The Fallout games are known for their abundance of easter eggs, many of which are references to famed horror and sci-fi titles from over the years. And it’s turning out that the newly released Fallout 4 is no different!

Imgur user 1Times has found a strange item called the “Flux Sensor” that, after some investigatory sleuthing, turns out to be a reference to Ridley Scott’s 1979 sci-fi/horror masterpiece Alien! The item has a serial number that corresponds to the USCSS Nostromo, the ship where the majority of the original film’s events took place.

Below is a gallery that goes over all the information, including where to find the piece for yourself.