The Xenomorph, from the *Alien* franchise, is arguably the most iconic and terrifying movie monster ever created. Its acid blood, terrifying double-mouthed maw, and wicked claws practically invented the space horror genre, giving generations a new nightmare to fear. With *Alien: Romulus* now streaming, you might be itching for a complete rewatch of the entire *Alien* saga, including the *Alien vs. Predator* crossovers (which, yes, are set on Earth). But what's the best viewing order? We've got you covered, with viewing options by both chronological order and release date.
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Chronologically, the Xenomorph saga begins with this crossover film. Set in 2004, *Alien vs. Predator*, directed by Paul W.S. Anderson, brings to life the "battle of the titans" concept first seen in a 1989 comic. Humans discover that Predators have been visiting Earth for millennia, utilizing ancient cults to breed Xenomorphs for their ultimate hunting challenge. The 2004 hunt, needless to say, goes awry.
*Alien vs. Predator* 20th Century Fox
PG-13
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