No it's multiplayer. In fact, we can have our own AltTabMe Crew there if you wanted. We just have to all end up on the same server. You can fight in blockades to take ownership of islands if you get really good. I have enjoyed it for years... it is simple, yet entertaining.[DOUBLEPOST=1363128798,1363128384][/DOUBLEPOST]The other thing I failed to mention are the individual puzzles power the ships. So for sailing/rigging, you have a puzzle, for bilging another, there is carpentry (tetris style), etc. They also have a pretty cool economy where you can own shops or work at them, like a distillery, ironmonger, shipyard, apothecary or tailor. I love going on pillages where they hunt brigand kings... those are really challenging battles, but you get sweet loot and trophies for completing it.
I have characters on all the oceans, but I primarily play on Emerald (I think). If you create a char there let me know.