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As in Alan Wake 2 and Control, reading various files and bits of correspondence in Alan Wake 2's Lake House expansion is key to understanding the story and the mystery at the chapter's heart. A lot of that correspondence is hidden on computers in the Lake House, a Federal Bureau of Control research facility where the DLC takes place, and if you want to disregard the right to privacy and figure out what happened down there, you're going to need to crack some passwords.
There are five password-protected computers in the Lake House DLC, and if you unlock all of them, you'll earn the Hard Work Trophy/Achievement along with the hidden information you'll glean from them. Some require you to figure out some puzzles by seeking out other notes and pieces of information, and others require you to be observant. Even though there are only five locked computers in the chapter, it can be very easy to miss a password or key piece of information, especially when you're under threat from the spooky denizens of the Lake House's halls.
Here's where you can find every password-protected computer in the Lake House, how you can figure out their passwords, and what those passwords are. We're going to spoil all those passwords, so if you'd rather figure them out yourself, now's the time to click away. But if you want to make sure you see everything the Lake House has to offer, read on.