This Is the Zodiac Speaking is a
first-person game that puts players in control of the protagonist Robert Hartnell. Gameplay primarily revolves around the player finding clues by exploring the setting and interacting with various objects. The game is mainly set in two locations: Robert's house, where clues are collected, and Dr. Landau's office where Robert undergoes dream therapy that transports him subconsciously to a location that relates to one of the Zodiac's victims. Throughout the investigative phase, the player is stalked by the
Zodiac Killer, who roams freely around the location. To counter this the player must use stealth and avoid being in Zodiac's direct line of sight. If the player is caught they are taken back to their starting location. However, an option to remove Zodiac from the investigation sequences exists in the game's settings, allowing the player to explore the scene without hindrance. Once the investigation is completed, the player must find a
cipher somewhere in the scene to return to Landau's office. ==Synopsis==