Detective Gman

Explore an open world city, enter every building, and interact with over a thousand characters. Build your character and level up your Detective skills in order to intimidate, seduce, and use jokes to get crucial information from people. Become stoic, charming, funny, and an expert in hand to hand combat and gun fights. Get in fist fights, shootouts, and protect the public from rival mafia gangs.

There aren't enough Detective games out there, but if there were, Detective Gman would be one of the very best.