With “Alien,” a sci-fi shocker thick with atmosphere, Ridley Scott set a new benchmark for the genre – in 1979. Then came a spectacular sequel thanks to action expert James Cameron, who gave us “Aliens” in 1986. Four more “Alien” films followed, though none ever rivalled the first two. Now cinemas are set to show the seventh film, “Alien: Romulus,” with the action taking place between those first two cult films. Ridley Scott as producer After veteran director Ridley Scott directed “Prometheus” (2012) and “Alien: Covenant” (2017) – both of which tell the prequel story – he limited himself to pr…