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: ...

The Alien franchise has been a cornerstone of the sci-fi genre since Ridley Scott unleashed the xenomorph on the world in 1979. Now, as the decades have passed, the franchise has had highs and lows ...