Widely hailed as one of the best chapters in its 45-year sci-fi horror saga, Alien: Romulus topped $314 million worldwide this weekend as already the second-biggest film of the seven-film franchise.

Much like a Xenomorph bursting through your chest, Alien first surprised audiences more than 45 years ago, and it hasn't stopped growing since. With nine films (including the two Predator crossovers), ...