Any Island Empty!
 

I just found this one on accident while doing a flagship battle with my war galleon.

:130: What you do is get a crew.
:130: Now board a flagship (any one will do but it is best not to pick one too hard or too easy for your crew).
:130: Somehow make sure that they do not kill every enemy on the flagship (for me it was because the last enemy was glitched and wouldn't die, but you can just tell them not to kill it).
:130: Now somehow get yourself knocked out (I suggest grenades).
:130: Don't let yourself get revived though, just press the "go to jail" button. You shuld be at your port of call.
:130: Next change servers (this step is VERY IMPORTANT!!!)
:130:Now sail to whatever island you want to see empty (if you want to see your port of call empty skip this step).
:130: Go to any dingy on the island and select to board the ship that is in a flagship battle.
:130: It should make you should change servers to the ocean your ship is on. After that is done, a message should appear that says your ship is in a flagship battle (if your crew hasn't killed the last enemy yet).
:130: You are now on the same server you started on, but it is empty: no NCPs, no pirates, no "press-shift-to-enter-so-and-so.

An empty Tortuga on Abassa is really a sight to behold.

I understand this ( kinda ), but I don't see how a flagship and grenades can make your ship invincible. Is it that I throw a grenade just before a Flagship sinks?

Hmm
 

I think the grenades are for you to blow yourself up with.
Not for sinking any ships. Wonder what happens when your
crew all dies? Do you somehow go to jail? Interesting..

cool glitch i got it to work

u have to leave 1 crew mate behind