Spermula (1976)

A race of space vampires arrives in London and infects the populace, commencing an apocalyptic descent into chaos.

In the town of Dillford, humans, vampires and zombies were all living in peace - until the alien apocalypse arrived. Now three teenagers-one human, one vampire, and one zombie-have to team up to figure out how to get rid of the visitors.

When a group of naive teens working at a movie theater in a small Christian town discover a mysterious film hidden in its basement, they unleash an alluring succubus who gives them a sex education…written in blood.

16-year-old Cassie Sullivan tries to survive in a world devastated by the waves of an alien invasion that has already decimated the population and knocked mankind back to the Stone Age.

Years into a benevolent alien occupation, mankind is still adjusting to its new overlords. Their technology initially held promise for global prosperity, but rendered most human jobs – and steady income – obsolete. When two teenagers discover the aliens are fascinated with human love and will pay for access to it, they decide to livestream their romance to make extra cash for their families.

When their plans for a nature trip go awry, Polly and boyfriend Seth decide to check into a motel. On their way, they're carjacked and kidnapped by low-rent crooks Dennis and Lacey, who take the victims and their SUV to a nearby gas station. Along the way, they encounter an increasingly terrifying horde of parasites, and if any of them intend to survive, they'll have to outsmart the deadly organisms.

When some very creepy things start happening around school, the kids at Herrington High make the chilling discovery that confirms their worst suspicions: their teachers really are from another planet!

With the future of the human race at stake, a group of young men and women -- bred for intelligence and obedience -- embark on an expedition to colonize a distant planet. When they uncover disturbing secrets about the mission, they defy their training and begin to explore their most primitive natures. As life on the ship descends into chaos, they soon become consumed by fear, lust and an insatiable hunger for power.

A parasitic alien soul is injected into the body of Melanie Stryder. Instead of carrying out her race's mission of taking over the Earth, "Wanda" (as she comes to be called) forms a bond with her host and sets out to aid other free humans.

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.