i guess this forum isn't embedding correctly
https://www.youtube.com/watch?v=8DXBHbF0f0Q
Basics are you have Vikings vs Buccaneers flying hot air balloons with Rockets for added thrust, and Cannons. Your team crews the ships from a small Kamikaze, to a Battleship with 2 cannons on both sides. While on the ship you can fire the cannons, pilot the ship, spot, fire airmines, fire Flak guns as blockers, support the cannons (make the fire faster) fix the ship. Or if your close enough jump ship and try to board and capture an enemy ship.
Multiplayer FPS Co-op at it's finest. Would be a great game for a LAN party