That's a little bit crazy idea we came up with my friend once when creating our own rpg system. He asked me what statistics should player use while making a shooting test and we started talking about it. STR to hold a gun in your hand, PE to aim, END to not be knocked by the recoil, CHA to not be feared during the gunfight, INT to create an invisible bullet trajectory including gravitation, wind etc, AGI to shoot during movement and in the right moment, LUK to shoot some vital points. Yeah it looks crazy but that's how real life works. Sort of. Kind of.
Anyway!
CHA should be charisma and will power combined during the fear system tests. Whenever there is a big gun and not only gun fight and you are standing lets say naked with a gun in your hand you can feel a little bit 'dead'. That means you don't stay there and shoot like a ghoul crazy but you run. During each turn a test should be made and if you or anyone else fails that test the game makes him run away towards the closest exit grid. Harsh but cool and real. Players are usually too hardcore to roleplay and they just shoot till the last blood drop and then curse their enemies while laying dead, why? Because they know they will resurrect and dont care about their lifes. This has to end here.
There can be some perks etc + high charisma morale system someone else mentioned some time ago.
