The main character is World War I veteran John Lorne. In the story, he becomes the host of a strange parasite, after which abnormal events begin to happen to him.
During the course of the game, players fight various supernatural creatures and explore various locations. In addition, the character can use ancient artifacts that can give the hero new abilities.
The game has special mechanics that are responsible for the character's mind. In some situations, the hero may see hallucinations, which may cause him to have panic attacks.