattacks, the alien ships are invincible to military weapons. The survivors have to use their wits to kill the aliens, or die.

Two men witness an unexplainable event in the sky as a historic solar storm approaches, and they try to survive as a terrifying life form hunts them.

People from various walks of life find themselves held captive in a desolate area surrounding a secret government installation rumored to contain extraterrestrial life

Monsters from space attack earth, two scientists and a couple of teenagers try to stop the extraterrestrial invaders.