Probably this is a moot question, because how can you really know until you play the prototype, right? I've played shooting games since Wolfenstein and one thing that is consistent across almost all of them is this: with a bit of practice, you can usually get good enough to simply "outgun" the enemy AI. That is, you become confident enough in your ability to react faster and shoot more accurately than them that in order for the game to become more challenging there has to be a ton of enemies, or they soak up more damage, etc. So my idea is to make a game in which your crosshairs have a realistic amount of bob to them (i.e. a lot unless you are prone), and also the crosshair will never be locked to the center of the screen. Kind of like how some games allow you a certain amount of deadzone. But in this case, the crosshair, which only becomes visible when entering aim mode, is constantly moving around within that deadzone radius, so that when you do snap to aiming mode, you will never know exactly where the crosshair will be. (obviously it is still somewhat centered, but not perfectly enough for accurate snap shots.) So that will eliminate pre-aiming, especially in a third person shooter. Those two things alone I think could up the realism and difficulty factor quite a bit, because no matter how quick your reflexes are, when you enter aim mode you will have to adjust every time. You won't just know if you are on target by having the screen centered on the enemy. Furthermore, on top of those two things, I want a very small and not super visible crosshair. Aiming in real life is often not just a challenge of keeping steady, but also having poor visibility and being uncertain of your actual aimpoint. Obviously this is all for a certain niche of shooting games -- something I'd expect fans of Arma or Squad to enjoy. The question is, would it be too frustrating? My hope is that the lack of reliability in superior aiming skills will result in the player having to adapt and create other methods to defeat the enemy -- mainly by mastering ambush tactics. Anyway, I look forward to any thoughts on the matter.