龙与地下城暴击的定义：
A hit that strikes a vital area and therefore deals double damage or more. To score a critical hit (crit), an attacker must first score a threat (usually a natural 20 on an attack roll) and then succeed on a critical roll (just like another attack roll). Critical hit damage is usually double damage, which means rolling damage twice, just as if the attacker had actually hit the defender two times. (Any extra damage dice, such as from a rogue's sneak attack, are not rolled multiple times, but are added to the total at the end of the calculation.)
所以理论上，是的，暴击指的是击中关键部位。但是从游戏机制上只代表你需要掷出20，通过检定之后打出双倍伤害。
真正要做到“模拟”，你需要从游戏机制上设计出不同身体部位被击中之后人物的不同行为，比如眼睛被打中感知下降，脑袋打中直接ko，手被打中武器落地/不能使用双手武器，脚被打中行动下降或一瘸一拐，鸡鸡被打中直接开骂，诸如此类。在辐射2/铁血联盟2/刀剑封魔录里面曾实现过的那样。当然我举的都是2d游戏的例子。3d同理。