I will have to look at the Showdown system. From this and other game reports I've seen, I think it could work well for some more character-driven Atlantean scenarions I'm working on.
Yep, that's how I'm using them. Drake and Garret are only unit leaders in the Gaslight games but in Showdown they get a bit more interesting, even though they aren't characters. One thing to point out, in Showdown you do roll to hit and then roll to 'wound', which I know some people dislike in wargames.
Essentially it breaks down as follows:
You roll assorted dice types from D4 to D12, the higher your skill/stat at something the higher the dice type you roll. (Dice 'ace', so if you roll the top number you can roll again and add the amount.)
Ranged -
Roll your 'Shooting' die and roll a 4+ to hit. (Medium range is rolled at -2, Long range -4, cover gives a -2 etc). If you roll at least 4 higher than the needed number then you hit with a 'raise'.
Then roll your damage dice (a winchester does 2d8 damage) plus an extra d6 if you got a 'raise' on your hit roll.
Compare the total damage rolled against the 'toughness' of the target (armour affects the toughness, so no 'save' rolls), if you roll equal to or over then the target becomes 'shaken' (they roll to recover from shaken on their activation, if they are 'shaken' again by another attack then they are wounded), if your roll 4 points over then you wound them (characters have 3 wounds, normal troops only have the one.) Figures which lose all their wounds are killed.
Melee-
Same as Ranged, except you use the 'Fighting' skill and the target number to hit is the targets 'Parry' (usually harder to hit in melee than ranged but not always).
Damage is your Strength stat plus the weapons damage dice. (For example, a club does d4 damage, and an average strength guy is d6, so he'd roll d6+d4 in combat, plus an extra d6 if he got a raise to hit.)
Once you've done it a couple of times it's very fast.