Hard Evidence is the fifth game in the CSI: Crime Scene Investigation series, but the first time released simultaneously for the PC and Xbox 360.
As in previous games, there are 5 cases to be solved with Gil Grissom, Catherine Willows and the other Las Vegas crime lab squad members. Questioning suspects and witnesses, collecting evidence and piecing together the puzzle of the cases are all part of the gameplay.
Additional forensic and investigation tools have been added including a large impound area where vehicles and boats can be searched for evidence. Players will also find more interaction with the lab equipment as well as improved in-game hints.