Alien: Romulus looks to be a terrifying love letter to the first film in the series, released back in the late ‘70s. But that sci-fi horror classic is not the only thing Romulus is drawing from, so as you watch the movie later this week, keep an eye open for the emergency phones first seen decades later in Alien: Isolation. And then be prepared for a scare.

Alien: Romulus, out later this week in theaters around the country, is primarily pulling inspiration from the original film by Ridley Scott. It ignores a lot of the wider universe that was developed in later movies and is focused mostly on a small crew dealing with a deadly, hard-to-kill alien that is hunting them down. However, as revealed in a new interview, the director behind the upcoming sci-fi horror flick also revealed that the fan-favorite video game Alien: Isolation, released in 2014, also inspired Romulus, possibly leading to its entire creation.

In an interview with Inside Total Film podcast , Romulus director Fede Alvarez explained that the horror game convinced him that the Xenomorph could be scary again after multiple sequels and cameos in other games, movies, and comics. “ Alien: Isolation was kind of what made me see that Alien could truly be terrifying and done well [today],” said Alvarez, as reported by GamesRadar. “I played it a few years after it came out.

Don’t Breathe was coming out. Or was I waiting for Don’t Breathe to come out, and I was playing the game. That’s why, at the time, I wa.