Don’t expect a straightforward timeline, because continuity is a mess with the Alien and Predator timelines (even if, as in this list, you choose to ignore tie-in comics, novels, and games). Predator: ...

One of the very first narrative films, Georges Méliès's "A Trip to the Moon," is about aliens. Sure, everyone remembers that shot of a rocket ship crashing into the eye of the man in the moon, but as ...