I realize this thread is 3yrs old, but have you played The Legend Of Pirates Online (TLOPO), it's Disney's original Pirates Of The Caribbean Online, resurrected .. look for tlopo dot com to find the game, make your pirate just like the original game .. it - is - the original game, on better servers with better graphics engines .. Jack and Will and Elizabeth and Gibbs, Barbosa, Davy Jones, even the monkey are in game.
TLOPO - can - be played Single player, but as usual, is better with a crew, either ship's crew, or a guild to help level up. There are a few of the more difficult island quests that really require a crew to keep you healed while you fight, but I played a lot single player, sailing, looting, even the larger Ship Of The Line, top class boats .. even Queen Anne's Revenge can be sunk single player with a war sloop.