Arranged by date released
The Alien film series is a science fiction horror film franchise, focusing on Lieutenant Ellen Ripley (played by Sigourney Weaver) and her battle with an extraterrestrial lifeform. Produced by 20th Century Fox, the series started with the 1979 film Alien, which led to three sequels, books, comics and video game spinoffs.
The Predator film series is a science fiction horror film franchise, focusing on a human superior (who changes in each film) and their battle with an extraterrestrial lifeform, the Predator, as it gradually picks off his allies. Produced by 20th Century Fox, the series started in 1987 with the film Predator, which led to a sequel and novel, comic book and video game spinoffs.
Alien and Predator timeline
Check out Escafeld's list of the
Aliens & Predator Novel Series
I have done a list of the spin-off novelisations. Check it out ..
The Aliens & Predator Novel Series
Although its a 'Batman' short, is it a candidate for this list?
Make sure you check out my Character Profile lists for Aliens and Predator too!
The Science Fiction Multi Media List
http://www.listal.com/movie/alien-2-on-earth