As with the previous CSI games, there are five cases to work on. However, the game has taken a drastic graphical change, opting for a stylised 2D cartoon look, instead of the rendered 3D graphics of previous games in the CSI franchise. The game will allow you to control a CSI (Mac or Stella) and solve cases, collect evidence and solve puzzles. You will also be able to interrogate suspects, similar to the Law and Order videogames with branching dialogue options, and depending on your tone or line of questioning you may find the suspects refuse to co-operate, or tell you everything you need to know.
This is Legacy Interactive's first CSI game, with them previously having experience creating Law and Order video games for PC.
As of April 2009, UBISOFT, released the final case ("Derailed"). This case requires game patch 1.01 (it will be installed if PC has an active internet connection). Mac Taylor becomes the prime suspect on the case when his DNA is discovered all over the body of a dead man.
Case 1 - Downward Spiral
A man has fallen from the top of a building - was it homicide or was it suicide? Suspects include his boss, a tattoo parlour girl and a doctor who gave him surgery. You work with Mac on this case.
Case 2 - Just Desserts
An infamous food critic is found dead in a restaurant. Suspects include the general manager who had an affair with the victim, a chef who was criticised for a bad review from the victim and another chef who made him meet with a mobster. You work with Stella on this case.
Case 3 - Off The Mark
A woman is found dead in a theater used for magic and another at a construction site. Suspects include the two acts that were performing, a construction worker and an amusement park worker. Is this the work of a serial killer? You work with Danny in this case.
Case 4 - Hillridge Confidential
A young girl was killed during her live session on the Internet. The killer wanted to stop the threats going around the school and stop her from telling the killer's secret. Suspects include the doorman, brother and sister and the headmaster. You work with Lindsay,Angell,and Flack on this case.
Case 5 - Derailed
Mac works on a frozen body recovered in a metro station. Unfortunately for him, the clues brings him as a suspect, as the victim was a rapist Mac couldn't throw in jail many years ago. Suspects include a mother who wanted Mac to stay away from her daughter, the daughter who the victim attacked and a homeless man who lives in the subway You work with Hawkes on this case.