1. ‘The Thing’ (1982)
Memorable quote: “Somebody in this camp ain’t what he appears to be. ”
Scare factor: What makes this the top fright fest? Could it be the fear of complete isolation in the face of disaster? Or the invisible enemy in sub-zero temperatures? How about the terrifying feeling of not knowing which of your supposed friends and colleagues are who they say they are, and not a shape-shifting alien? Yeah, all those things.