You usually play as a private investigator or a disgraced detective tasked with solving cases that the police refuse to touch.
Look at the description page on itch.io or Steam. Indie developers usually provide a "Developer's Log" explaining the narrative goals for version 0.1. DirtyCases-0.1-mac.zip
These cases often involve grizzly crime scenes, moral dilemmas, or disturbing psychological twists. You usually play as a private investigator or