In lore, the dwarves are purely fascinated with mechanical gadgets for their own sake, not usually concerned with the larger world's politics. But a swarm of evil dragons descending over the land kind of forces even the gadget-happy to take notice, since they'll probably trash the local Fantasie Beste Buyye.
The Steam Mechanicus carves his gameplay niche in the mid-range area, using a variety of projectile attacks, self-built turrets, and rocket-powered jumps to pull together a victory. This new class is exclusive to subscribers for two weeks, at which point it will lose its exclusivity but retain its overall fiddly qualities.
[Source: Bigpoint press release]