This is an adventure game in which players attempt to solve a series of unsolved serial killings and stop a possible copycat killer in the present day. Players interview suspects via text-based dialogue and investigate crime scenes, a combination of 2D and 3D images. The game often displays two scenes side-by-side (one from the past, one from the present), as players search for clues and examine the differences between the two images. Once the differences are found, a "Past Vision" is triggered, showing a grainy, greenish video of a violent crime: acts of shooting, strangulation, and hitting with a blunt object; victims lying on the floor—the images depict blurred silhouettes, "night-vision" effects. A few crime scenes depict traces of blood on objects (e.g., wrenches, envelopes); a message on a bathroom wall appears to be written in blood. During the course of the investigation, players may encounter characters that hold or smoke cigarettes, drink from cans of beer; cigarette butts and beer cans can also be found at crime scenes.
