You haven't played anything like this before, but maybe Talk to Me Human is a sneak peek into how NPCs in games will all be done soon

Talk to Me Human features AI NPCs who interact with you on the fly depending on your responses, testing your social skills through voice-to-text technology. It blurs the line between human and AI.

The game encourages 'normal' conversations with AI-driven characters, where your responses are judged by the AI based on the scenario. The experience is described as mind-blowing.

Read at ReadWrite