1. K-PAX
Prot is a patient at a mental hospital who claims to be from a far away planet. His psychiatrist tries to help him, only to begin to doubt his own explanations.
It has an average vote of 7.2 on TMDB.
2. Predator 2
A police chief in the war-torn streets of Los Angeles discovers that an extraterrestrial creature is hunting down residents - and that he is the next target.
It has an average vote of 6.3 on TMDB.
3. Star Trek: Insurrection
When an alien race and factions within Starfleet attempt to take over a planet that has "regenerative" properties, it falls upon Captain Picard and the crew of the Enterprise to defend the planet's people as well as the very ideals upon which the Federation itself was founded.
It has an average vote of 6.43 on TMDB.
4. Herd
A short film about a lonely man and his new-found alien friend.
It has an average vote of 6.5 on TMDB.
5. Something Blue
A lonely wedding photographer falls for a wedding crasher, who disappears under untold circumstances.
6. Doctor Who: Deep Breath
The newly-regenerated Doctor arrives in Victorian London, and Clara Oswald struggles to embrace the man he has become. All the while, they reunite with the Paternoster Gang to investigate a series of combustions that have been occurring all around the city.
It has an average vote of 7.7 on TMDB.
7. Kids vs. Aliens
All Gary wants is to make awesome home movies with his best buds. All his older sister Samantha wants is to hang with the cool kids. When their parents head out of town one Halloween weekend, an all-time rager of a teen house party turns to terror when aliens attack, forcing the siblings to band together to survive the night.
It has an average vote of 5.4 on TMDB.
8. Alien
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.
It has an average vote of 8.2 on TMDB.
9. AVP: Alien vs. Predator
When scientists discover something near Antarctica that appears to be a buried Pyramid, they send a research team out to investigate. Little do they know that they are about to step into a hunting ground where Aliens are grown as sport for the Predator race.
It has an average vote of 5.911 on TMDB.
10. Gdleen (ガデュリン)
Due to a spacecraft malfunction, saleryman Ryu and his robot companion "MOS-01" crash land on the space ship/planet Gdleen. Ryu meets a cute Euredonian fairy called Fana and the two are soon entangled in a long standing war between the monsterous Babaress and the spell casting Miyorl tribes.
It has an average vote of 3.5 on TMDB.
11. Cencoroll Connect (センコロール コネクト)
Student Yuki has never seen one of the giant monsters she always hears about on the news and that threaten her city. But when she meets the lethargic Tetsu one day, things change suddenly. Because Tetsu moves around the houses with a creature called Cencoroll, which he can control with mind control and which can transform into a wide variety of objects. But not only Yuki is fascinated by Cencoroll: the boy Shu tries to take Cencoroll from Tetsu with the help of his own telepathy monster, whereupon the four engage in a bitter fight, in which Yuki also intervenes and the entire city is converted into a battle arena.
It has an average vote of 6.9 on TMDB.
12. The Cloverfield Paradox
Orbiting above a planet on the brink of war, scientists test a device to solve an energy crisis and end up face-to-face with a dark alternate reality.
It has an average vote of 5.604 on TMDB.
13. Fade to Black
In this meditation on contemporary race relations, two black men discuss in voiceover certain “casual” events in life and cinema that are unnoticed or discounted by whites—gestures, hesitations, stares, off-the-cuff remarks, jokes—details of an ideology of repressed racism.
14. Cropped
'Cropped' tells the story of a group of UFO enthusiasts on the hunt for proof of extraterrestrial existence at the site of one of rural Britain's mysterious crop circles. As events unfold and night falls, the group are forced to set their differences aside when the mystery of the crop circles is revealed.
It has an average vote of 5 on TMDB.
15. War of the Worlds
Ray Ferrier is a divorced dockworker and less-than-perfect father. Soon after his ex-wife and her new husband drop off his teenage son and young daughter for a rare weekend visit, a strange and powerful lightning storm touches down.
It has an average vote of 6.509 on TMDB.
16. Mars Attacks!
A fleet of Martian spacecraft surrounds the world's major cities and all of humanity waits to see if the extraterrestrial visitors have, as they claim, "come in peace." U.S. President James Dale receives assurance from science professor Donald Kessler that the Martians' mission is a friendly one. But when a peaceful exchange ends in the total annihilation of the U.S. Congress, military men call for a full-scale nuclear retaliation.
It has an average vote of 6.406 on TMDB.
17. Predator
A team of elite commandos on a secret mission in a Central American jungle come to find themselves hunted by an extraterrestrial warrior.
It has an average vote of 7.5 on TMDB.
18. A.I. Artificial Intelligence
David, a robotic boy—the first of his kind programmed to love—is adopted as a test case by a Cybertronics employee and his wife. Though he gradually becomes their child, a series of unexpected circumstances make this life impossible for David.
It has an average vote of 7.044 on TMDB.
19. Aliens
Ripley, the sole survivor of the Nostromo's deadly encounter with the monstrous Alien, returns to Earth after drifting through space in hypersleep for 57 years. Although her story is initially met with skepticism, she agrees to accompany a team of Colonial Marines back to LV-426.
It has an average vote of 7.9 on TMDB.
20. Contact
A radio astronomer receives the first extraterrestrial radio signal ever picked up on Earth. As the world powers scramble to decipher the message and decide upon a course of action, she must make some difficult decisions between her beliefs, the truth, and reality.
It has an average vote of 7.4 on TMDB.