I know that as in Dwarf Fortress, in reality blunt weapons were more efficient against armored targets. However, shouldn't a smaller contact area still give better penetration, so why are maces and warhammers ever better than an edged weapon of same weight?
War hammers are made like that.
They look like this, for reference, in case what you're thinking of is mauls (seeing as how common it is to do so in fiction and media). Many war hammers is practically on the verge of being piercing weapon, but all of them is made with a small contact area that can break through armour.
It was also rather common for maces to have sharp corners and flanges to easier pierce armour, or knobs/studs (I'm not good with the terminology) to give them a smaller contact area, backed up by the blunt force of the head. And then there's always
these. Same concept, but with spikes instead of knobs.
On the subject, one of my biggest disappointments with games is that they almost never (almost because M&B, the only game I've played that has them) have real war hammers. Which is sad, because I think they're awesome. Instead they have those stupid maul-likes (mallets, I call them
) that really is a kind of mace. Even more aggravating because such weapons - mauls and mallets - were basically only used as weapons by people who used them as tools to begin with (archers, for example).
BIG pet peeve. Very rant-inducing.