Dexter Morgan is a blood-spatter analyst working for the Miami Metro Police Department, but he leads a double life as a serial killer with his own code of only picking victims who are responsible for the death of others. Based on first season of the Showtime television series, you play as Dexter investigating crime scenes, uncovering evidence while protecting your own identity.
Michael C. Hall and some of the other cast provide voice work for their characters from the show. Dexter investigates several characters including a teacher whose choir boys are disappearing, the ice-cream truck killer who decapitates victims without any blood, and someone who is murdering women and uploading snuff videos on a website. These cases are variations of those on the television series. You can interrogate suspects using different dialogue options - aggressive, neutral or safe. More aggressive actions and dialogue will result in losing your Mask of civility and people treating you with suspicion. In some areas, you may have to use stealth to keep out of sight. The screen corners will be change from orange to red light if you are in danger of being seen. There are several mini-games throughout such as breaking into a computer, or recreating blood spatter patterns at crime scenes to find the weapon used and angle of attack. You will go through locations such as Dexter's apartment, the police department and crime scenes.