BlockShip Wars is a physics based, multiplayer, action-realtime strategy game where you command a fleet of space ships you design and build yourself out of blocks. In this game you will gather resources to build ships and outfit them with thrusters, weapons, shields, etc. As well you can build your ship to the shape you desire. The object of the game is to annihilate your enemy, and have fun in the process. BlockShip War
A very early screenshot of ship building.