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: ...

First conceived in an era when horror movie sequels tended to be cash grabs squeezing whatever a studio could out of a franchise, the "Alien" saga has seen layers of world-building folded into each ...