Hill dwarves are extremely robust but poor at using magic. They are excellent at melee combat, especially with axes or bludgeoning weapons, and are good at using armour and shields, but are poor at missile combat or at using polearms (which are usually too big for them to wield comfortably). The only forms of magic which they can use with even a minimal degree of aptitude are earth, fire, and conjurations. They advance in levels at a similar rate to common elves.
The lower the value, the better the aptitude.
|Maces & Flails||70||Shields||70||Necromancy||160|
|Polearms||110||Traps & Doors||100||Translocations||150|
Hill dwarves were removed in 0.3 due to their similarity to mountain dwarves. Their aptitudes were nearly identical. MD were slightly better at magic, while HD were slightly better at melee, but the difference was quite marginal: never more than +/-20 in the old aptitude system, and always less than a difference of +/-1 in the new system. When HD were removed, some of MD's aptitudes (notably Axes and M&F) were changed to compensate.
One notable difference between the species was that, back when "non-recommended" race/class combos were actually forbidden, HD could be berserkers while MD could not.