This recent trailer for the cerebral sci-fi shooter Prey -- out on PS4, Xbox One, and PC on May 5 -- does a great job of setting the game's tone. It's spooky, frightening, and disorientating. But it also poses many unanswered questions: Who are these aliens? Where is all this taking place? And what's with that device your character's injecting into their eyeball? That's where this "fannotated" version of the trailer comes in. Watch it now to understand the secrets hidden in the Prey trailer.