Sometime ago I got an idea for making the D20 system more realistic, I posted it on the wizards website, but no one seemed interested.
The idea is very simple, this system employs both a Defense Score and an Armor Class, it also can replace the system used by T20.
The Defense score is determined from all those factors except the equipment bonus for armor.
The Armor Class is determined by adding the equipment bonus to the Defense score, this means that the Armor class is either equal to or greater than Defense.
You roll a D20 to hit; if your score is less than the opponent's defense you miss; if your score is greater than the opponent's armor class you roll for damage and you subtract it from the opponents Hit Points; however if the d20 roll comes in between the opponents Defense and AC scores, then the diffeence between your opponent's Armor Class and what you rolled becomes DR (Damage Resistance), you roll for damage subtract the DR and apply the remainder to your opponent's hit points.
Another aspect of this is why I call it Decimal D20. When you roll your d20 to hit and your opponents Defense is way up there, lets say 28 and your your a first level character with no bonuses to hit. You roll your d20 and if you get a 20 then you add a 1d10 roll to your score and if the result is 28 in this instance then you hit and you follow the rules in the above paragraph.
The idea is very simple, this system employs both a Defense Score and an Armor Class, it also can replace the system used by T20.
The Defense score is determined from all those factors except the equipment bonus for armor.
The Armor Class is determined by adding the equipment bonus to the Defense score, this means that the Armor class is either equal to or greater than Defense.
You roll a D20 to hit; if your score is less than the opponent's defense you miss; if your score is greater than the opponent's armor class you roll for damage and you subtract it from the opponents Hit Points; however if the d20 roll comes in between the opponents Defense and AC scores, then the diffeence between your opponent's Armor Class and what you rolled becomes DR (Damage Resistance), you roll for damage subtract the DR and apply the remainder to your opponent's hit points.
Another aspect of this is why I call it Decimal D20. When you roll your d20 to hit and your opponents Defense is way up there, lets say 28 and your your a first level character with no bonuses to hit. You roll your d20 and if you get a 20 then you add a 1d10 roll to your score and if the result is 28 in this instance then you hit and you follow the rules in the above paragraph.