A real-time strategy game where you design airships and then fight with them. The aim is to have pretty chaotic explodey fights and interesting ship design choices.
The HMS Torturer is a "motile fortress" design. Upon entering combat, the ship is grounded, and acts as essentially a building, which makes it very tough - as long as it's not outmanoeuvred. Internet multiplayer is coming to Airships soon, which is where we'll see which designs really make the cut!