Ever since 1979, moviegoers have been terrified by the nameless xenomorph introduced in Alien. And the success of that movie ensured that this franchise expanded even quicker than a chestburster ...

Steven Spielberg is one of the greatest filmmakers of all time, and he has created some truly chilling alien encounters.

From Inception to Alien, here is the list of 5 highest-rated sci-fi adventure movies to watch after Project Hail Mary.