Dwarf Fortress really, really needs gunpowder, primitive handguns and canons, as well as mining TNT á la Minecraft.
It'd be impressive, one of those undeniable signs of a wealthy fortress when you can greet the inevitable goblins and dragons and whatnot with a hailstorm of canon balls. With a random chance of exploding, of course...
Hell, imagine all the new types of fun it'd spawn. All together now: Urist McFisher cancels fishing in magma pool; interrupted by Fire Imp! Urist McFisher is on fire!
!!Urist McFisher!! is now rushing up into the fortress, setting stray kittens and a noble ablaze. !!Urist McFisher!!, trailing smoke behind him, thinks it'd be an excellent idea to rush in and look for water in the room containing the gunpowder stockpile...
Part of the mountain above suddenly vanish inside a mushroom cloud, and a large chunk of the fortress disappear in favour for a big ol' hole.
The pipelines leading magma to the fortress' secret lava weapon is of course knocked loose, and the hole is swiftly flooded with magma. Which then floods the rest of the fortress, now filled with burning, tantruming dwarves.
Of a population of 136, two fortress guards, one tamed elephant and a legendary soap maker makes it out alive. Fun!