Chapter 39: Sea of Doors

Follow our guide to navigate the Sea of Doors chapter in Bioshock Infinite. Learn how to progress through the lighthouse and bathysphere sections to reach the game's conclusion.

Alright, you've made it to Chapter 39, the 'Sea of Doors.' This part can feel a little disorienting, but don't worry, I'll walk you through it. When you get your bearings, Elizabeth will be right there. Just follow her through the door and keep moving until you both get into the bathysphere. Once inside, go ahead and pull that lever to get things moving.

After the bathysphere surfaces, you'll need to climb the steps and head into the lighthouse. Elizabeth will lead you down the stairs to the left. You'll come to a bridge that forms just for you – you can take it to the left or the right, it really doesn't matter which way you go. Your goal is the next lighthouse, so just enter the door when you get there.

You'll have a quick chat, and then Elizabeth will do her thing again, forming another bridge for you. Follow her across, reach the next lighthouse, and step through the door.

Now, you'll see a man ahead. Walk up to him and be ready to hit the button prompt when it appears. After the scene plays out, you'll need to climb the hill behind the pool and enter the door you find there.

Head into the door on the right. Inside, you'll need to interact with an object and then give it to the man waiting in the doorway.

Open the door again, and surprise! You're back on the boat from the very beginning of the game. Make your way to the dock, climb the ladder, and head for the lighthouse. Once inside, enter the door.

You'll see some people in the distance. Approach them and hit the button prompt when it pops up.

Once you regain control, head up and interact with the door on the left. Just wait for Elizabeth to finish her dialogue, and then step into the tear she opens.

And here we are, back on the boat from the start of the game again. When you reach the dock, climb the ladder and make your way to the lighthouse. Enter the door here, and a scene will play, marking the end of the game. Congratulations, you've just finished Bioshock Infinite!

Achievements:

• Tin Soldier — Completed the game on Easy difficulty or above. (10 points)
• Saw the Elephant — Completed the game on Normal difficulty or above. (25 points)
• Stone Cold Pinkerton — Completed the game on Hard difficulty or above. (50 points)
• Should Auld Acquaintance — Unlocked 1999 mode. (10 points)