"Fire the cannons, sink ships and kill pirates with swords and muskets in Blackwake, a multiplayer FPS for PC and Mac" It is a kickstarter game, it is funded... honestly looks pretty cool. https://www.kickstarter.com/projects/2000479544/blackwake-reboot Arghh Matey~
Another video showing a full round. This game looks so cool, once the ships got close it starts to get super intense~