A Columbo type murder mystery RPG, plays like mass effect in a 70's open world, with a beat up middle aged detective as the hero. You converse, fight and progress in third person, levelling up skills etc. But you also commit all the murders in first person throughout the game as lengthy set pieces... so clue finding is secondary as they are revealed as you commit the crimes. Focus is on discussion, combat and exploration (just like mass effect). Along the way you would solve numerous crimes as side missions buying new trenchcoat armour and weapons with your pay.
You are effectively chasing your own tail, building up a rapport with the killer (that you also feel as you play as him) but never sure who it is till the endgame.