For those looking to achieve a "Perfect" run or collect all trophies:
The series consists of several standalone mysteries that can be purchased individually or as a bundle like the one on GOG.com : File: Murder.Is.Game.Over.zip ...
Interviewing suspects, searching for hidden clues with Cleo, and piecing together alibis. Playtime: Approximately 2 hours per installment. For those looking to achieve a "Perfect" run