With their intention being to respond to an SOS call they recieved from an unknown moon, the crew of a commercial spaceship decides to search the mentioned moon for intelligent life; when they run into a completely different, bizarre form of being. The alien soon starts hunting and terminating the terrified crew, one man at a time.

Fifty seven years after Ellen Ripley survived her disastrous ordeal, her escape vessel is recovered after drifting across the galaxy as she slept in cryogenic stasis. Back on Earth, nobody believed her story about the "Aliens" on the moon LV-426. After the "Company" orders the colony on LV-426 to investigate, however, all communication with the colony is lost. The Company enlists Ripley to aid a team of tough, rugged space marines on a rescue mission to the now partially terraformed moon to find out if there are aliens or survivors. As the mission unfolds, Ripley will be forced to come to grips with her worst nightmare, but even as she does, she finds that the worst is yet to come.

Despite the efforts of Ripley and the space marines in the film Aliens, an embryonic alien infiltrates the starship. It accidentally triggers the ship's emergency systems, dropping the escape capsule to the surface of a nearby planet. Ripley finds herself in a prison colony peopled by a religious cult composed of former murderers and rapists. Meanwhile, the alien has managed to grow into a new and deadly form, and is picking off the weaponless prisoners. Ripley soon discovers, much to her horror, that the real danger is much more personal...

200 years after the conclusion of Alien 3, the Company is able to resurrect Ripley through the process of cloning and the scientists successfully take the Queen Alien out of her. But, Ripley's DNA gets mixed up with the Queen's and she begins to develop certain alien characteristics. The scientists begin breeding the aliens, but they later escape. Soon the Xeno-morphs are running amok on the ship, which is on course to Earth. The Queen then gives birth to a deadly new breed of alien, which could spell disaster for the entire human race. It's up to Ripley and a band of space pirates to stop the ship before it reaches Earth.

When a private satellite encounters an unidentified source of heat in Antarctica and it is found to be a pyramid buried deep underground , a search team comprising of top-of-the-line archaeologists and engineers is sent to Antarctica to find out more . Once there , the team comes across signs which indicate that the place is inhabited by an unknown alien species . It is not long before the aliens begin to hunt the team members . At the same time , a trio of coming-of-age Predators have arrived to collect the skulls of the aliens as trophies , and the humans are caught between a deadly battle between the two warring species .

Following the events of Alien vs. Predator, and the maturation of the chestburster that erupted from the body of Scar (the Predator that defeated the Alien Queen) into an adult Predalien, the Predator scout ship crashes in the woods of Gunnison County. A local, Buddy Benson, and his son, Sam, are hunting in the forest and witness the crash, but they are chased and are implanted with alien embryos by facehuggers along with several homeless people living in the sewers. Meanwhile another Predator lands seeking out the Alien and destroying evidence of their presence on Earth. The dwellers of the town find themselves in the middle of a battlefield between the two deadly extraterrestrial creatures, and the small group of survivors splits between the leadership of Sheriff Eddie Morales and the bad-boy Dallas Howard. Both have different opinions about the best means to escape from the beings.

This film is set in 2093 and takes place in the same universe as the 'Alien' movies. A group of explorers, including some archaeologists, are on an "undisclosed" mission. They arrive at a moon trillions of miles away from Earth. The team spot what they believe to be signs of civilization. They go to investigate and find more than just signs, they find conclusive evidence. But some of them have an ulterior motive for being there, including the Weyland Corporation. They believe that this is where the human race actually came from. Things soon turn from excitement to survival once inside their discovery.

Almost eleven years after the futile and disastrous expedition on the distant moon LV-223, the deep-space colonisation vessel Covenant equipped with more than 2,000 colonists in cryogenic hibernation, sets a course for the remote planet Origae-6 with the intention to build a new world. Instead, a rogue transmission will entice the crew to a nearby habitable small planet which resembles a lot like the Earth, nevertheless, sooner or later, the unsuspecting members of the Covenant will have to cope with invincible and unconquerable biological foes beyond human comprehension. Ultimately, what was intended as an exploratory and peaceful mission, under those circumstances, it will soon turn into a desperate rescue operation deep into the cold infinite space.