After few times and when I'm prototyping some games decide to make this game.
So, the game be HFPS - Hardcore First persion shooter, why?
Player in games today are virtual character control, in Agent_ player is literally agent. mirror in every game be if something is only show YOUR face.
Agent have simple mission: find and destroy. Nothing else no optional mission. No Objectives - you must know what next and where to find it.
Of course like an agent to work you must have some special technology to research things and analyse clues.
This game play is high recommended have notepad and pen or something like that.
At last, testing two old videos from my youtube channel: