This mission will automatically begin when you jump out of the plane from the previous mission. You gain two new tools from mission on, which are the Wingsuit and the Parachute. When you get the prompt to deploy your Wingsuit, do so and pull back to start drifting towards the island, then deploy your Parachute and land on the island itself.
Your first objective here is to grab a truck from the pirates that are close to your location. Using the grass and trees as cover, scout the area and you’ll find that there are a total of 6 enemies near the truck, including two with RPGs. They are tightly packed together, so some kind of explosive will work very well here. Alternatively, you can shoot the tiger cage nearby to let it loose, which should help with a few of the enemies.
Once all of the men are dead, get in the truck and start driving towards Thurston Town. Inside the town, head inside the Crazy Cock bar. The bartender mentions something about a poker game in the back, so talk to the privateer to get invited to it. Walk downstairs and you’ll have to play through a hand of Poker. On the second hand, Jason will give the signal and Sam will quit. Follow suit and go out in the alley to meet with Sam and finish the mission.