Only five missions ? Too short ..
This game is based on the TV series CSI: Crime Scene Investigation. It puts you in Las Vegas to solve the crimes. In main menu you can choose training level to learn how to solve crimes, investigate crime scene etc. What I notice is that there is no Options in main menu so if you want to change anything regarding to video or audio or some other settings, you must start the game and then open options menu (for me it's strange :)). There is one more interesting thing in gameplay settings, you can not choose easy, medium or hard level, but you can checked some fields that are helping you when you resolve crime. Such as, when you find some evidence the proper tool automatically shows up etc.
There are five missions or crimes to solve. Every mission starts at the crime scene. When you done with the crime scene you go to your crime lab to investigate evidence. In the left corner of the screen you will find your PDA. From that you can choose wherever you want to go. In pda you will find four fields: evidence, locations, case file and options menu. Yeah I forgot about the hints, for every crime mission you will get other partner and if you stuck with the mission you can ask him for a hint. In the location field you will find two types of locations; one is crime lab, morgue places linked with police, and the other ones are crime scene locations regarding to the case. In the upper left corner of every location regarding to the case is the circle which means you didn't find all evidence. It is the case with the evidence. When you resolve the crime you must go to be evaluated. If asked for many hints you will get poor evaluation.
For graphic and sound I must say that developers are in a good path. Characters are realistic and locations of the crime scenes are very good. About the sound .. it's very simple .. realistic characters talk like in the series and that's it.
Conclusion is that if you like this type of games you should play this one. But wait a bit, don't buy it yet for only five missions.