Port Royale 3

Play the trader campaign and complete the first 3 missions.

- The first mission requires you to buy 100 barrels of sugar and deliver it to Port Royale

- Next you have the reach the rank of Mariner, do this by buying and selling goods to increase your overall worth.

- When you reach Mariner, all you have to do is sail to New Orleans and the achievement will unlock after the cutscene.