... now with 35% more arrogance!

Tuesday, January 25, 2011

What To Do With Descending AC

I've said before that I prefer descending AC, starting at AC 9 for no armor and going down to AC 2 for plate and shield. So I won't go over that again. But I thought I'd toss out some ideas on what to do with descending AC numbers, besides determine chance to hit.

Movement: Ignoring shields and encumbrance, round the AC of armored characters to the nearest power of 3 and add 3 to get the base move.

Thief Limitations: If using Dex bonuses for thief skills, only allow the bonus if Dex <= AC x 2.

Combat Evasion: Compare the lower of AC, Dex, or movement rate to the opponent's AC, Dex, or movement rate; the side with the higher score can withdraw out of reach before the other side can strike.

Cutting Wounds: If you are using 1d6 damage rolls and want to treat cuts as different from bruises (requiring 1 turn to bandage,) add opponent's AC to your damage roll; on a 10 or more, the opponent was cut instead of bruised.

Stunning Blows: On the other hand, unarmed attacks can be treated as being less likely to do real damage. Add opponent's AC to damage roll; damage (1-6) is real on a 10 or more, but on a 9 or less, it's treated as subduing damage.


  1. some interesting ideas.
    I've been giving negative AC scores the score as damage reduction. Magic weapons don't face this for a negative Ac of their equivalent value.

  2. Some rules I use in my Carcosa game (it's )D&D so AC is not effected by AC.)

    Stealth: Roll under AC + Dex Modifier + Misc Modifiers for stealthy actions(Originally stolen from Snorri on the OD&D boards)

    Swiftness: AC is added to D6 to determine initiative (Stolen from Sword Against the Outer Dark blog.)

  3. Here is something I use in my game. Initiative: 1d6 + DEX adjustment + base AC value for armor worn. The character with the highest initiative value acts first. This emulates the weight of the armor and how it affects a combatant. It is up to the GM to determine how magic armor affects this house rule. Shields are not calculated into this formula.