Erebos: It's a game. It watches you.

Sixteen-year-old Nick Dunmore's classmates have a secret. When he receives a package with a mysterious computer game called Erebos, he hopes it will explain their strange behavior. He's quickly drawn into the cryptic world of the game, where players must obey a strict code. Erebos watches its players and begins to manipulate their lives in frightening ways. It soon becomes clear the game has a deadly agenda. When Nick sets out on a dangerous mission, reality and the virtual world begin to blur...