Blackwake is a fun fast paced PvP Naval combat game in the age of sail. The game had a successful kickstarter and has been developed by a two man team(One dev is an Aussie!). Blackwake recently released on steam, check out this link.
Never one to miss an opportunity to make inappropriate naval/pirate jokes we have brought up a Day0 Blackwake server for Australian and New Zealand salty sailors. We have had a few sessions and the game play has been both hilarious but requires teamwork and good comms to be victorious.
Any issues, suggestions or general discussions please go the the dayo forums here.