Sequence 12–2: Royal Misfortune

Optional Missions:

- Use the rope darts to kill Roberts

- Kill 8 guards by destroying powder barrels

Track down Roberts' location in Africa by following the story marker, use the closest fast travel icon that you currently have to arrive there quicker. Head ashore and continue ahead. For your first optional mission, you have to use the gunpowder barrels along to kill multiple enemies. To do this, lure a bunch of enemies then detonate the barrel. Don't worry about taking damage with the explosion; you should be sturdy enough to survive the blast at this point.

Head to the marker and use your Eagle Vision to locate Roberts. He will begin to escape once you spot him, so chase him down fast until he returns to his own ship. Follow the Royal Fortune but don't stick too close since the nearby cliff will be blown and your path will be blocked. Go around and keep attacking Robert's ship continuously. Use your swivel guns to take out any fire barrels left along your path.

Once you've reached the open sea, the Spanish Navy will be waiting and engage Roberts as well. You have to destroy the other ships and incapacitate the Royal Fortune so you can move in and board it. Go up to one of the lower masts, find Roberts and keep hitting the Tool button with the Rope Dart equipped when he's below. When you're in range, you should be able to fire the Rope Dart and hang Roberts to complete the second optional mission.