Probably the best (and only one) I've encountered is the Painscreek Killings - a little known gem that I've been pestering my friends to try out. The only syste

Probably the best (and only one) I've encountered is the Painscreek Killings - a little known gem that I've been pestering my friends to try out. The only system it uses is the old Unity style first-person "interact with item in environment to read note or pick up key" mechanic. However, the design is intricately laid out so that only by making a conclusion in your head, you know where next to go in the small, but sufficient open world town the game takes place in. I think more detective games would benefit by taking inspiration from that game.