Optional Missions:
- Double assassinate Cockram and Burgess
- Free 2 pirates
First up, sail to Principe. Engage and destroy the enemy ships by the beach. After sinking all of them, dock at the nearby bay then swim to the viewpoint by the beach. Synchronize with it to reveal the immediate area and for you to find to nearby collectibles.
You can also go through the ledges north of the main entrance go around the the cliff where the encampment's cannons are located. This is a good route since it will be easier for you to move around and avoid most of the enemies and patrols. Move in to the location of the first pair of captive pirates. You have to kill the gunners and guards quietly. It will be best to use a berserk dart on the officer since he can take out anyone with one shot. There's also a gunner on the nearby rooftop so using darts on the the officer and the gunner will make it easier for you to route the other guards in the nearby stalking areas.
Make your way to the next set of prisoners and covertly take out the guards along the way. There's also a viewpoint on top of the guard tower near the walls to the southeast. If you can take out the gunner there. it will make your job easier. Once the patrols and other guards are taken care of, sneak behind the two gunners at the edge of the cliff and kill them to free the pirate captives.
Upon reaching the campsite, a cutscene will occur. Your next targets are located in the fort. Just keep using the shrubs and bushes to hide and eliminate guards along the way. After reaching Burgess and Cockram in the village below the fort, head down the road. Looking at the middle of the village, the alarm bell is quite visible. Ignore that and go up the rooftop of the house from the alarm bell and traverse the tree branches. Keep moving up above the high branches and turn on Eagle Vision. Once you have located Cockram and Burgess stay on the branch and wait until they pass under. Kill them both when you get the chance.