For ArmA: Armed Assault (also known as ArmA 1), the Proper Mod Team produced a comprehensive collection of melioration attempts designed to enhance nearly every gameplay element. These "Proper Mods" focus on realism and immersion, covering areas from environmental details to core gameplay mechanics. Essential Proper Mods & Realism Add-ons
No, if you:
Vanilla Arma has a "magic first-aid" system. Realism mods change that. Arma Armed Assault Mods
moddb.com/games/arma-armed-assault/addons)