Humm, looks interesting.
Not sure how to RP a lethal game with no stats, tho...
Here's my basic ideas. Totally written freehand!
Dwarmins Merciless Combat System
1. Determine who attacks first. This is logical, by GM decision-if you open a door and a man has a shotgun drawn, he's going to get you first. Some entities will be much faster than mere human reflexes, and at certain ranges will always strike first. If the situation is in doubt it's considered opposed, however, both players roll a d100 dice, adding their possible bonuses or maluses. Who or whatever rolls the higher number attacks first.
2. The attacker rolls a D100+"Offense Rating". This is a combined attribute, both the accuracy and lethality of the attacker, as well as his position, if advantageous. Sometimes, the roll can be ignored, if an attack could not be conceivably dodged-such as a shotgun fired into an elevator.
3. The defender deducts his "Defense Rating" from the attackers final roll. If the final number is below 50, the attack fails. Otherwise, it is a success. Defense rating is a combination of how effective your armor is against an attack, your position defending from, and if your weapon is capable of defending from it in the case of melee weapons.
4. A successful attack is rolled with a 1d10 and a 1D5. The first number stands for shock sustained, the second for actual lethality of the attack. These numbers are multiplied, and equal damage and such sustained-explained below. Weapons may have additional shock and lethality multipliers, reduced by the defenders armoring.
5. The defender, if still alive, counters.
Damage
Being hurt in DMCS is judged on two levels.
Shock Damage and Lethal Damage, against a characters health, represented by stats called "Life Force" and "Luck"-an ordinary human has 25 LIFE and 50 LUCK. Once you hit -1 LIFE, you die.
When an attack connects, it is either primarily shock, primarily lethal, or a combination of the two. When the damage dice is rolled, whichever is higher of the two numbers-shock or lethal-determines what sort of damage it is. A tied number split the rolled damage is considered lethal.
Shock is temporary-the barely dodged bullet, the claw that swipes inches from your face. Shock damage lowers all your D100 rolls by that same amount, but it usually heals very quickly outside of combat, assuming you can rest and recover your wits. Shock damage is reduced from your LUCK score-once you have no more LUCK, all further damage is lethal.
Lethal damage is just that. Bleeding wounds, broken bones, screaming pain. It is reduced from your LIFE score. Lethal damage lowers all your d100 rolls by 4x the amount you've taken. You can only gain a small amount of LP back in combat, compared to LUCK-it requires actual medical attention. [TBD?]
And, the Gm can keep ALL the stats, and rolls secret if he wants.